HomeEnginesKubota V2003

Kubota V2003 Engine

The Kubota V2003 is a 2 L engine rated at 1800 rpm. It powers generator sets from Cummins/Onan, including the MDKB. It holds 7.6 L (2.0 gal) of oil and 7.6 L (2.0 gal) of coolant.

Also known as: Kubota V2003

1.999 L
Displacement
1800 rpm
Rated speed
7.6 L
Oil capacity

Engine specifications

Oil capacity7.6 L
Coolant capacity7.6 L
Displacement1.999 L
Rated speed1800 rpm

Common problems

15
  • UNDERVOLTAGE 13
    Fix: Reduce the number of connected appliances, especially when air conditioners and battery chargers are running.
  • UNDERFREQUENCY—Engine governor unable to maintain rated frequency CODE NO. 15
    Fix: 1. Reduce the number of appliances running at the same time, especially those with high motor starting loads such as air conditioners. 2. Check the fuel tank and fill as necessary. (Note: The arrangement of pickup tubes in the fuel supply tank probably is such that the genset will run out of fuel before the propulsion engines.) 3. Remove any blockage in the combustion air inlet (front grille) or exhaust system. 4. Tighten loose fuel line fittings so that air cannot be drawn in by genset lift pump suction. 5. Drain and/or replace the fuel filter (Page 16) and prime the fuel system (Page 8). 6. Drain and/or replace fuel supply system filters and prime the fuel system (Page 8).
  • Underfrequency 15
    Fix: Check engine speed, loads, governor actuator operation, fuel supply, control plugs fully seated, quad leads fully seated in connector to control, quad winding resistance
  • THE STARTING BATTERIES DO NOT MAINTAIN A CHARGE (Marginal battery, battery connections or charging system)
    Fix: 1. Service as necessary by cleaning and tightening battery connections, recharging or replacing the battery or replacing damaged battery cables (p. 4-2). 2. Check the V-belt that drives the charging alternator and service as necessary (p. 4-13). 3. Check for and disconnect parasitic battery loads.
  • THE STARTING BATTERIES DO NOT MAINTAIN A CHARGE
    Cause: Marginal battery, battery connections or charging system
    Fix: 1. Service the battery as necessary by cleaning and tightening connections, recharging or replacing the battery or replacing damaged battery cables (p. 4-3). 2. Check for and disconnect parasitic battery loads.
  • THE STARTER ENGAGES AND DISENGAGES (Low cranking voltage)
    Fix: 1. De-energize the PTO clutch, if so equipped. 2. Service as necessary by cleaning and tightening battery connections, recharging or replacing the battery or replacing damaged battery cables (p. 4-2).
  • THE STARTER ENGAGES AND DISENGAGES
    Cause: Low cranking voltage
    Fix: 1. Push the generator set line circuit breaker OFF. 2. Service the battery as necessary by cleaning and tightening connections, recharging or replacing the battery or replacing damaged battery cables (p. 4-3).
  • The genset shuts down.
    Fix: See Troubleshooting (Section 9).
  • The genset shuts down
    Fix: See Troubleshooting (Page 7-1).
  • The genset fails to start
    Cause: Cranking will discontinue in 20 to 60 seconds, depending on how cold the engine is, and the amber status lamp will blink Shutdown Code No. 4 (Page 7-5). See Troubleshooting (Page 7-1) if the genset does not start after two or three tries.
  • The genset does not start after several tries. Fault Code No. 4
  • The generator set does not start after several tries. Fault Code No. 4
  • The e-Series Digital Display and/or control switch status lamp will indicate the numeric fault code.
    Fix: See Troubleshooting (Section 9).
  • The Digital Display will display the fault indefinitely.
    Fix: Touch any button to clear the fault. The Digital Display will turn off in 5 minutes after the fault has been cleared.
  • The Digital Display will display a description of the Fault, the numeric Fault code and the accumulated number of hours of generator set operating time when the Fault occurred
    Fix: Refer to TABLE 5-1. TROUBLESHOOTING GENERATOR SET FAULTS to diagnose and correct the problem.

Compiled from service & troubleshooting documentation across every generator set that uses the Kubota V2003.

Service intervals

40
ItemActionHoursMonthsNotes
Check Engine Oil LevelCheck8 hr
Drain Water from Fuel FilterDrain8 hr
Engine oil levelCheck8 hrEvery Day/8 Hrs (Table 4-1)
Exhaust systemInspect8 hrLook over entire exhaust system and listen for leaks every startup and after every eight hours of operation
Fuel FilterDrain8 hr
Fuel Filter WaterDrain8 hr
General InspectionCheck8 hrDaily, 8-Hr; includes Oil Level, Coolant Level, Fuel System, Exhaust System, Battery, and Sea Water Strainer Checks.
General InspectionInspect8 hrIncludes inspection of oil level, coolant level, fuel system, exhaust system, batteries and battery connections; before first start of day and after every 8 hours
General Inspection (Oil Level, Coolant Level, Fuel System, Exhaust System, Battery, Sea Water Strainer)Check8 hrEvery day, all models (MDKBH, MDKBJ, MDKBW, MDKB & MDKD, MDDCX)
General Inspection (oil, coolant, fuel, exhaust, batteries)Inspect8 hrevery day / before first start of the day
Generator setInspect8 hrGeneral Inspection before first start of the day and after every 8 hours of operation; includes oil level, coolant level, fuel system, exhaust system, batteries and battery connections
Change Engine Oil and Oil Filter - All except MDKBT & MDKBUChange50 hrFirst service — after first 50 hrs, then every 200 hrs/year
Change Engine Oil and Oil Filter - Only MDKBT & MDKBUChange50 hrFirst service — after first 50 hrs, then every 200 hrs/year
Engine Oil and Oil Filter (All except MDKBT & MDKBU) - after first 50 hoursChange50 hrFirst service — Break-in oil change; also change the oil and oil filter after the first 50 hours of operation on a new or re-built engine.
Engine Oil and Oil Filter (Only MDKBT & MDKBU) - after first 50 hoursChange50 hrFirst service
Engine oil and oil filter - all except MDKBT & MDKBUChange50 hrFirst service — After first 50 hours of operation; then per Table 4-1
Engine oil and oil filter - only MDKBT & MDKBUChange50 hrFirst service — After first 50 hours of operation; then per Table 4-1
Oil & Oil FilterChange200 hr12 moFirst service — After first 50 hours
BatteryCheck100 hr1 moSee battery manufacturer's recommendations
Battery and Battery ConnectionsInspect100 hr1 moSee battery manufacturer's recommendations.
Check V-Belt TensionCheck100 hrcheck for slippage, cracking and wear
Engine Oil and Oil Filter (All except MDKBT & MDKBU)Change100 hr1 moFirst service — Perform twice as often when using high sulfur fuel.
Fuel FiltersDrain100 hr1 moEvery Month / 100 Hrs
Inspect Battery and Battery ConnectionsInspect100 hrmonthly
Siphon BreakCheck500 hr12 moMonthly, 100-Hr
Siphon BreakInspect100 hr1 moEvery Month / 100 Hrs
Water from Fuel FilterDrain100 hr1 moEvery Month/100 Hrs
Water in Fuel FilterDrain100 hrEvery Month / 100 Hrs
Zinc AnodeInspect500 hr1 moReplace as recommended.
Zinc AnodeReplace500 hr12 moMonthly, 100-Hr; Model MDKAU does not have a zinc anode to replace.
Brushes & Slip RingsCheck200 hrYearly, 200 Hrs (MDKBH, MDKBJ, MDKBW only); must be performed by trained mechanic; not applicable to other listed models (—)
Engine Oil and Oil FilterChange200 hr12 moFirst service — Every Year/200 Hrs
Engine Oil and Oil Filter (Only MDKBT & MDKBU)Change200 hr12 moFirst service — Perform twice as often when using high sulfur fuel.
Engine Oil and Oil Filter—All except MDKBT & MDKBUChange200 hrFirst service — After first 50 hrs, then every year/200 hrs
Fuel FiltersReplace500 hr12 moReplace fuel filters if the engine lacks power.
Inspect Siphon BreakInspect200 hryearly
Oil/Oil FilterChange200 hrFirst service — Yearly, 200-Hr
Engine Oil and Oil Filter—Only MDKBT & MDKBUChange350 hrFirst service — After first 50 hrs, then every year/350 hrs
Inspect Zinc AnodeInspect350 hryearly
Replace Fuel FiltersReplace350 hryearly

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Service specifications

60
TypeItemValueUnitCondition
ClearanceV-Belt Tension Deflection0.4inch (10 mm) @ 20 lbs (10 kg)
ClearanceV-belt deflection3/8inch (10 mm) at 20 lbs (10 kg) applied
ClearanceV-belt deflection at 20 lbs (10 kg)3/8 inch (10 mm)in (mm)tension check at middle of pulley span
ClearanceV-belt deflection at middle of pulley span3/8 inch (10 mm)with 20 lbs (10 kg) applied
ClearanceValve Lash (cold) - D1105/V1505/V2003M/V2403M0.0071-0.0087in (0.18-0.22 mm)cold
ClearanceValve Lash (cold) - V3300-E2B0.009-0.010in (0.23-0.27 mm)cold
CompressionCompression Ratio (MDKAV/MDKAW/MDKAZ)22:1
CompressionCompression Ratio (MDKBD/MDKBE/MDKBF)23:1
GapV-belt deflection0.4inch (10 mm)20 pounds (10 kg) applied to middle of pulley span
Injection timingFuel Injection Timing12 deg BTDCdeg BTDC
Injection timingFuel Injection Timing13.5-15 deg BTDCdeg BTDC
Injection timingFuel Injection Timing14.25-15.75 deg BTDCdeg BTDC
Injection timingFuel Injection Timing14.75-16.25 deg BTDCdeg BTDC
Injection timingFuel Injection Timing15.5 - 17.5° BTDC
Injection timingFuel Injection Timing18° – 20°BTDC
Injection timingFuel Injection Timing - D110514.75-16.25° BTDC
Injection timingFuel Injection Timing - V150514.25-15.75° BTDC
Injection timingFuel Injection Timing - V2003M13.5-15° BTDC
Injection timingFuel Injection Timing - V2403M13.5-15° BTDC
Injection timingFuel Injection Timing - V3300-E2B12° BTDC
Injection timingFuel injection timing12degrees BTDC
Injection timingFuel injection timing14.5degrees BTDC
Injection timingFuel injection timing16degrees BTDC
Injection timingFuel injection timing16.5degrees BTDC
Injection timingFuel injection timing18 - 20degrees BTDCtiming marks line up at 19 degrees BTDC
OtherBattery cable gauge1AWGtotal cable length 22 ft (6.7 m); approx. diameter 9.43 mm
OtherBattery cable gauge1/0AWGtotal cable length 30 ft (9.1 m); approx. diameter 9.46 mm
OtherBattery cable gauge2AWGtotal cable length 18 ft (5.5 m); approx. diameter 7.42 mm
OtherBattery cable gauge3AWGtotal cable length 14 ft (4.3 m); approx. diameter 6.61 mm
OtherBattery cable gauge4AWGtotal cable length 10 ft (3 m); approx. diameter 5.88 mm
OtherCompression Ratio22.8:1
OtherCompression Ratio24.3:1
OtherCompression Ratio24:1
OtherCompression ratio22.5:1
OtherCompression ratio22:1
OtherCompression ratio23:1
OtherFiring order (clockwise rotation)1-2-3
OtherFiring order (clockwise rotation)1-2-4-3
OtherFiring order (clockwise rotation)1-3-4-2
OtherFiring order (clockwise rotation)1-3-5-4-2
OtherFuel Injection Order (Firing Order, clockwise rotation)1-2
OtherFuel pump delivery (test)2/3liter per minuteprime test, 1 liter container
OtherHigh AC Frequency shutdown (Code 14)70 Hz for 40 ms, or 2% over nominal for 6 secondsafter starter engaged
OtherLow AC Frequency shutdown (Code 15)90% of nominal for more than 8 secondsduring normal operation
OtherMaximum Angularity10 deg Continuous, 22.5 deg Intermittentdeg
OtherMaximum angularity10 continuous, 22.5 intermittentdegrees
OtherMaximum angularity10 degrees continuous, 22.5 degrees intermittent
OtherMinimum CCA rating SAE at 32 F (0 C)360amps
OtherMinimum CCA rating SAE at 32 F (0 C)500amps
OtherMinimum CCA rating SAE at 32 F (0 C)625amps
OtherPreheat duration prior to cranking (maximum)15secondsengine temperature dependent
PressureCooling system pressure10psi
PressureCooling system pressure7psi
PressureCooling system pressure (pressure cap)10psi
PressureCooling system pressure (pressure cap)7psi
PressureFuel injection pressure1991psi (13.73 MPa)
PressureMax coolant friction head1 psi (6.9 kPa)psi (kPa)
PressureMax exhaust back pressure3 in (76 mm) Hgin Hg (mm Hg)
PressureMaximum Exhaust Back Pressure3inch Hg (76 mm Hg)
PressureMaximum coolant friction head1 psi (6.9 kPa)

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Recommended fluids

FluidGradeStandardAmbientCapacityNotes
Coolant50/50 water/ethylene glycol2.1 LMDKBH; also stated as 2.2 Qt
CoolantFleetguard ES Compleat / EG Premix antifreeze (ethylene glycol based)Purple coloured viscous liquid; boiling point 107 C, flash point 121 C.
CoolantFleetguard ES Compleat and EG Premix (ethylene glycol based)
Coolant50/50 ethylene glycol/waterASTM D5345 (prediluted) or ASTM D4985 (concentrated, 40-60% quality water)above -37°CProtects to -34°F (-37°C)
Coolant50/50 mixture of water and ethylene glycolASTM D5345 for 50/50 prediluted coolant or ASTM D4985 for concentrated coolant with 40% to 60% quality waterabove -37°CProtection from freezing down to -34 F (-37 C); use fresh low-mineral water, distilled best. Coolant capacity: 4.0 liter MDKBK/MDKBL; 5.0 liter MDKBM/MDKBN; 7.6 liter MDKBP/MDKBR/MDKBS; 13.7 liter MDKBT/MDKBU
Coolant50/50 mixture of water and ethylene glycol antifreeze, fully formulated with rust inhibitors and coolant stabilizersASTM D5345 for 50/50 prediluted coolant or ASTM D4985 for concentrated coolant with 40% to 60% quality waterabove -37°C50/50 mixture gives protection from freezing down to -34 F (-37 C); use fresh water low in minerals and corrosive chemicals (distilled best)
CoolantEthylene glycol antifreeze, 50/50 mixture of water and ethylene glycolASTM D5345 for 50/50 prediluted coolant or ASTM D4985 for concentrated coolant with 40% to 60% quality waterabove -37°CProvides protection from freezing down to -34 F (-37 C). Use fresh water low in minerals; distilled water is best. Fully formulated with rust inhibitors and coolant stabilizers.
CoolantEthylene glycol antifreeze, fully formulated with rust inhibitors and coolant stabilizers; 50/50 mixture of water and ethylene glycolabove -37°C2.1 literProtection from freezing down to -34°F (-37°C); use fresh water low in minerals, distilled best
Coolantethylene glycol antifreeze, 50/50 mixture with waterabove -37°CGood to -34F (-37C)
Coolantethylene glycol antifreeze, 50/50 mixture with water for freeze protection to -34°F (-37°C)ASTM D5345 (50/50 prediluted) or ASTM D4985 (concentrated, 40-60% quality water)above 37°Cdistilled water best
Engine oil15W402.1 LMDKBH; also stated as 2.2 Qt. Shipped with 15W40 engine oil.
Engine oilAPI CH-4 or better, SAE 15W-40 recommended year-roundAPI/SAESynthetic motor oil not recommended
Engine oilAPI Service Category CI-4 or better; SAE 15W-40 recommended year-roundAPIchoose viscosity per Figure 3-1 ambient chart
Engine oilMultigrade oils such as SAE 15W-40 recommended for year-round use; choose SAE viscosity grade per ambient temperature (Figure 3-1)API Service Category CI-4 or better4.0 L for MDKBK/MDKBL; 4.3 L for MDKBM/MDKBN; 7.6 L for MDKBP/MDKBR; 12 L for MDKBS; 10.4 L for MDKBT/MDKBU
Engine oilPremium Blue E 15W402.1 L (2.2 qt)Lubricant oil - Premium Blue E 15W40
Engine oilSAE 15W-40 (multi-grade recommended for year-round use)API CF, CF-4, CG-4, CH-4 or CI-4Emissions-regulated areas: CF, CF-4, CG-4, CH-4 or CI-4 with low sulfur or ultra low sulfur fuel. Non-regulated areas with high sulfur fuel: CF class recommended; if CF-4/CG-4/CH-4/CI-4 used, change oil and oil filter twice as often.
Engine oilSAE 15W-40 (multigrade recommended for year-round use); choose viscosity grade for ambient temperature (Figure 3-1)API Service Category CI-4 or better
Engine oilSAE 15W-40 (multigrade) recommended for year-round useAPI Service Category CI-4 or better2.1 literChoose viscosity grade appropriate for ambient temperatures expected until next scheduled oil change
Engine oilSAE 15W-40 multi-grade recommended for year-round useAPI Service Category CI-4 or better2.1 literChoose viscosity grade appropriate for ambient temperatures expected until the next scheduled oil change (Figure 3-1)
Engine oilSAE 15W-40 multigrade recommended; choose viscosity grade per ambient temperature (Figure 3-1)API Service Category CI-4 or betterLube oil capacity: 4.2 quart (4.0 liter) MDKBK/MDKBL; 4.5 quart (4.3 liter) MDKBM/MDKBN; 8 quart (7.6 liter) MDKBP/MDKBR; 12.7 quart (12 liter) MDKBS; 11 quart (10.4 liter) MDKBT/MDKBU. Add 1 quart (0.9 liter) when level falls to ADD mark.
FuelGas Oil (red diesel, fuel oil, type A1 or A2)USCG TYPE A1 or ISO 7840-A1 fuel hoses
FuelGrade 2-D diesel fuelEN 590 or ASTM D975Use Grade 1-D diesel fuel if fuel tank is exposed to temperatures below 40 degrees F (5 degrees C); cetane number not less than 45; sulfur content not more than 0.5 percent by weight; lubricity min load level 3100 grams (ASTM D6078) or max scar diameter 0.45 mm (ASTM D6079 or ISO 12156-1)
FuelGrade 2-D diesel fuel (Grade 1-D if tank exposed below 40 F (5 C))EN 590 or ASTM D975; Cetane number not less than 45; sulfur content not more than 0.5 percent by weightFuel lubricity: minimum load level 3100 grams per ASTM D6078 or maximum scar diameter 0.45 mm per ASTM D6079 or ISO 12156-1
FuelGrade 2-D diesel; Grade 1-D if tank exposed below 40°F (5°C); Cetane ≥45, sulfur ≤0.5% by weightEN 590 or ASTM D975B5 Bio-Diesel meeting industry spec is suitable
FuelHigh quality Grade 2-D diesel fuel; use Grade 1-D below 40 F (5 C)EN 590 or ASTM D975Cetane number not less than 45; sulfur not more than 0.5 percent by weight; cloud point at least 10 F (6 C) below lowest expected fuel temperature; lubricity min load 3100 grams per ASTM D6078 or max scar 0.45 mm per ASTM D6079/ISO 12156-1; ULSD and B5 bio-diesel suitable
FuelHigh quality Grade 2-D diesel fuel; use Grade 1-D if fuel tank exposed to temperatures below 40°F (5°C)EN 590 or ASTM D975Cetane number not less than 45; sulfur content not more than 0.5 percent by weight; fuel lubricity min 3100 grams per ASTM D6078 or max scar diameter 0.45 mm per ASTM D6079/ISO 12156-1
FuelNo. 2 diesel (ASTM Grade 2-D)ASTMCetane number not less than 45, sulfur content not more than 0.5% by weight
FuelNo. 2 diesel fuelTypical fuel consumption values are for No. 2 diesel fuel
FuelNo. 2-D Diesel Fuel; Grade 1-D below 14 F (-10 C)EN 590 or ASTM D975; lubricity per ASTM D6078 (min 3100 g) or ASTM D6079 / ISO 12156-1 (max 0.45 mm scar); minimum fuel cetane rating 45 (50 below -4 F (-20 C) or above 5000 ft (1500 m))Use Grade 2-D S500 or 2-D S15; below 14 F (-10 C) use Grade 1-D S500 or 1-D S15. US EPA non-road limit 500 ppm sulfur (2010: 15 ppm). Do not use diesel fuel with sulfur content greater than 10,000 ppm (1.0% weight). B5 Bio-Diesel meeting industry specifications and quality is suitable.
FuelNo. 2-D diesel fuel (Grade 1-D if the fuel tank is exposed to temperatures below 40 F (5 C))EN 590 or ASTM D975Cetane number not less than 45; sulfur content not more than 0.5 percent by weight; lubricity minimum load 3100 grams per ASTM D6078 or maximum scar diameter 0.45 mm per ASTM D6079 or ISO 12156-1; ULSD meeting ASTM D975 lubricity suitable; B5 Bio-Diesel meeting industry specifications suitable

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Fault codes

33
CodeNameMeaningSeverityAction
1One blinkShutdown due to high engine temperatureShutdownOpen sea valve; clean sea water strainer; check coolant level and repair leaks; check/replace raw water hoses; readjust a loose pump belt (p. 4-9); replace worn raw water impeller (p. 4-10); clean heat exchanger (p. 4-12); check through-hull; drain/clean cooling system (p. 4-6); replace coolant thermostat (p. 4-8); tighten coolant sender E2 ring terminal; test/replace sender E2; check continuity Pin 9 to E2
12OvervoltageOutput voltage jumped to more than 125% of rated for 75 ms or more than 115% of rated for 3 s after voltage regulation enabledShutdownSee an authorized Onan service representative.
13UndervoltageOutput voltage fell to less than 90% of rated for 5 seconds after voltage regulation enabledShutdownTurn line breaker OFF, disconnect PTO, reduce loads; fill fuel tank; check fuel fittings and filters; replace fuel filters.
14OverfrequencyFrequency jumped to more than 70 Hz for 40 ms or more than 2% over nominal for 6 secondsShutdownReset breaker after starting, tighten fuel fittings, prime fuel system
15UnderfrequencyFrequency fell to less than 90% of nominal for more than 8 seconds during normal operationShutdownTurn breaker OFF, de-energize PTO, reduce loads; fill fuel; prime fuel system; remove air/exhaust blockages; check fuel fittings; replace fuel filters; check for contaminated fuel.
17OverprimePrime mode exceeded 5 minutesShutdownRemove object holding control switch in prime position
2Two blinksTwo blinks indicate shutdown due to low oil pressure.ShutdownCheck oil level; tighten sender E1 ring terminal; check sender E1 resistance and replace if necessary; check continuity Pin 10 to E1; replace sender with a gauge and service the engine lubrication system if oil pressure is less than 14 psi (98 kPa)
22Governor OverloadMaximum allowable time at full-duty cycle was exceededShutdownReduce the number of appliances running at the same time; check the fuel tank and fill; remove any blockage in the combustion air inlet or exhaust system; check fuel fittings for leaks and reprime; replace the fuel filters and reprime.
23Faulty Oil Pressure SenderController sensed grounded senderWarningTighten the ring terminal on sender E1; check continuity between Pin 10 and ring terminal E1-1; test sender E1 and replace as necessary; replace the genset controller
24Faulty Temperature SenderController sensed open senderWarningTighten the ring terminal on sender E2; check continuity between Pin 9 and ring terminal E2-1; test sender E2 and replace as necessary; replace the genset controller
27Loss of Voltage SenseThe genset Controller lost VAC sensing during normal voltage regulation when the field was functioning normally and frequency was at least 40 HzShutdownSee an authorized Onan service representative.
29High Battery VoltageDuring startup the genset Controller sensed that battery system voltage was greater than 19.2 voltsWarningCheck battery voltage, battery connections, battery charge rate.
3Three blinksThree blinks indicate shutdown requiring service by trained and experienced service personnel.WarningSee Troubleshooting in the Operator's Manual
32Starting FaultThe genset Controller could not detect cranking speed (quadrature zero crossings) for 3 secondsShutdownHave the propulsion engines running while trying to start the genset; service the battery; change to oil of proper viscosity for the ambient temperature.
35Control Card Failure–EEMicroprocessor EEPROM error during self-testShutdownVerify fault.
36Unknown ShutdownThe genset Controller declared this fault because engine speed fell below 1000 RPM for 0.5 seconds, though not by genset or engine control actionShutdownReduce the number of loads on the genset; check fuel level and refill; prime the fuel system for at least 30 seconds; check fuel fittings for leaks and reprime; replace the fuel filters and reprime.
37Invalid Set ConfigurationThe genset controller is not configured properly for the gensetWarningSee an authorized Onan service representative.
38Field OverloadHigh field voltage induced by high rotor temperature or low power factor loadsShutdownRemove generator air flow blockages; reduce appliances; have air conditioners and other appliances checked.
4OvercrankShutdown due to a failure to start within the time allowed for crankingShutdownPush line circuit breaker OFF; check fuel tank and fill; remove combustion air or exhaust blockages; open closed fuel valves; prime the fuel system at least 30 seconds; service the battery; check all fuel filters and fittings and reprime; replace fuel filters; change to proper oil viscosity; conduct fuel pump test; inspect glow plugs; service fuel injectors and worn engine
41Grounded RotorF+ groundedShutdownVerify fault.
42Processor FailureMicroprocessor ROM error during self-testShutdownVerify fault.
43Processor FailureMicroprocessor RAM error during self-testShutdownVerify fault.
45Speed Sense LostController lost speed sense (quadrature zero crossings) for 0.25 seconds after start disconnectShutdownSee an authorized Onan service representative.
46Genset OverloadThe genset Controller shutdown the genset because engine load exceeded 135 percent of genset rating for 10 secondsShutdownReduce the number of loads on the genset.
48Processor FailureController unable to sense field voltageShutdownVerify fault.
5Warning—Shutdown Due to Vessel COShutdown due to Vessel COWarningGet everyone out into fresh air immediately and seek medical attention.
57OverprimeA local or remote control switch was held in the Prime position for more than 5 minutesWarningRemove object holding switch in prime position, replace faulty control switch
58High Exhaust TemperatureExhaust temperature rises because of loss of waterShutdownReconnect/replace raw water hoses, replace impeller
59Low Coolant LevelThe engine coolant level fell below the optional coolant level sensorWarningAdd coolant, repair leaks
61External ShutdownThe generator set was shut down by a fire suppression system or other external controlShutdownMake necessary repairs and reset the external control which shut down the genset
7Seven blinksWater stops flowingShutdownOpen the sea cock; check for and clean a blocked sea water strainer; check for kinked or leaking hoses; check/replace the raw water impeller; check the hull through-hull fitting for blockage.
Code No. 5Warning - Shutdown due to Vessel COShutdown occurring due to the vessel CO detectorWarningAll status indicator lights in the control circuit will also blink the fault code. See Troubleshooting Chapter of the Operator Manual.
Code No. 61Emergency ShutdownShutdown occurring due to external emergency shutdown deviceShutdownAll status indicator lights in the control circuit will also blink the fault code. See Troubleshooting Chapter of the Operator Manual.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Procedures

12
Adjusting High-Idle Speed adjustment

⚠ Keep your hands away from the engine belt and pulleys.

⚠ The actuator could overheat if the battery is left on more than 10 minutes.

⚠ Be prepared to clamp off supply and return fuel lines to stop the engine.

Tools: strobe or injector clamp-on tachometer, 12 volt battery, battery switch

  1. Adjust the speed control lever stop.
  2. Measure engine speed with a strobe or injector clamp-on type tachometer.
  3. Remove the front and top access doors and loosen the front/left side panel assembly for access to the speed adjusting screw.
  4. Disconnect the actuator leads and connect a 12 volt battery to the actuator terminals using a battery switch.
  5. Switch the battery on, start the genset, measure engine speed (rpm) and stop the engine by switching off the battery.
  6. Loosen the lock nuts on the two bottom screws and back out the clamping screw if speed is not between 3300 and 3400 rpm.
  7. To increase speed turn the speed adjusting screw in 1 turn clockwise; to decrease turn it out 1 turn counterclockwise.
  8. Repeat until high-idle speed is between 3300 and 3400 rpm and set the lock nut.
  9. Run the clamping screw in by hand until snug, back it out 1-1/2 turns and set the lock nut.
Adjusting Speed Control Lever Stop adjustment

⚠ Accidental or remote starting can cause severe personal injury; disconnect the negative battery cable.

  1. Remove the front and top access doors and loosen the front/left side panel assembly so it can swing left.
  2. Loosen the stop screw locknut and back the screw out a few turns.
  3. Turn the stop screw in until it just makes contact and set the locknut.
Adjusting V-Belt Tension adjustment

⚠ Accidental or remote starting can cause severe personal injury or death.

  1. Disconnect the negative cable at the battery.
  2. Remove the belt guard or enclosure top panel and access doors.
  3. Loosen the alternator pivot bolt first, then the adjusting bracket bolt on top.
  4. Pivot the alternator out to tighten belt tension.
  5. Check tension by applying 20 pounds (10 kg) to the middle of the pulley span.
  6. Tighten alternator bolts when deflection is 3/8 inch (10 mm), secure guard and reconnect cables, negative last.
Adjusting Valve Lash adjustment

⚠ Do not use the fuel injection timing marks when adjusting valve lash.

  1. Rotate the engine clockwise (looking from the front) until the intake valve push rod just stops moving down (valve closed).
  2. Turn the engine one half turn more.
  3. Adjust lash for both intake and exhaust valves of that cylinder.
  4. Repeat this procedure for the other cylinder.
Adjusting Voltage Using Control Switch adjustment

Tools: separate voltmeter

  1. Start the genset and let voltage and frequency stabilize for 5 to 10 seconds with all loads disconnected.
  2. Rapidly press START 6 times during the first minute after startup to enter voltage adjust mode.
  3. To adjust voltage up, press and quickly release START (about 0.6 volts per press).
  4. To adjust voltage down, press and hold START for about 2 seconds (about 0.6 volts each press).
  5. Wait about 20 seconds for the amber lamp to stop blinking, then press STOP to save the adjustment.
  6. Restart the genset and check voltage.
Adjusting Voltage Using Digital Display adjustment
  1. Start generator set and let voltage and frequency stabilize 5 to 10 seconds; disconnect all loads.
  2. Rapidly press START 6 times during the first minute after startup to enter voltage adjust mode.
  3. Press and quickly release START to increase voltage approximately 0.6 volts per press.
  4. Press and hold START about 1 second to adjust voltage down.
  5. Wait about 20 seconds for status to change from Volt Adj to Running, then press STOP to save.
  6. Restart the generator set and check voltage; recalibrate AC voltage on the digital display.
Adjusting Voltage Using Optional Digital Display adjustment

Tools: Separate voltmeter

  1. Start the genset and let voltage and frequency stabilize for 5 to 10 seconds; make sure all loads have been disconnected.
  2. Rapidly press START 6 times during the first minute after startup to put the genset controller into voltage adjust mode.
  3. To adjust voltage up, press and quickly release START; voltage increases approximately 0.6 volts each press and release.
  4. To adjust voltage down, press and hold START for about 1 second; voltage decreases approximately 0.6 volts each press and release.
  5. Wait about 20 seconds for the Display to indicate a Status change from Volt Adj to Running, then press STOP to stop the genset and save the adjustment.
  6. Restart the genset and check voltage.
  7. Recalibrate AC Voltage on the Digital Display as instructed in the Operator's Manual.
Changing Frequency adjustment
  1. The genset control box has jumper leads marked HZ SEL and 60 HZ.
  2. Connect for 60 HZ; disconnect for 50 HZ.
  3. Apply the appropriate reconfiguration label over the 'As Manufactured' block on the nameplate.
Changing Generator Set Frequency adjustment

⚠ When changing frequency, make sure the line circuit breakers are suitable for the new output.

  1. Remove the control box cover.
  2. Connect J5 to P6 for 60 Hz.
  3. Disconnect J5 from P7 for 50 Hz.
  4. Apply the appropriate reconfiguration label.
  5. Replace the control box cover.
  6. Check and adjust voltage as necessary after the frequency has been changed.
Configuring the Controller Using Control Switch adjustment

⚠ In configuration mode the control will not start, prime or display faults.

  1. Remove the insulating connectors from harness connectors CONFIG 1 and CONFIG 2 and connect them together.
  2. Press START to increase the code number or STOP to decrease it one unit each press.
  3. Set the configuration code number to 19 for this genset.
  4. Verify the status lamp blinks one blink, pause, then nine blinks.
  5. Disconnect CONFIG 1 from CONFIG 2 and re-install the insulating connectors.
Disabling Battery Charger adjustment
  1. Disconnect the leads marked B1, B2 and B+ from the quick-connect terminals on battery charging voltage regulator.
  2. Insulate the end of each lead with several wraps of listed electrical insulating tape and tie them neatly into the wiring harness.
  3. Secure the access cover when done.
Drive Belt, Water Pump - Adjust / Replace adjustment
  1. Disconnect and connect battery cables, engine wiring harness, fuel lines, exhaust hose, coolant hoses
  2. Drain and refill engine fluids
  3. Remove and install soundshield as needed
  4. Remove and install pump drive belt
  5. Adjust belt tension
  6. Test run unit

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Voltage reconnection

VoltagePhaseConnectionLeadsNotes
50 Hz: Disconnect J5 from P7J5, P6, P7Frequency selection jumper leads in the genset control box
60 Hz: Connect J5 to P6J5, P6, P7Frequency selection jumper leads in the genset control box
HZ SEL / 60 HZ jumper leads in the control boxHZ SEL, 60 HZConnect for 60 Hz; disconnect for 50 Hz. Apply the appropriate reconfiguration label. Generator reconnection per schematic on Page A-2.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Aftermarket parts that fit this engine

60
6655216 FridayParts $20.48 16412-73030 FridayParts $50.00 6684865 FridayParts $68.25 Solenoid1G925-60011 FridayParts $34.99 1A084-60012 FridayParts $35.04 1A084-60010 FridayParts $35.04 1A021-73012 FridayParts $15.00 6684850 FridayParts $29.00 6674172 KuduParts $14.00 16604-52030 FridayParts $34.65 1J860-03040 FridayParts $455.84 15291-43010 KuduParts $43.00 4134270 FridayParts $46.50 R-311 FridayParts $19.01 AR-522 FridayParts $16.80 R-311T FridayParts $16.80 15469-97010 FridayParts $11.24 4Pcs FridayParts $7.88 6684843 FridayParts $899.99 15425-63010 FridayParts $125.35 1E013-35013 FridayParts $45.00 1E013-35010 FridayParts $45.00 1A021-60014 FridayParts $32.88 1A021-60015 FridayParts $32.88 6675656 FridayParts $843.65 7019022 FridayParts $843.65 6667996 FridayParts $843.65 1G922-51013 FridayParts $400.00 1G852-51012 FridayParts $400.00 1G852-51010 FridayParts $400.00 16454-53900 FridayParts $70.27 7022162 FridayParts $522.50 6684828 FridayParts $522.50 19077-53650 Amazon eBay FridayParts $21.00 1A021-56602 FridayParts $19.50 6684825 FridayParts $19.99 7000320 FridayParts $540.30 7171577 FridayParts $540.30 6682482 FridayParts $540.30 7350311 FridayParts $151.94 6683915 FridayParts $108.50 7107449 KuduParts $47.00 1G896-12310 FridayParts $105.00 16419-53900 SinoCMP $139.00 16419-53905 SinoCMP $139.00 19077-53714 KuduParts $37.00 19077-53723 KuduParts $37.00 19077-53733 KuduParts $37.00 1G730-73035 FridayParts $46.57 1G730-73036 FridayParts $46.57 18Pcs FridayParts $109.99 6655158 FridayParts $138.90 6684803 FridayParts $72.99 1E401-73012 FridayParts $13.99 17331-73030 FridayParts $75.00 15321-73010 FridayParts $17.75 15321-73260 Amazon eBay FridayParts $19.77 6653859 FridayParts $35.50 1A021-04130 KuduParts $19.00 1G953-97010 FridayParts $20.36

Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.

Also used in

12
  • Bobcat 5600 — Turf Cutter
  • Bobcat S130 — Skid Steer Loader
  • Bobcat S150 — Skid Steer Loader
  • Bobcat S160H — Skid Steer Loader
  • Bobcat S175 — Skid Steer Loader
  • Bobcat S175H — Skid Steer Loader
  • Bobcat S185 — Skid Steer Loader
  • Bobcat S185H — Skid Steer Loader
  • Case/Case Ih 6010 — Drilling Equipment
  • Thomas 175 — Skid Steer Loader
  • Thomas 205 — Skid Steer Loader
  • Toro GROUNDSMASTER 4500D — Mower

Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.

Common questions

What is the oil capacity of the Kubota V2003?

The Kubota V2003 engine has an oil capacity of 7.6 liters.

What is the displacement of the Kubota V2003?

The Kubota V2003 has a displacement of 1.999 liters.

Which generators use the Kubota V2003 engine?

The Kubota V2003 powers 1 generator set(s), including Cummins/Onan MDKB.

What is a common problem with the Kubota V2003 engine?

A commonly reported issue on generators using the Kubota V2003 is: UNDERVOLTAGE. Fix: Reduce the number of connected appliances, especially when air conditioners and battery chargers are running..