1981or 1985 low end on 1983 35 hp

[james__12345]

Title sums it up. Will a 1981 Or 1985 35hp low end fit a 1983 35 hp? I have a 83 that needs a low end and have found bout an 81 and and 85 for sale. If either will fit please let me know

 

[jimmbo]

The 81 should work as the bolt patterns are the same and so are the driveshafts. In 84 the driveshaft numbers changed, so anything later might not swap

 

[racerone]

The 85 model will have the better pinion and bearings.---IT is the best choice.

 

[Chinewalker]

As a unit, they will all interchange. Parts between them may not as noted above, due to changes in gears, shafts and bearings.

 

[jimmbo]

Wasn't sure about the drive shaft spline

 

[racerone]

I believe there is a wee difference on the flat where the waterpump is driven.-----Earlier pumps were driven by a round metal pin.---Later pumps were driven by a plastic cam.-------The wee difference gives the part a different number perhaps.-----If you know what fits what it does become simpler.

 

[james__12345]

Thanks for all the input. The motor that needed the low end was on my dad's boat. I ended up buying a 1648 flat bottom with a non running tiller steer 1983 35hp and ended up just using that low end to fix it since I already had a motor for the flat bottom.