why not diesel??

[traks44]

Just sittin here thinkin today how cool it would be to have a cummins light duty truck engine in a jetboat like a 12V or a 24V, something along those lines. The only reason I could come up with is the weight issue, but there are alot of companies who use those Gimungus V-8s that weight very close to the same such as the 8.1L chevy. I mean a diesel makes all its power in the low RPM range(up on step quicker?), gets alot better mileage, has tons of power with the ability to tune and make monster power. I know there must be some good reason why they dont use'um?

school me?

[GSD]

"Our jet boats are custom built and powered by 460 Ford marine and Yanmar diesel engines and Hamilton Jet pumps."

Quote from a Hells Canyon Jetboat tour company.

So, I guess someone has already done it.

Yanmar makes diesel outboards too.

William

[WaterDog]

Cummins 4.2L 320hp, 477 ft-lbs, engine weight is about 1000lbs. Cost is about $12,500 more than a GM 8.1L.
http://www.fototime.com/6D1C485B21EDCA8/standard.jpg

Yanmar makes a 315hp diesel that is about $10,000 more than the 8.1L and weighs in at about same (900lbs). Not sure how outdrives work but you may need to go to a larger drive because of the diesel so there is other costs as well.

We are finishing a 24’ jetboat that is yanmar powered and will be starting one with the Cummins mentioned. Total upgrade cost to go to a diesel setup is around $17,000 (engine and upgraded pump). Fuel burn is about 5.5 g/h or about half of the 8.1L.

[traks44]

OH MAN!!!

Thanks fellas, that is what I am lookin for, all I can say is wow!!!!!!

[WaterDog]

Just to put it in perspective , speaking strictly to jetboats, these engines are going in boats that price out in the $80K to $95K range and higher. This is some serious equipment.