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Cummins/Onan 350 IDIFIN Generator Set

The Cummins/Onan 350 IDIFIN is a 350 kW Diesel standby generator set powered by a Cummins/Onan KTA-1150-G engine. It is available at 480 V and 208 V, 3-phase and 60 Hz. Starting uses 2 group-BCI batteries rated 975 CCA at 12 V.

350 kW
Standby
1
Document types

How to read your Cummins/Onan serial & model number →

Typical fuel consumption for 350–355 kW Diesel generators →

Compare with other 350–355 kW Diesel generators →

Service parts for the 350 IDIFIN

Grouped by system, with how many of each the parts manual calls for.

Cooling system

1 required
CS8-1131Coolant filtersee priceAmazon

Prices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.

Specifications

FuelDiesel
Frequency60.0 Hz
Standby power350 kW
Voltage options480 V, 208 V
Phase3
Power factor0.8
Battery groupBCI
Battery cranking975 CCA
Battery voltage12 V
Battery quantity2

Engine

Cummins/Onan KTA-1150-G
Rated speed1800 rpm

Filters for the Cummins/Onan KTA-1150-G

6

Engine-mounted filters the filter manufacturers list for this engine family. These come from the engine, not from this generator set’s own parts list, so confirm against your serial number before ordering.

SystemFilterDescriptionCross-references
Oil filterP550777Lube Filter, Spin-On BypassCUMMINS 3021658, CUMMINS 33004232, NAPA 1749, BALDWIN B7577 FridayParts $43.56
Oil filterP551670Lube Filter, Spin-On Full FlowCUMMINS 298670, CUMMINS 299670, NAPA 1970, CARBOCOL 0026 FridayParts $26.68
Fuel filterP550105Fuel Filter, Spin-On PrimaryCUMMINS 154700, CUMMINS 154710, NAPA 3109, NAPA 3405 buy
Fuel / water separatorP550106Fuel Filter, Water Separator Spin-OnCUMMINS 154789, CUMMINS 156164, NAPA 3405, BALDWIN BF957-D FridayParts $285.60
Fuel / water separatorP558000Fuel Filter, Water Separator Spin-On Twist&DrainCUMMINS 3308638, CUMMINS 3308683, NAPA 3405, NAPA 3693 KuduParts $24.00 FridayParts $25.66
Coolant filterP554071Coolant Filter, Spin-OnCUMMINS 209604, CUMMINS 209606, NAPA 4071, WALGAHN-MOTORENTECHN 00811412 FridayParts $397.60

Maintenance & consumables

for the Cummins/Onan KTA-1150-G
ItemSpecCapacityPart #Interval
Air filter—1200 hr
Fuel filterFS-1304—500 hr
Oil filterFS-1386—1200 hr
Battery—500 hr
Belt—1200 hr
Coolant—500 hr
Coolant filterspin-on type corrosion filterCS8-1131 Amazon eBay
Oil—8 hr
Spark plug—1200 hr

Common questions

How many kW is the Cummins/Onan 350 IDIFIN?

The Cummins/Onan 350 IDIFIN is rated 350 kW standby.

What engine does the Cummins/Onan 350 IDIFIN use?

The Cummins/Onan 350 IDIFIN is powered by the Cummins/Onan KTA-1150-G engine.

What kind of fuel does the Cummins/Onan 350 IDIFIN run on?

The Cummins/Onan 350 IDIFIN runs on Diesel.

What voltages is the Cummins/Onan 350 IDIFIN available in?

The Cummins/Onan 350 IDIFIN is offered in 480 V, 208 V, 3-phase.

What size battery does the Cummins/Onan 350 IDIFIN need?

The Cummins/Onan 350 IDIFIN uses 2 batteryies, 12 V each, 975 CCA, group BCI, per the manufacturer specification sheet.

Troubleshooting

6

Symptoms & remedies

SymptomCauseRemedy
Engine stops cranking and fault lamp lights, after cranking approximately 75 secondsCheck for empty fuel tank, fuel system leaks, or plugged fuel filters and/or supply lines. Correct as required.
Fault lamp lights immediately after engine starts and unit shuts downPossible overspeed conditionCheck the governor and throttle linkage for binding and freedom of movement. Check electronic governor connections. Contact an Onan Distributor or the engine manufacturer if linkage is not at fault.
Fault lamp lights and engine shuts down after running for a periodLow oil levelCheck oil level and replenish if necessary.
Fault lamp lights and engine shuts down after running for a periodLow coolant levelCheck coolant level of radiator and heat exchanger sets and replenish if necessary.
Fault lamp lights and engine shuts down after running for a periodSlipping drive belts or obstructions to the airflowCheck for slipping drive belts or for obstructions to the airflow.
Fault lamp lights and engine shuts down after running for a periodWater flow valve on city water cooled sets out of adjustmentCheck water flow valve on city water cooled sets and adjust if necessary.

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan 350 IDIFIN troubleshooting guide (20 entries) →

Parts

4
Part #DescriptionQtySystem
960-0121BCI Group SIZ@2Battery Amazon eBay
C-1067CRANKCASE BREATHERBreather Amazon eBay
CS8-1131spin-on type corrosion filter4Coolant filter Amazon eBay
B184PHASE SELECTOR SWITCH1Service part / kit Amazon eBay

Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Available documents

Service manual — 960-0121 Onan DFN Operator's Manual (5-1982) (Cummins/Onan)

This page was generated from the 1 manufacturer document above by automated extraction; every figure shown is copied from one of them. How the data is compiled.