1980-150 revs up

[bayliner-150]

My 150 Mercury revs up on full trottle take off..prop is moving alot of water but don't pick up speed,,seems like the prop is not grabbing enough water//got it on a 17' 1989 bayliner,,prop is a 12" 25P,,is there a slip clutch or something like that anywhere?

 

[achris]

Re: 1980-150 revs up

Check installation height. The cav plate should be level with the bottom of the boat.<br /><br />Chris...........

 

[bayliner-150]

Re: 1980-150 revs up

Chis,,the part where the rubber flange is bolted on is about 2" higher then the bottom of boat,,should I take that piece off,,maybe it will get more water,,please help!!!

 

[achris]

Re: 1980-150 revs up

Bayliner,<br /><br />I'm going to need pictures. I don't know of any rubber flange on the engine. <br /><br />The cav plate is the large plate on the engine immediately above the prop. That should be level with the bottom of the boat.<br /><br />Chris.........

 

[bayliner-150]

Re: 1980-150 revs up

Cris the rubber flange I'am talking about is the trim plastic that mounts on the bottom of the motor to get out on plane better!!Please email me @ (refohl@yahoo.com) and i will send you some pic's....Thanks for any info,,,Andy

 

[Barnacle_Bill]

Re: 1980-150 revs up

If the motor is sitting on the transom as low as it will go, I suspect someone change a long shaft for a short shaft. Also, you might want to check and make sure your prop is not turning on the hub.