Mercury I/0 prop annode question

[Godfirst]

Have a alpha 1 sterndrive I/0 on a 5.7 went to a different size prop question how much space between prop and anode? do you really need one?

Thanks for response

 

[tpenfield]

Re: Mercury I/0 prop annode question

Not sure about the spacing . . . you may just have to try it and see. Was there one on it before the new prop?

As to if you really need it . . . salt water=yes . . . fresh water=probably . . . trailered in fresh=probably not

 

[steelespike]

Re: Mercury I/0 prop annode question

There are what I call "button anodes" available that eliminate clearance issues.

 

[Scott Danforth]

Re: Mercury I/0 prop annode question

My Alpha 1 had a flat anode installed. The prop would not have fit with the trim tab style anode.

 

[tpenfield]

Re: Mercury I/0 prop annode question

Not sure which vintage of alpha 1 we are talking about . . . or are we talking about prop shaft anode or ventilation plate anode . . . :noidea: Help us out with a little more info OP . . .

 

[oldjeep]

Re: Mercury I/0 prop annode question

My Alpha 1 had a flat anode installed. The prop would not have fit with the trim tab style anode.

There is an offset trim tab for props that have more cup.

There is also one called a performance trim tab which is also offset but doesn't help much with steering since it is so small.

 

[Godfirst]

Re: Mercury I/0 prop annode question

Ist generation alpha 1 1987, thanks for the imput yes used in salt water mainly probably will go with a smaller one or a flat one I was told they also work somewhat as a rudder and help if the boat list to one side.

 

[Godfirst]

Re: Mercury I/0 prop annode question

Also there is a science part of all of it proper cavatation and not to burn the prop damage the cavatation plate etc;

 

[mike165]

Re: Mercury I/0 prop annode question

It's to c0nteract prop torque,i run a flat one with a 21x14 4 blade on a bayliner 215 5.7l hydralic steering works well