Prop depth on Evinrude 7.5hp

[drew04]

I did some searching and came to the conclusion that the plate just above the prop should be even with the bottom of my 14 ft flat bottom. Running a '56 evinrude fleetwin. Is this correct?

 

[jerryjerry05]

Re: Prop depth on Evinrude 7.5hp

Yes.A small up or down is ok.J

 

[steelespike]

Re: Prop depth on Evinrude 7.5hp

That old style gearcase may limit the height.But raise as far as possible just before venting(cavitation) becomes a problem.Be sure it pumps water.
I'd be really interested to know how high it allows you to go.
I do know my 55 Gale 5 measures a full 17" from plate to where it rests on the transom.Similar leg to your 7.5.
Depending on your transom I would think that without modifying the transom you could raise it as far as the clamps allow.Just cut a piece of wood to steady the height while you tighten the clamps.You can get more formal once you reach the ideal height.I wouldn't think you would gain much speed but it could be the difference between planing with a load and not.

 

[drew04]

Re: Prop depth on Evinrude 7.5hp

its settin about 5-6" below right now. with on one up front i rode one hell of a wheelie the other day...so maybe evening it up will help

 

[steelespike]

Re: Prop depth on Evinrude 7.5hp

Perhaps it is a 20" there would be a visable 5" extension.
If its really that low you will have a noticable speed and control change.

 

[drew04]

Re: Prop depth on Evinrude 7.5hp

i was tryin to put a pic on here with my phone...ill have to do when i get home...

 

[steelespike]

Re: Prop depth on Evinrude 7.5hp

<img src=http://uscc2.novarra.com:8827/>

huh??

 

[drew04]

Re: Prop depth on Evinrude 7.5hp

Here's a picture of the current set up. Put a red line for a visual aid even with bottom of the boat...

 

[steelespike]

Re: Prop depth on Evinrude 7.5hp

I would raise it as high as possible. You may have to raise the transom for full effect.
Maybe a couple layers of 1/2" ply with a couple of lengths of angle iron for strength.
Of course see how it goes raised on the stock transom first.

 

[drew04]

Re: Prop depth on Evinrude 7.5hp

sounds good ill try that out.
thanks