Tranona
Well-known member
Not the case here. The 4 236 is exactly the right engine for the boat and unlike the higher revving smaller capacity engines it produces its power lower down. 1200rpm (out of its 2600) is around half power so it is properly loaded at cruising speed. More modern higher revving engines (3000-3600 range) usually produce 50% power at 65-70% revs, particularly if turbocharged as the equivalent HP Volvo and Yanmar models.It is said that diesel engines like it better when they are worked hard, i.e. a smaller engine that has to be run at higher revs is likely to be more reliable than one that spends its working life at running at barely above tickover.