boat handeling problem

[schind]

i have a 74 17ft manatee i bought it as a project boat i replaced stringers and put in new floor previous owner had evinrude115 on it i did not buy motor i installed yamaha 115 on it i have had handeling problems and prop touque problems since install 20 inch transom i have the motor as far down as it will go i wondering if i should raise it up some

 

[steelespike]

Re: boat handeling problem

What kind of handling problems?
Yes;raise the motor to a point just before venting (cavitation)becomes a problem.A prop like a Turning point Hustler will allow a higher setting.

 

[schind]

Re: boat handeling problem

the boat is rated for a 140 i have a 115 it yust feels out of control at high speed and list to left

 

[steelespike]

Re: boat handeling problem

If the motor is too low it may handle strangely.Listing to the left may be prop torque.Is it hard to get the bow to stay up? Does it seem to lay down to much the faster you go?Does it respond when you trim up?

 

[schind]

Re: boat handeling problem

yes it does seem to lay down if i dont keep it trimed up alot it feel like the bow is getting pushed down a friend told me to but some smart tabs on it but i think i need to get the setup right on it before i do any thing to it

 

[steelespike]

Re: boat handeling problem

You probably don't want to hear this but you may have a distortion in the bottom.A slight hollow spot in the bottom probably back near the transom.
Should be easy to find by laying a straight edge along the bottom.
If not too severe you may be able to fill it or perhaps push it out from inside.Smart tabs won't help.Hope I'm wrong after all your hard work.

 

[schind]

Re: boat handeling problem

well i was finely able to look at the bottom of the boat i used a straight edge everything looked good no voids or distortions im going to try to move the motor up one hole and see what that does