Yanmar 6AYM-WGT Marine Inboard Diesel Engine 720hp
$76,098.00
- Description
Description
Yanmar 6AYM-WGT Marine Inboard Diesel Engine
The Yanmar 6AYM-WGT marine inboard diesel engine combines a 20.379-litre inline six-cylinder platform with mechanical engine control, direct fuel injection, turbocharging and intercooling. Yanmar publishes this model at 670 kW / 911 MHP at 1,938 rpm in L-rating. yanmar.com
Rating clarification: This product is advertised as 720HP, but that output has not been verified for the offered unit. The specifications below describe Yanmar’s published 6AYM-WGT configuration. Request the engine nameplate, serial number and supporting rating documentation with your quotation.
Looking for a Yanmar 6AYM-WGT for sale? Contact MSS Motorsports UG for current availability, engine condition and package pricing. Specify whether your project requires an engine-only replacement or an engine with marine gearbox and installation equipment.
Mechanical Marine Diesel Power
The factory-documented 6AYM-WGT offers:
- Mechanical engine control: A mechanically controlled propulsion platform.
- Direct fuel injection: Fuel is injected directly into the combustion chambers.
- Turbocharging and intercooling: Combines intake-air boost with a seawater-cooled air cooler.
- Long-stroke configuration: A 155 mm bore and 180 mm stroke across six inline cylinders.
- Heat-exchanger cooling: Manufacturer documentation also identifies optional keel cooling. yanmar.com
These features provide a starting point for a vessel repower assessment. Match the selected engine rating to the hull, propeller demand and intended operating pattern.
Technical Specifications
| Specification | Published Manufacturer Data |
|---|---|
| Manufacturer | Yanmar |
| Engine model | 6AYM-WGT |
| Configuration | Inline six-cylinder, four-stroke diesel |
| Displacement | 20.379 litres |
| Bore × stroke | 155 × 180 mm |
| Published rated output | 670 kW / 911 MHP |
| Rated engine speed | 1,938 rpm |
| Duty classification | L-rating |
| Fuel system | Direct injection |
| Engine control | Mechanical |
| Aspiration | Turbocharged and intercooled |
| Cooling | Heat exchanger; optional keel cooling |
| Starting | 24V electric; confirm fitted configuration |
| Flywheel housing / flywheel | SAE #0 / 18-inch |
| Published dry mass without marine gear | 2,365 kg |
Specification note: Confirm the offered unit’s configuration, documented output and equipment before using these reference figures for installation or transport planning. yanmar.com
Review the official Yanmar 6AYM-WGT brochure for manufacturer specifications, performance information and rating definitions.
Understand the L-Rating
Yanmar’s brochure defines this L-rating for applications where rated power is used for less than two continuous hours in every five hours, with annual operation below 2,000 hours. yanmar.com
Assess the vessel’s expected running hours and load profile against that definition. If your operation requires a different duty, compare the available Yanmar 6AY marine engine options and confirm the appropriate rating.
Yanmar Marine Gearbox and Shaft Integration
Yanmar identifies the YXH-240 hydraulic multi-disc marine gearbox for the 6AYM-WGT. Published ahead reduction ratios include 1.95:1, 2.27:1, 2.56:1, 3.03:1 and 3.48:1. yanmar.com
The correct gearbox and ratio depend on the vessel, shaft arrangement and propeller calculation. Confirm inclusion of the transmission, coupling and required rotation in the quotation.
For a repower, provide details of the existing engine and gearbox. Your installer should review engine-bed loading, alignment, cooling capacity, exhaust routing, controls and service access using drawings for the exact proposed package.
Engine Condition, Package Contents and Warranty
An itemised Yanmar 6AYM-WGT price quotation should identify the engine’s condition, serial number, recorded hours and available service or test records.
Confirm whether the supply includes a gearbox, instrument panel, controls, wiring, mounts and exhaust equipment. Any reconditioning claim should be supported by a description of the work completed.
Request written warranty terms identifying the provider, coverage period, exclusions and claim procedure. Include packing, freight charges, estimated dispatch timing and delivery terms when comparing the total supply cost.
Frequently Asked Questions
Is the 6AYM-WGT factory-rated at 720HP?
The Yanmar documentation reviewed specifies 670 kW / 911 MHP in L-rating. The advertised 720HP figure requires documentation for the specific unit offered. yanmar.com
Does the published L-rating allow unrestricted operation at rated power?
Yanmar’s brochure sets limits on rated-power use and annual operating hours. Match the intended operating profile to those limits.
Is the marine gearbox included?
Confirm this in the written quotation. Specify the gearbox model, required reduction ratio and rotation.
Request Your Yanmar 6AYM-WGT Quote
Request Yanmar 6AYM-WGT pricing and availability from MSS Motorsports UG for a quotation matched to your vessel and propulsion requirements.
Include your boat make and model, existing engine and transmission, expected annual hours, operating duty, required gearbox ratio, preferred package, how soon you plan to purchase, and billing and delivery addresses. Request confirmation of the offered engine’s documented power rating.