Hi there, new to the boating world..just bought a very solid 88 larson senza with a 320 EFI matted to a Alpha one drive. I took it out last week for a water test and it ran out great. My one conern was there was a slight rev studder at WOT. This happened several times in a row. The present boat owner is a licenced mechanic and said he would make it right. My fear is this sounds like it might be ECU related? I have been reading much on this forum regarding the 320 EFI but nothing that touches this issue. Can someone advise if this boat is just a big problem waiting to happen or if it should be a good one. Any suggestions on where to start to solve this problem is apprecaited. I love the boat but have 30 days to return it, if I need to..

what kind of money are we talking to fix a ECU for this motor?

thanks

what do you mean by slight rev studder?????????

how may rpm's is the tach showing at WOT ??

Jim

Does the boat slow down, shudder and shake, what is the WOT fuel pressure should be around 40-43#.. need the 411...

sorry guys this is all new to me, what I can tell you is the studder only happens at full out..RPM's are around 5000 it sorta feels like someone pulls back on the throttle for an instant, and each time it happened I too pulled back on the throttle just after it happened..

Sonic I have read most of your history with these 320 efi - if you could do it again with something differnt would you?

you asked if the boat slowed, shakes and shudder? yes alittle bit, the boat defineately slowed briefly but I pulled it back to fast to experience the shake or shudder.

Are you sure its not a rev limiter kicking in?????????????

Is it this engine in this thread??????

http://www.offshoreonly.com/forums/s...hlight=320+efi

I had one of those engines in a 20' Donzi Minx.
The intake rotted through so had to go with a carb.
Be careful, they are cool, but everyone seems to have the same story...

I will check on the Rev Limiter...thank you..Have you guys heard of any trouble having this type of hp's matted to a Alpha one drive? seems like too much..any suggestions