Sea Ray 240DA unstable in planing

aerobat

Master Chief Petty Officer
Joined
Jun 1, 2011
Messages
835
Hello !

we have a problem with unstability in planing with our sundancer 240DA. the boat is equipped with the mercruiser 5.0 mpi and bravo three z drive as well trim tabs.

the problem is that the boat rolls to port or stbd side in planing when straight on course. trimming seems to have little results , the trim tabs are set to neutral. trying to reduce this with trim tabs sometimes worsens the effect since the boat reacts very sharply to trim tab input.

we have some boat exerience in planing boats and did not saw this before. the boat is 2010 and has no damage , so it is not very probable that we deal here with a technical failure.

can you give some hints what we may do wrong, does anybody has experience with this boat and this engine?

best regards !
 

shrew

Lieutenant
Joined
Dec 29, 2006
Messages
1,309
Re: Sea Ray 240DA unstable in planing

I suspect this is occurring just after you've gotten on plane, or right when you get up on plane. The next time you get on plane, as soon as the boat starts to list, click the drive trim out 1 click at a time until the boat striaghtens out. Usually around 3 clicks. Adjust the rest with trim tabs. It takes some fine tuning.
 
Top