Detroit Diesels

[DNT99611]

Talking to my neighbour a few days ago about him re-powering in the near future. He has a 53 foot skookum set up for commercial fishing. Boat has a 3-71. His average over the past 15 years has been 6000 hours on the main. Rebuild about every 30,000 hours. Like he says it will be pretty darn hard to find something better.

 

[Nomad Willy]

Weight

I did mention weight

Indeed you did,

“At certain speed some hulls and less weight makes them use less fuel but within a category there is not much difference and they all are inefficient compared to other means of transport.”

5% more weight = 5% more fuel burn. ect ect ect

 

[FF]

"5% more weight = 5% more fuel burn. ect ect ect"

For displacement boats that may cruise at 3 hp / ton (2240lbs)

adding a ton will only increase the fuel burn by 1/5 of a GPH.

Does it matter, for coastal cruisers?