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Yamaha EH65D Engine

The Yamaha EH65D is a 653 L 2-cylinder engine. It powers generator sets from Yamaha, including the EF12000DE. It holds 1.55 L (0.4 gal) of oil.

Also known as: Yamaha EH65D

653.0 L

Displacement

Cylinders

1.55 L

Oil capacity

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

Engine specifications

Oil capacity	1.55 L
Displacement	653.0 L
Cylinders	2

Generator sets powered by this engine

Yamaha EF12000DE

Maintenance schedule

Item	Spec	Capacity	Part #	Interval
Oil filter			—	200 hr
Battery	12V		—
Oil	1.55 L (1.36 lmp qt, 1.64 US qt)	1.55 L	—	100 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
Bolts and nuts	Check	8 hr		Daily
Engine oil	Check	8 hr		Refill daily to upper level
Generator	Clean	8 hr		Daily
Engine oil	Change	100 hr		First service — Thereafter
Spark arrester	Clean	100 hr		Every 100 hours
Engine oil filter	Replace	200 hr		First service — Thereafter
Fuel lines	Replace		12 mo	Yearly

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
Torque	Wheel mounting bolts	20 to 25	Nm
Valve clearance	Valve clearance (Intake & Exhaust)	0.0039 ± 0.0008	in	cold
Valve clearance	Valve clearance (Intake & Exhaust)	0.1 ± 0.02	mm	cold

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
Fuel	Automotive Unleaded Gasoline			44.0 L	Fuel tank capacity

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

Procedures

Wheel installation installation

⚠ Place generator on level surface, lock wheel with stopper and/or chock wheels.

Tools: hoist or square bar, plier, spanner or socket wrench (12 mm), 2 units

Raise generator about 100 mm with hoist or square bar under bottom panel.
Attach wheel mounting parts, stopper, clamp, and wheel to wheel shaft.
Check wheel rotates smoothly; use grease if needed.
Bend tip of part ① according to wheel shaft shape.
Attach assembled shaft to engine foundation plate.
Attach other shaft to generating unit foundation plate.

Engine oil change maintenance

Stop engine and loosen drain plug.
Re-install drain plug before refilling oil.
Refer to recommended oil table on page 11.
Use best grade and clean oil.

Engine oil filter replacement maintenance

⚠ Pay attention to spilled hot engine oil.

Initial replacement after 20 hours; thereafter every 200 hours.
Apply oil to O-ring, attach filter, tighten 2/3 turns by hand after O-ring touches sealing surface.
Run engine for a minute, stop, check for oil leakage and recheck oil level.

Preparation for storage maintenance

⚠ NEVER USE WATER TO CLEAN GENERATOR!

Drain fuel from fuel tank and strainer by disconnecting fuel line.
Drain fuel from carburetor by loosening drain screw or run engine at no-load until it stops.
Disconnect battery terminal.
Change engine oil.
Check for loose bolts and screws, tighten if necessary.
Clean generator thoroughly with oiled cloth; spray with preservative if available.
Store generator in well ventilated, low humidity area.

Spark arrester cleaning maintenance

⚠ Muffler and spark arrester are very hot; allow to cool before cleaning.

Tools: brush

Remove flange bolts from muffler cover and remove muffler cover.
Remove special screw from spark arrester and remove spark arrester from muffler.
Use a brush to remove carbon deposits from spark arrester screen.
Be careful to avoid damaging screen. Replace if damaged.
Install spark arrester and muffler protector in reverse order.

Refueling operation

Check fuel level at fuel level gauge.
If fuel level is low, refill with unleaded automotive gasoline.
Be sure the fuel filter screen is inserted.

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

Common questions

What is the oil capacity of the Yamaha EH65D?

The Yamaha EH65D engine has an oil capacity of 1.55 liters.

What is the displacement of the Yamaha EH65D?

The Yamaha EH65D has a displacement of 653.0 liters with 2 cylinders.

Which generators use the Yamaha EH65D engine?

The Yamaha EH65D powers 1 generator set(s), including Yamaha EF12000DE.

How often should you change the oil in the Yamaha EH65D?

The Yamaha EH65D oil change interval is every 100 hours.