suzuki DF140

[uhu]

i live in hawaii and i have a 25' glass catamaran with twin suzuki DF140's. they both have stainless steel props. about a month ago i ran a reef going about 1-3 knots. the motors used to push at full throttle 5100-5200 rpm and 30 knots. after running the reef the motors only push 4700-4800 rpm and 22 knots. there are no "visible" signs of prop damage but between 2500-4000 rpm there is vibration going on that wasn't there before the incident. i should just balance the props but if that's not the cause then i don't have to waste alot of money balancing the props. could a bent prop be the cause? thanks

 

[walleyehed]

Re: suzuki DF140

If you have a bent blade making one engine inefficent, it's going to make the other try to make up the difference.
I would pull BOTH props and have them trued-up together.

 

[hao]

Re: suzuki DF140

"trued-up together"-meaning get them both balanced?

 

[walleyehed]

Re: suzuki DF140

They will set each prop back in the pitch blocks it was designed for, heat them and reshape back to ORIGINAL specs...If they do both, they should match-up better in the end.