1990 90 HP Force Lower end quesiton**Please hlep**

[iambass]

Hi,

My lower end is completely shot. I'm currently looking for another one and I have had couple people approach me with 1989 85HP lower ends. Will this work?? What is compatible??

Thank you everyone!!!

 

[tjello327]

Re: 1990 90 HP Force Lower end quesiton**Please hlep**

I would check this web sight as if you were buying a new one to just check part numbers for yours and the 1989 model.

 

[kandil]

Re: 1990 90 HP Force Lower end quesiton**Please hlep**

I think you could only use the 90 and 120HP lower up to 94 Frank would probably know

 

[Frank Acampora]

Re: 1990 90 HP Force Lower end quesiton**Please hlep**

I did the exact same thing! I have a 1990 90 hp with no lower unit. I swapped a lower from the earlier years onto it with no problem. The only thing you need to check is that the shaft length is the same as your engine.

Although the 1990 lower unit has a two piece drive shaft and a different watr pump and the 89 most likely has a one piece shaft, the shaft splines are the same and everything fits.

As far as bolt patterns, any 85, 90, 120, 125, 150 lower unit from about 1979 on up to about 1994 will fit but the earlier ones and the four cylinder ones were 1.73 instead of 2 to 1. Using a 1.73 lower will necessitate a prop change down 2 pitches and performance still will be a bit less than original.

Please see my private message to you.