I have a 2000 Searay Sundancer 340 with 7.4 MPI V-drives. It won't go above 4000 RPM. At 4000 RPM, it is going about 21 knots. The bottom is clean and I just had a full service with compression check on the engines. I can't figure out what is wrong with it. Any suggestions?
21 knots rb2@gr5t WOT! What is wrong with this boat!
- Thread starter mmmendoz
- Start date
Remove excess weight, experiment with trim tabs [is it squatting?], compare prop specs and performance results with other RO's with same/similar boat. Verify that engine spark timing is correct, maybe somebody didn't do it right.
Is this problem new, or was it performing better till you had the full service?
Is this problem new, or was it performing better till you had the full service?
- Joined
- Sep 16, 2003
- RO Number
- 12212
- Messages
- 12,185
more details neeed. how long have you had the boat ? has it been gradually loosing perfrmance or all of a sudden ? did you check to see if the tabs work ? any vibrations ?
what's a full service anyway... there isn't much in there that can affect performance. I'm surprised the shop didn't sea trial the boat after service.
if compression is good, etc.. then the props have to be suspect.
OR.. check the throttle cables, make sure they are actaully moving the throtlle fully open
what's a full service anyway... there isn't much in there that can affect performance. I'm surprised the shop didn't sea trial the boat after service.
if compression is good, etc.. then the props have to be suspect.
OR.. check the throttle cables, make sure they are actaully moving the throtlle fully open