Long Shaft Motor, Short Transom.

[1BadTitan]

Ok, I picked up this motor, couldnt pass on the deal. But, will it work ok? I have a 16" transom (18" but it goes down in the center 2" where the motor clamps). The motor has a 20" shaft. Its an 86 Merc. 9.9hp tiller, electric start, looks like it was hardly used. I'm just a bit concerned about the shaft length. Will I run into trouble here?

 

[JimS123]

Re: Long Shaft Motor, Short Transom.

Yes you got trouble. Your boat was designed for a short shaft motor. If you run it you won't be happy with the performance.

 

[pootnic]

Re: Long Shaft Motor, Short Transom.

While it won't be ideal,it's not the end of the world either.
You can probably make alittle jackplate or riser to make it work perfect.

 

[1BadTitan]

Re: Long Shaft Motor, Short Transom.

Thank man, I searched and founf something called a "Mini Jacker" I'm gonna make something like it, just with a little more vertical lift to perfect my application. Thanks guys

 

[Bob_VT]

Re: Long Shaft Motor, Short Transom.

Make your own like this one http://forums.iboats.com/showthread.php?t=321432&highlight=jack+plate

 

[Texasmark]

Re: Long Shaft Motor, Short Transom.

Engine isn't all that big and yes your drag will be high, but if you were interested in speed you would get a higher hp in the first place.

Try it then worry about change.

Mark

 

[Solittle]

Re: Long Shaft Motor, Short Transom.

I been runnin a long shaft engine on a short shaft transom. Not ideal but works well.

 

[B-Dozer]

Re: Long Shaft Motor, Short Transom.

I ran a long shaft tiller on my 14ft flat bottom worked just fine but had some spray because she was too deep.

 

[Texasmark]

Re: Long Shaft Motor, Short Transom.

I ran a long shaft tiller on my 14ft flat bottom worked just fine but had some spray because she was too deep.

That's a good point. The spray deflector is below the water level.

Mark