Can't get on plane

Comonster

Recruit
Joined
Jun 2, 2011
Messages
2
New boater looking for some help. Just bought a 1994 28' chris craft with a 7.4 and volvo penta duo prop. If anyone other than myself is in the boat, they need to sit in the bow cabin in order to get on plane. Once up, WOT is 3,900-4,000. Engine sounds good but won't go past 2,800rpm if not on plane. I have C4 props on it now. I have deduced it down to the props or my timing is not advancing with the throttle. Any input will help.
 
Joined
May 13, 2011
Messages
62
Re: Can't get on plane

Can you find some of the previous owners and inquire about previous performance? Also could be flappers stuck in the bottom of the y pipe. Hows the temp. Id check that WOT range in the book too. 4000 sounds a little low.
 

Comonster

Recruit
Joined
Jun 2, 2011
Messages
2
Re: Can't get on plane

It was a repo so no prior history. Temp is good at 160. WOT should be 4,400. Would changing to a B3 prop set be a potential fix?
 
Top