Yanmar 3QM30 Marine Inboard Diesel Engine 30HP
$7,088.00
- Description
Description
Yanmar 3QM30 Marine Inboard Diesel Engine 30HP
The Yanmar 3QM30 30HP marine inboard diesel engine is a three-cylinder, 1.642-litre marine diesel for auxiliary propulsion and replacement-engine projects. MSS Motorsports UG offers this Yanmar QM Series model to buyers assessing an engine for a sailboat or displacement vessel.
For owners replacing an existing 3QM30, this model provides a starting point for checking the original installation against the proposed replacement. Contact us for current availability, engine condition and a quotation covering the equipment your project requires.
Yanmar QM Series Propulsion
The Yanmar 3QM30 30HP uses indirect fuel injection with a swirl pre-combustion chamber. Its published ratings distinguish between sustained operation and short-duration output: 30 HP at 2,600 rpm continuously, with a separate 33 HP at 2,800 rpm one-hour rating.
These figures help your installer assess the engine against the vessel’s operating requirements. Propeller selection, gearbox ratio and hull resistance determine how effectively the installed package can use that power.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Yanmar |
| Engine model | 3QM30 |
| Engine family | Yanmar QM Series |
| Configuration | Three-cylinder, four-stroke diesel |
| Displacement | 1.642 litres / 1,642 cc |
| Bore × stroke | 88 × 90 mm |
| Continuous output | 30 HP at 2,600 rpm |
| One-hour output | 33 HP at 2,800 rpm |
| Combustion system | Indirect injection; swirl pre-combustion chamber |
| Standard cooling arrangement | Direct seawater cooling |
| Starting arrangement | Electric and/or manual, depending on configuration |
| Application | Marine inboard propulsion |
| Condition, hours and supplied gearbox | Confirm for the actual unit offered |
Historical model specifications are provided for reference. Confirm the exact engine variant, installed cooling system and supplied equipment before ordering. Piston
The Yanmar 2QM20/3QM30 service manual covers the engine family and its original specifications.
Cooling Configuration and Maintenance
The standard Yanmar 3QM30 30HP uses direct seawater cooling. Related freshwater-cooled variants and engines fitted with conversion systems require different installation and service considerations.
When assessing a replacement, review the cooling passages, seawater pump, thermostat, exhaust arrangement and sacrificial anodes. Confirming the actual cooling configuration helps identify which existing connections can be retained and which components need attention.
Sailboat Repower and Gearbox Matching
For a Yanmar 3QM30 30HP replacement engine, compare mounting positions, engine-bed dimensions, shaft alignment, coupling, exhaust routing and access for routine servicing.
If you plan to retain your existing marine transmission, provide its model, reduction ratio and identification-plate photograph. For an engine and gearbox package, specify the required ratio and shaft arrangement so the proposed combination can be identified in the quotation.
Owners comparing another three-cylinder Yanmar option can review the Yanmar 3HM35F freshwater-cooled marine diesel engine. Installation suitability should be assessed separately for each model.
Engine Condition and Package Details
For this earlier-generation engine, request the serial number, recorded operating hours and any available service, inspection or refurbishment records. Where available, running-test information can help your installer assess the proposed unit.
The written quotation should confirm whether the supply includes a gearbox, instrument panel, wiring, mounts and installation accessories. It should also identify any applicable warranty, its provider and coverage terms.
Frequently Asked Questions
Is 30HP the maximum output of the Yanmar 3QM30?
The historical service manual lists 30 HP at 2,600 rpm as continuous output and 33 HP at 2,800 rpm as the one-hour rating.
Is the 3QM30 freshwater-cooled?
The standard model uses direct seawater cooling. Confirm the full model designation and inspect the offered engine for any cooling-system conversion.
Does the engine include a gearbox?
The quotation must confirm this. Include your required gearbox ratio and state whether you need an engine-only supply or an engine-and-gearbox package.
Request a Yanmar 3QM30 Quotation
Request Yanmar 3QM30 pricing and availability from MSS Motorsports UG. Include your vessel’s make and model, current engine and gearbox details, required reduction ratio and preferred package.
Provide how soon you intend to purchase, together with your billing and delivery addresses, for an official quotation covering the proposed engine, included equipment and delivery costs.