1988 88 spl lower unit

[tjr]

Can I use lower unit from a v4 motor if the shaft length is the same(20). Does the hp matter.

 

[WillyBWright]

Re: 1988 88 spl lower unit

Welcome to iboats.<br /><br />Has to have the same splines. Different horsepowers use different gear ratios, but you can compensate with a different prop. There is alsthe bolt pattern, they have to match. There was a change between 1977 and earlier and 1978 and later. Probably other changes along the way.

 

[tjr]

Re: 1988 88 spl lower unit

Thanks<br />I knew it would not be easy or cheap.

 

[Dhadley]

Re: 1988 88 spl lower unit

Let us in on what you have and we'll see if we can steer you in the right direction.

 

[seahorse5]

Re: 1988 88 spl lower unit

They changed driveshaft configuration in about 1992. The later driveshafts do not have the groove for an oring. The crankshafts were also changed to have an oring in them to seal the splines.<br /><br />You may need to buy a driveshaft if you find a later model gearcase.

 

[tjr]

Re: 1988 88 spl lower unit

I have a 1988 88 spl johnson, would a 1990 johnson 90 lower unit be thee same?

 

[Dhadley]

Re: 1988 88 spl lower unit

Yes.

 

[tjr]

Re: 1988 88 spl lower unit

thanks for your help everyone. It looks like i'll get the boat in for this weekends thunderstorms.my last name should be murphy.<br />Tom Riley

 

[Dhadley]

Re: 1988 88 spl lower unit

Lol! Great attitude! I like that!<br /><br />Here's hoping you do get to go out this weekend!