Yanmar 4TNV84T Engine

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Shared across brands: Himoinsa, Kohler

How to read your Yanmar engine serial & model number →

• Warning fault operates
  Fix: Check relevant switch and wiring of fault indicated on LCD display. Check configuration of input.
• Unstable voltage either on no-load or with load.
  Fix: Check speed stability.; Check stability setting.
• Unit shuts down
  Fix: Check DC supply voltage is not above 35 Volts or below 9 Volts; Check the operating temperature is not above 70 °C. Check the DC fuse.
• Unit locks out on Emergency Stop
  Fix: If an Emergency Stop Switch is not fitted, ensure that a positive is connected to the Emergency Stop input. Check emergency stop switch is functioning correctly. Check Wiring is not open circuit.
• Unit is inoperative
  Fix: Check the battery and wiring to the unit. Check the DC supply. Check the DC fuse.
• Starter motor inoperative
  Fix: Check wiring to starter solenoid. Check battery supply. Check battery supply is present on the Starter output of module. Ensure that the Emergency Stop input is at Positive.
• Shutdown fault operates
  Fix: Check relevant switch and wiring of fault indicated on LCD display. Check configuration of input.
• Pre-heat inoperative
  Fix: Check wiring to engine heater plugs. Check battery supply. Check battery supply is present on the Pre-heat output of module. Check pre-heat has been selected in your configuration.
• No voltage build-up when starting set.
  Fix: Check speed; Check residual voltage.; Follow Separate Excitation Test Procedure to check generator and AVR.
• Low voltage, no load.
  Fix: Check speed.; Check link 1-2 or external hand trimmer leads for continuity.
• Low voltage on load.
  Fix: Check speed.; Check UFRO setting.; Follow Separate Excitation Procedure to check generator and AVR.
• Low oil Pressure fault operates after engine has fired
  Fix: Check engine oil pressure. Check oil pressure switch/sender and wiring. Check configured polarity (if applicable) is correct (i.e. Normally Open or Normally Closed) or that sender is compatible with the 5310 Module and is correctly configured.
• Intermittent Magnetic Pick-up sensor fault
  Fix: Ensure that Magnetic pick-up screen is only connected at one end, if connected at both ends, this enables the screen to act as an aerial and will pick up random voltages.
• Incorrect reading on Engine gauges
  Fix: Check engine is operating correctly. Check sender and wiring paying particular attention to the wiring to terminal 47 (refer to appendix). Check that sender is compatible with the 5310 Module and is correctly configured.
• High voltage either on no-load or with load.
  Fix: Check speed.; Check that generator load is not capacitive (leading power factor).

Compiled from service & troubleshooting documentation across every generator set that uses the Yanmar 4TNV84T.

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

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

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

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

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.

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

• Air filter: Donaldson P772578 Donaldson P775298 Wix 42801 Baldwin PA1681-FN Wix 49592
• Fuel filter: Himoinsa 3031131 Yanmar 12910055650 Yanmar 11900055602 Yanmar 12947055701 Donaldson P502161 Donaldson P550048 Donaldson P550127 Wix 33507
• Oil filter: Himoinsa 3031130 Yanmar 12915035170 Donaldson P550162 Wix 51334 Ac Delco X45 Baldwin B179

Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.

• Landini MISTRAL 55 — Tractor
• Mccormick GM45 — Tractor
• Mccormick GM55 — Tractor
• Mccormick GX55-H — Tractor
• Mustang 2044 — Skid Steer Loader
• New Holland T3020 — Tractor
• New Holland T3040 — Tractor

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.