Match engine shaft to transom

[Jay45]

Hi, new to the forum. Hope I'm posting in the correct section. I have a 14' Sea King with 28hp Evinrude. Engine has a twenty inch shaft. Prop appears to be way too deep when compared to the keel. Height of transom is 16 inches. If prop is riding too deep, what kind of problems can this cause? I just bought the boat and have not had it in the water yet, hence am not familiar with it's performance. Engine does have a hydrofoil bolted to it. Never used one of these, so do not know what to expect. Any help, information, advice would be appreciated. Thanks Jay

 

[tashasdaddy]

Re: Match engine shaft to transom

the foot will be too deep, and cause excess drag. the foil that deep will cause untold problems. you need a transom jack or jack plate to raise the motoer 5 inches.

transom elevator:

 

[Jay45]

Re: Match engine shaft to transom

Thank you very much for the information. One last question. Upon measuring shaft length (from bottom of mounting bracket to cavitation plate I get about twenty three inches. Data plate says engine has a twenty inch shaft. Don't know what's going on here, but assuming cavitation plate rests seven inches below bottom of transom, is it possible to raise engine that amount (7") with a jack plate? Is that too much of a vertical rise? What is the maximum vertical lift one should raise the engine. Thanks Jay

 

[tashasdaddy]

Re: Match engine shaft to transom

what is the model # of your 28?

 

[pcrussell50]

Re: Match engine shaft to transom

td,

you were very helpful to me with the same jack plate advice a few weeks ago. now, a question had cropped up in my mind. was your jack plate made from one big sheet of 3/16" or is it really made of two different fabricated angles, with the plywood boards bridging them?

-peter