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  SUPER SPORT 15 Engine Mounting Height

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Author Topic:   SUPER SPORT 15 Engine Mounting Height
Tom C posted 04-05-2014 10:38 AM ET (US)   Profile for Tom C   Send Email to Tom C  
What is the best engine mounting position for a 1988 Johnson 60-HP outboard engine on a 1988 SUPER SPORT 15?. The engine has a hydrofoil. The stainless steel propeller is frozen on the shaft, and I cannot see any markings as to size and pitch. The engine is presently mounted flat on the transom and this is probably the way it came from Whaler. I have not had the boat in water so don't know how it rides. Currently the boat is at a dealer having the engine serviced, and now would be a good time to have the engine raised if needed. Would like advice from others who have this same setup. Main use of the boat will be fishing and crusing.
dgoodhue posted 04-05-2014 01:38 PM ET (US)     Profile for dgoodhue  Send Email to dgoodhue     
Whaler didn't mount the engines, the dealer did. Whaler actually recommended 1 hole up.

Your engine most likely is mounted with blind holes. There is a good chance the prop on the boat if SS and original is OMC SST, perhaps a 13x17P. For that prop I would fill the blind holes and mount the engine 2 holes up. It should be good for ~40mph top speed.

When I bought my 89 15SS, it had a 60hp Evinrude mounted all the way down with blind holes. After fixing the mounting it planned much better and the bow did not rise as much getting on plane. If I had 2 people in boat with both of the back seat it struggled to plane. The engine needed a lot of trim for top speed and was much more prone to porpoising. I suspect the hydrofoil was added to compensation the too low of mounting. I would fix the mount and remove the foil.

Tom W Clark posted 04-08-2014 10:18 AM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
If there are no visible marking on the prop, then it is not an OMC SST II or any other OMC prop.

The motor can be raised as high as it will go if you use a Stiletto Advantage and it can be raised two holes up if using an old OMC SST II

Don't let the dealer tell you otherwise.

Tom C posted 04-08-2014 12:00 PM ET (US)     Profile for Tom C  Send Email to Tom C     
Thanks for the responses. Two up it will be.

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