Swap crankshaft

[Sashap]

Can I swap the crankshaft from 1978 Johnson 70 to 1985 evinrude 70?
The evinrude had the driveshaft rusted in and about 1/2" broke and is rusted in the crank.
I have a Johnson that I could use parts from. Help?

 

[interalian]

BRP site gives them different numbers, so maybe not.

 

[Chinewalker]

I don't see any reason why they wouldn't swap. Bearings, caps and other peripherals are more or less the same. The 1978 will be a 4-spline driveshaft. I think the 1985 is, too. Double check the position of the keyway - should be the same, but you never know.

 

[racerone]

The fine spline did not show up till 89 model year.---I think the 85 crank is a different material, different manufacturing method used.----Should work.-----Take time fitting the stuff.

 

[Faztbullet]

It will fit but you may need to use the lower end cap off the 1978 as there was some long and short snouts. The 78 is a cast crank and the 85 is a forged...

 

[Sashap]

Thanks.