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Mitsubishi CM4.33 Engine

Name: Mitsubishi CM4.33 Engine
Brand: Mitsubishi

The Mitsubishi CM4.33 is a 1.5 L idi (indirect) engine rated at 3000 rpm, producing up to 24.3 kW. It powers generator sets from Craftsman Marine.

Also known as: Mitsubishi CM4.33

1.5 L

Displacement

3000 rpm

Rated speed

24 kW

Gross power

On this pageSpecs Generator sets Maintenance FAQ

Engine specifications

Displacement	1.5 L
Aspiration	IDI (indirect)
Rated speed	3000 rpm
Gross power	24 kW

Generator sets powered by this engine

Craftsman Marine CM4.33

How to read your Mitsubishi engine serial & model number →

Common problems

Starter motor does neither rotate nor engage
Cause: Defective or discharged battery, Burnt fuse, Loose or corroded connections in the starter circuit, Defective starter switch or relay, Defective starter motor or pinion does not engage, Starter relay not activated owing to insufficient voltage, on account of a too long cable from engine to instrument panel, Jammed components
Fix: Check battery/charge or replace and check alternator for proper functioning, Replace, Clean and tighten the connections, Replace defective component, Replace starter motor Fit an auxiliary starter relay
Oil level too low
Fix: Top up / Replace
Oil level too high
Fix: Lower oil level
Insufficient supply of combustion air
Fix: Check air inlet and ventilation openings in engine room
Incorrect SAE-specification or quality of lubrication oil
Fix: Replace by good quality engine lubricating oil
Fuel filter clogged up by water and/or dirt
Fix: Check / replace
Filter of electrical fuel lift pump clogged
Fix: Check / replace
Excessive wear and tear to cylinder or piston
Fix: Check compression; overhaul engine, if needed
Excessive inclination angle of engine
Fix: Check / adjust alignment
Engine becomes overheated
Cause: Level of cooling liquid too low, Raw water seacock closed
Defective oil filter
Fix: Check / clean or replace if necessary
Defective injector / injection pump
Fix: Check / replace
Defective electrical fuel lift pump
Fix: Replace defective component

Compiled from service & troubleshooting documentation across every generator set that uses the Mitsubishi CM4.33.

Maintenance schedule

Item	Spec	Capacity	Part #	Interval
Air filter	cooling water strainer		—
Fuel filter			—	100 hr
Oil filter			—	1000 hr
Battery			—
Belt	V-belt		—
Coolant	40% ethylene-glycol, 60% clean tap water	6.5 liters	—
Oil	15W40	6.5 litres	—	10 hr
Spark plug			—

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

Common questions

What is the displacement of the Mitsubishi CM4.33?

The Mitsubishi CM4.33 has a displacement of 1.5 liters.

Which generators use the Mitsubishi CM4.33 engine?

The Mitsubishi CM4.33 powers 1 generator set(s), including Craftsman Marine CM4.33.

How often should you change the oil in the Mitsubishi CM4.33?

The Mitsubishi CM4.33 oil change interval is every 10 hours.

What is a common problem with the Mitsubishi CM4.33 engine?

A commonly reported issue on generators using the Mitsubishi CM4.33 is: Starter motor does neither rotate nor engage. Cause: Defective or discharged battery, Burnt fuse, Loose or corroded connections in the starter circuit, Defective starter switch or relay, Defective starter motor or pinion does not engage, Starter relay not activated owing to insufficient voltage, on account of a too long cable from engine to instrument panel, Jammed components. Fix: Check battery/charge or replace and check alternator for proper functioning, Replace, Clean and tighten the connections, Replace defective component, Replace starter motor Fit an auxiliary starter relay.