[Lucky Dog 33]

Toying with the idea of converting from original 1989 crusaders to diesels. The gassers I have now are original with approx 2200hrs. Motors run ok, but this new to me boat I just don’t trust them. My original plan was to pull them this winter and rebuild them and replace all components (manifolds, risers, water pumps, etc). However with the price of fuel not going down anytime on site and the current fuel burn of estimated 35-38/gph, I’m considering replacing with cummins 6bta 330s. 

I’ve been searching everywhere including boat diesel and Sbmar, but figured I’d post here for a more Tiara perspective. Has anyone every done the conversion? 

Will the existing side exhausts and 1.5” shafts be sufficient?

Can I reuse the 295gal fuel tank? It was replaced at some point in the past. I’d have to dig they receipts to find out exactly when. 


Any crazy modifications needed to mount the motors to stringers?

I would think it should be a fairly easy swap being the 6bta was an option. 

Any info would greatly be appreciated.