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Kubota EA300 Engine

The Kubota EA300 is a 0.31 L 1-cylinder permanent magnet engine rated at 3000 rpm, producing up to 5.1 kW. It powers generator sets from Fischer Panda, including the 4000i, 5000i PMS, Panda 5000i PMS and Panda 5K PMS. It holds 1.3 L (0.3 gal) of oil.

Also known as: EA300, Kubota EA300

0.309 L

Displacement

Cylinders

3000 rpm

Rated speed

5 kW

Gross power

On this pageSpecs Generator sets Maintenance FAQ Service intervals Torque & specs Fluids Fault codes Procedures Wiring

Engine specifications

Oil capacity	1.3 L
Displacement	0.309 L
Cylinders	1
Aspiration	permanent magnet
Rated speed	3000 rpm
Gross power	5 kW

Generator sets powered by this engine

Fischer Panda 4000i Fischer Panda 5000i PMSFischer Panda Panda 5000i PMSFischer Panda Panda 5K PMS

How to read your Kubota engine serial & model number →

Maintenance schedule

Item	Spec	Part #	Interval
Air filter	air filter	—	150 hr
Fuel filter	fuel filter	—	150 hr
Oil filter	engine oil filter	—	150 hr
Battery	starter battery	—
Belt		—	150 hr
Coolant	cooling water	—
Oil	After the oil level check and refilling the oil	—	85 hr
Spark plug		—

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Service intervals

Item	Action	Hours	Months	Notes
Cooling system	Other	10 hr		First service — Re-ventilate 10 operating hours after first start-up
Cooling water circuit	Inspect	10 hr		First service — Re-ventilating process 10 operating hours after first start-up, and if necessary.
Engine oil	Change	150 hr		First service — afterwards after 150 hours
Engine oil filter	Change	150 hr		First service — with oil change
Engine oil filter	Replace	150 hr		With engine oil change; not used with EA300 engines
Generator	Inspect	150 hr		Complete 150 h inspection after long-term standstill
Oil filter	Change	150 hr		With engine oil change; not with generators with EA300 engines.
Service interval	Other	150 hr		Can be raised up to 30 % (200 h max.) with dynamic operation hours.
V-belt	Check	150 hr		replace if necessary
Fuel filter	Change	300 hr		At the very least, depending upon fuel contamination.
Fuel filter	Replace	300 hr		at latest every 300 operating hours
Oil screen	Clean	500 hr		generators with EA300 engines
Oil screen (EA300)	Clean	500 hr		Follow instructions in engine manual
Fuses	Replace	2000 hr
Coolant anti-freeze protection	Check		24 mo	Anti-freeze protection should not be older than 2 years; content 40% to 60%
Hoses and rubber parts	Inspect		12 mo	Renew once a year if necessary.
Hoses and rubber parts	Replace		12 mo	In some operating situations hoses must be renewed once a year.
PMGi heat sink and fan	Clean		6 mo	Visual inspect heat sinks and clean with compressed air every 6 months.
Servo motor trapezoid thread-spindle	Lubricate		1 mo	once a month
Starter battery	Check		2 mo	charge at least every 2 months

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

Type	Item	Value	Unit	Condition
Clearance	V-belt tension	approx. 10	mm	press
Other	Anti-freeze content in cooling water circuit	40 % to 60 %	%
Other	Lubrication oil capacity	1,3	l
Other	Lubrication oil capacity	2,8	l
Other	Maximum pre-glow time	20	sec
Other	Permissible max. permanent tilt of engine	a) 20° gegen die Motorachse; b) 20° in der Motorachse	°
Other	Pre-glow time	20	s	maximum; at 20 °C or more about 5-6 s
Other	Pre-glow time at 20°C or more	about 5-6	sec
Other	V-belt tension	10	mm	able to press V-belt about approx. 10 mm
Pressure	Expansion tank pressure relief valve	500 mbar	mbar
Pressure	Max. exhaust back pressure	9,3	kPa
Pressure	Max. exhaust back pressure	9.3 kPa / 93 Millimbar	kPa / mbar	max.
Resistance	Capacitor discharge reactor	5-10	kOhm
Speed	Idle running speed	2900	rpm
Speed	Idle running speed	3120	rpm
Speed	Rated speed	3000	rpm
Temperature	Coolant/antifreeze mixture	at least -15 °C (5 °F)	°C / °F	recommended
Temperature	Cooling water in-flow and return temperature difference	approx. 2-3 °C	°C	at nominal rating
Temperature	Cooling water temperature difference	10	degrees	between cooling water in-flow and return flow
Temperature	Cooling water temperature difference between in-flow and return	approximately 10	degrees
Temperature	Cylinder head temperature fault threshold	95	°C	5000i marine, delay 5 s
Temperature	Cylinder head temperature warning threshold	85	°C	5000i marine, delay 5 s
Temperature	Exhaust manifold temperature fault threshold	75	°C	5000i marine, delay 1 s
Temperature	Exhaust manifold temperature warning threshold	70	°C	5000i marine, delay 1 s
Temperature	Inverter circuit board temperature switch-off	75	°C
Temperature	Winding temperature fault threshold	135	°C	5000i marine, delay 5 s
Temperature	Winding temperature warning threshold	130	°C	5000i marine, delay 5 s
Torque	Cylinder head nut	42	Nm
Torque	Cylinder head nut	58,8 - 63,7	Nm
Torque	Cylinder head torque	58,8 - 63,7	Nm
Torque	Fixing nut for overflow oil line	19.6 to 24.5	Nm
Torque	Glow plug	7.8 to 14.7	Nm
Torque	Injection line union nut	24.5 to 34.3	Nm
Torque	Max tightening torque for connecting bolts	1.2	Nm
Torque	Nozzle holder assembly	49.0 to 68.6	Nm
Valve clearance	Valve clearance	0,16 - 0,20	mm	engine cold
Valve clearance	Valve clearance	0,2	mm	engine cold
Valve clearance	Valve clearance (engine cold)	in:0.15 ; ex:0.15		engine cold
Voltage	Ground insulation test	50	mV	maximum; generator running with all on-board electrical devices off
Voltage	Insulation test voltage between generator housing and AC-Control box/ground	must not exceed 50	mV
Voltage	Isolation test measured voltage	must not exceed 50 mV	mV	between generator housing and AC-Control box/ground
Voltage	Starter battery voltage high warning threshold	15	V	all generator types, delay 5 s
Voltage	Starter battery voltage low fault threshold	10.8	V	all generator types, delay 30 s
Voltage	Starter battery voltage low warning threshold	11.8	V	all generator types, delay 30 s

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

Fluid	Grade	Standard	Ambient	Capacity	Notes
Coolant	GLYSANTIN PROTECT PLUS / G48				Water/antifreeze mixture: 70:30 = -20°C; 65:35 = -25°C; 60:40 = -30°C; 55:45 = -35°C; 50:50 = -40°C. Antifreeze must be suitable for aluminium.
Engine oil	SAE 15W-40 ACEA A3/B3	ACEA A3/B3		2.1 l	Full mineral engine oil; Fischer Panda recommend Castrol GTX.
Engine oil	SAE10W or 10W-30		below 5°C		For temperatures under 5°C.
Engine oil	SAE10W or SAE10W-30 / SAE10W-40	API CF	below 0°C	1.3 l	For temperatures below 0°C.
Engine oil	SAE10W or SAE10W-30; SAE10W-40	API CF	below 0°C		below 0 °C
Engine oil	SAE20 or SAE10W-30 / SAE10W-40	API CF	0°C to 25°C	1.3 l	For temperatures 0°C to 25°C.
Engine oil	SAE20 or SAE10W-30; SAE10W-40	API CF	0°C to 25°C		0 °C to 25 °C
Engine oil	SAE20		5°C to 20°C		For temperatures between 5°C and 20°C.
Engine oil	SAE30		above 20°C		For temperatures over 20°C.
Engine oil	SAE30 or SAE10W-30 / SAE10W-40	API CF	above 25°C	1.3 l	For temperatures over 25°C.
Engine oil	SAE30 or SAE10W-30; SAE10W-40	API CF	above 25°C		over 25 °C
Fuel	Diesel fuel oil	DIN590:1999 or better; DIN590:2009 or better for common rail or particle filter			Do not use alternative fuel; kerosene adversely affects engine
Fuel	No. 2 Diesel fuel oil	ASTM D975 and EN 590; SAE J313 JUN87			Do not use alternative fuel or kerosene.
Fuel	clean No. 2 Diesel fuel oil	SAE J313 JUN87; ASTM D975; EN 590
Grease	Antiseize				Heat resistant grease for sight glass O-ring
Grease	acid-free and acid-resistant grease				battery terminals
Other	glycerin or non-mineral oil based lubricant e.g. silicone spray				impeller lubrication

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

Code	Name	Meaning	Severity	Action
5	Starting failed	Display: STARTING FAILS / STARTABBRUCH	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
9	Watchdog Error	Display: WATCHDOG / WATCHDOG	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
12	Winding temperature fault	Display: FAULT: WINDING / TEMP. WICKLUNG	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
13	Winding temperature out of range	Display: OUT: WINDING / OUT: WICKLUNG	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
14	Exhaust temperature fault	Display: FAULT: EXHAUST / TEMP. ABGAS	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
15	Exhaust temperature out of range	Display: OUT: EXHAUST / OUT: ABGAS	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
16	Engine temperature fault	Display: FAULT: CYL.HEAD / TEMP. MOTOR	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
17	Oil pressure fault	Display: FAULT: OILPRESS / FEHLER: OELDRUCK	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
18	Battery voltage low	Display: BATTERY LOW / BATTERIE ENTLADEN	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
22	Emergency stop	Display: EMERGENCY STOP! / NOT-HALT!	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
23	Engine temperature out of range	Display: OUT: CYL.HEAD / OUT: MOTOR	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
30	Inverter overtemp	Display: Inverter overtemp / Inverter Uebertemp.	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
31	inverter overload	Display: Inverter overload / Inverter Ueberlast	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
32	inverter communication lost	Display: Inverter com. lost / Inverter Kom. defekt	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
33	inverter synchronisation lost	Display: INV. SYNC. FAILED / INV. SYNC. FEHLER	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
34	Engine fault (EDC)	Display: ENGINE FAULT / MOTOR FEHLER	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
35	CAN communication lost	Display: CAN. COMM.LOST / CAN KOMM. FEHLER	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
36	inverter overload slave 1	Display: L1 OVERLOAD / L1 UEBERLAST	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
37	inverter overload slave 2	Display: L2 OVERLOAD / L2 UEBERLAST	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
38	inverter overload slave 3	Display: L3 OVERLOAD / L3 UEBERLAST	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
39	inverter overload slave DC	Display: DC OVERLOAD / DC UEBERLAST	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
40	Overvoltage	Display: FAULT: OVERVOLTAGE / Fehler: Ueberspg.	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
41	Undervoltage	Display: FAULT: LOWVOLTAGE / Fehler: Unterspg.	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
42	DC-Overvoltage	Display: DC OVERVOLTAGE / DC UEBERSPG.	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
66	RedundantTempSwitchOff	Display: NOTSTOP! / NOTSTOPP!	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.
100	Communication Error	Display: NO CONNECTION / BUS ERROR! / KEINE VERBINDUNG / BUS FEHLER!	Shutdown	Secure generator, check plug-in connections and cables for firm seating or damage; acknowledge with Start/Stop button after connection is restored.
207	Init failed (no generator type is selected)	Display: INIT FAILED! / INIT FAILED!	Shutdown	Acknowledge with Start/Stop button; controller returns to stand-by mode.

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

Procedures

Ground insulation test diagnostic

⚠ Electrical installation by qualified electrician only.

Tools: voltmeter (AC)

Switch off all on-board electrical devices.
Start generator.
Measure AC voltage between generator housing and AC-Control box.
Measure AC voltage between generator housing and ground.
Measured voltage must not exceed 50 mV.
Test RCD if installed.

Connection of the starter battery block installation

⚠ Wrong battery connection can cause short-circuit and fire.

⚠ Battery negative may not be connected to boat ground or protective grounding of 120 V installation.

Install separate starter battery for generator.
Attach positive cable directly at starter solenoid switch.
Attach negative cable underneath starter motor at engine mount.
Install fuse and battery circuit breaker in positive cable within 300 mm of battery.
Connect cables first at generator, then at battery.
Ensure battery voltage matches start system voltage.

First filling and ventilation of the internal cooling water circuit installation

⚠ Risk of scalding; expansion tank pressure relief valve 500 mbar.

Fill external cooling water expansion tank with coolant to max marking; open cover temporarily.
Start water pump using Prime Fuel option in iControl panel.
Open venting screw at thermostat housing; close when air-free water comes out.
Start generator; do not load; switch off after approx. 10 seconds.
Repeat steps 1-4 until no more air comes out; close venting screws.
Run generator at idle until cooling water temperature at engine reaches 60°C; stop; fill expansion tank to max; close.
Re-ventilate 10 operating hours after first start-up and if necessary.

Insulation test installation

Tools: voltmeter

Switch off all on-board electrical devices.
Start generator.
Measure AC voltage between generator housing and AC-Control box, and between generator housing and ground.
Measured voltage must not exceed 50 mV.
Check safety systems and RCD if installed.
Check all electrical devices are connected to common ground.

Isolation test installation

Tools: Voltmeter

Switch off all electrical load.
Start generator.
Measure AC voltage with voltmeter between generator housing and AC-Control box, and generator housing and ground.
Measured voltage must not exceed 50 mV.
Check safety systems; test RCD if installed; check phases against each other and ground.

Ventilating air from fuel system at first operation installation

⚠ Catch fuel with cloth or absorbent paper.

Tools: cloth or absorbent paper

Switch main power switch on control panel ON.
Push and hold failure bypass switch.
Run electric fuel pump audibly for 3 to 4 minutes.
Unscrew bleeding screw of solenoid valve while holding switch.
Close screw when fuel runs out without bubbles.
Release failure bypass switch.
Start generator with START button.

Check and discharge the capacitors maintenance

⚠ Charged capacitors can be lethal; do not touch bare contacts.

Tools: Multimeter with capacitor measuring, Discharge reactor 5-10 kOhm, Insulated pliers/screwdriver

Never check capacitors while generator motor is running.
Disconnect terminal lead wires using insulated pliers or screwdriver.
Discharge capacitors by bridging terminals with discharge reactor.
For three-phase capacitors discharge between every phase.
Measure capacity with multimeter set to capacitor measuring.

Checking battery maintenance

⚠ Battery gases are explosive; keep sparks and flames away.

Tools: hydrometer

Keep battery clean and dry.
Remove dirty clamps; clean terminal posts and clamps.
Grease terminals with acid-free and acid-resistant grease.
Check electrolyte level: 10-15 mm above top of plates.
Top up with distilled water if necessary.
Measure electrolyte density with hydrometer at about 20°C.

Checking oil level maintenance

⚠ Burn hazard: generator and coolant can be hot.

Tools: paper towels or cloth, oil dipstick

Place generator or vessel level.
Run generator about 10 minutes to warm engine.
Wait 3 minutes for oil to drain back.
Assure generator against accidental start and open casing.
Pull out oil dipstick and clean it.
Insert dipstick, wait 10 seconds, pull out and read level.
Refill if level is below 1/3; ideal level is 2/3 between min and max.

Checking oil-level maintenance

⚠ Burn hazard; generator and coolant can be hot

Tools: paper towels / cloth

Place generator level.
Run generator about 10 minutes to warm engine.
Wait 3 minutes for oil to flow back.
Assure generator against accidental start.
Open generator casing.
Pull and clean oil dipstick.
Reinsert dipstick and wait 10 seconds.
Pull dipstick and read oil-level.

Clean raw water filter maintenance

Close water cock.
Release raw water filter.
Beat filter basket to remove debris.
If water seeps through cover, check sealing ring between caps and filter holder.

Cleaning raw water filter maintenance

⚠ Do not seal leaking cover with adhesive or sealant.

Close water cock.
Release raw water filter.
Beat filter basket to remove debris.
If water seeps through cover, check sealing ring.
Replace sealing ring between cap and filter holder if necessary.

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

Voltage	Phase	Connection	Leads	Notes
		Fischer Panda CAN bus 6-pin jack	1 UBUS; 2 GND; 3 REIZ; 4 CAN-L; 5 CAN-H; 6 UBAT
		Fischer Panda standard bus 6-pin jack	1 UBUS; 2 GND; 3 REIZ; 4 DATA+; 5 DATA-; 6 UBAT
		Panda iControl2 controller 18-pin connector	1 Actuator (optional); 2 Cylinder head temperature; 3 Exhaust manifold temperature; 4 Winding temperature; 5 Reserve temperature; 6 Oil pressure; 7 Emergency stop; 8 GND temperature sensors; 9 GND; 10 Actuator (optional); 11 +5V servo motor (red wire); 12 PWM servo motor (yellow wire); 13 Booster (optional); 14 Fuel pump; 15 Fuel pump; 16 Electric starter; 17 Electric starter; 18 Electric starter
		Panda iControl2 panel 7-pin Phoenix jack	1 UBUS white (WH); 2 GND brown + shielding (BN); 3 REIZ green (GN); 4 DATA-A pink (PK); 5 DATA-B grey (GY); 6 UBATT; 7 USTART/STOPP	A jumper between terminal 6 and 7 closes the autostart contact.
		wire 1 and wire 3	1, 3	Both partial windings must be connected for the 60 Hz version
120 V		L1/L2/L3/N & 1/2/4		Terminals for the 60 Hz (120 V) models
230 V		L1/L2/L3/L1'/N		Terminals for the 230 V - 50 Hz model
230 V / 50 Hz	single phase	PMGi out Socket 1	1 Ground (green/yellow); 2 Live (brown); 3 Neutral (blue)	Connecting the Phase with the earth pin will destroy the PMGi.

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

15694-65992 FridayParts $18.58 15694-65990 Amazon eBay $15.01 FridayParts $18.58 S81NL FridayParts $18.58 SN1NL FridayParts $18.58 14971-26280 FridayParts $52.00 14971-23450 FridayParts $90.88 1G111-51012 FridayParts $297.80 15442-21050 FridayParts $18.50 1523143560 KuduParts $8.00 FridayParts $8.19 1T02143560 Amazon eBay $9.25 KuduParts $8.00 FridayParts $8.19 1523143562 KuduParts $8.00 FridayParts $8.19 1430112470 KuduParts $8.00 1523143563 KuduParts $8.00 1G31343560 KuduParts $8.00 6683039 KuduParts $8.00 KB1T02143560 KuduParts $8.00 KB1523143560 KuduParts $8.00 15371-12310 FridayParts $159.99 QQ5086-01846 SA-4805-12 FridayParts $82.12 1753es FridayParts $63.50 SinoCMP $79.00 12e6uc4b1s1cc43 FP-XP-0022421 OC60 FridayParts $37.50 KC70 FridayParts $257.99 094500-6630 FridayParts $257.99 1G131-51012 FridayParts $257.99 1g131 FP-XP-0013198 2D66 FridayParts $49.99 15241-03311 FridayParts $49.99 FP-XP-0017877 4Pcs FridayParts $7.88 SinoCMP $25.90 1J194-53900 FridayParts $547.89 1j194 FP-XP-0002317 11420-53002 FridayParts $37.50 1G141-53000 1g141 FP-XP-0001939 EG561-68900 FridayParts $47.00 EG561-68910 FridayParts $82.16 EG561-68920 FridayParts $120.99 eg561 FP-XP-0042906 129700-4850 129700-4860 FridayParts $49.90 129700-4870 FridayParts $49.90 FP-XP-0042905 0154-12B8LS1 FridayParts $75.00 8154-1000 FridayParts $75.00 12b8ls1 FP-XP-0036366 FP-XP-0024255 ET110 FridayParts $49.99 11030-90161 FridayParts $49.99 FP-XP-0018110 SA-4828-12 FridayParts $114.45 SinoCMP $129.00 0175-12A6LS FridayParts $114.45 SinoCMP $129.00 12a6ls SinoCMP $129.00

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

Common questions

What is the oil capacity of the Kubota EA300?

The Kubota EA300 engine has an oil capacity of 1.3 liters.

What is the displacement of the Kubota EA300?

The Kubota EA300 has a displacement of 0.309 liters with 1 cylinders.

Which generators use the Kubota EA300 engine?

The Kubota EA300 powers 4 generator set(s), including Fischer Panda 4000i, Fischer Panda 5000i PMS, Fischer Panda Panda 5000i PMS, Fischer Panda Panda 5K PMS.

How often should you change the oil in the Kubota EA300?

The Kubota EA300 oil change interval is every 85 hours.