after new prop boat is not easy to control

[betayv]

hi there this is kind of weird I have a mercruiser 305 I used to have a 3 blade prop 14-21 never have any issues boat ride beautiful, prop broke so I replaced the prop with a 4 blade 14-21 but I notice that is more difficult to control the boat specially going on reverse any reason why Im looking for a logical explanation about this thanks.

 

[Randybeall]

Re: after new prop boat is not easy to control

More difficult to control, could you expand on that? A 4 blade prop has more contact with the water and can transfer more power, there fore gives more feedback. If you have a torque steer problem the trim tab needs to be adjusted on the bottom of the ventilation plate. Have you gone through the adjustment range of in and out on the lower unit? Is the boat torquing over, one side higher than the other? Need more specific information please.

 

[betayv]

Re: after new prop boat is not easy to control

hello and thanks for advice (tab needs to be adjusted on the bottom of the ventilation plate. Have you gone through the adjustment range of in and out on the lower unit) what do you mean by adjustment range in and out, and to be more specific the steering is more difficult to control the boat try to go left and right.

 

[Randybeall]

Re: after new prop boat is not easy to control

Guess I wasn't very clear. Have you adjusted the trim is what I should have said. When you say that it is trying to go right and left do you mean at speed, sometimes called chine walking? Have you run the steering through the range with the engine off and made sure there is no steering mechanism issues?

 

[a70eliminator]

Re: after new prop boat is not easy to control

Difficult as in maneuvering between docks and such at idle speed? Your idle too high maybe for the new more efficient prop?

 

[betayv]

Re: after new prop boat is not easy to control

I will check the steering mecanism to be sure is nothing wrong with it, but probably what a70eliminator said I will inspect and keep you guys posted thanks.