Pleasure boat engine : in-board diesel engine 100 - 200 hp (indirect injection, natural aspiration)
6LXB (127 hp @ 1500 rpm) Gardner Marine Diesels

This outstanding six cylinder 10.45 litre engine offers the greatest degree of efficiency, durability and refinement.
The specific fuel consumption rate of the engine when directly coupled to the dynamometer is the remarkably low value of 0.330 lb./per b.h.p./hour which represents an overall thermal efficiency of no less than 39.73%. If the engine is operated slightly below maximum torque, it does attain over 40% thermal efficiency.
The engine is designed for use with a fresh water closed circuit heat exchanger or keel cooler system. Coolant is circulated at high rate by a centrifugal pump and temperature is automatically controlled at all loads and speeds from idle to maximum
output.