Need a block for a 87 8 hp Evinrude

[Robj]

Hello,

The connecting rod bearings let go on my 8 hp and now I need a new block, crankshaft and pistons. Does anyone know what other models and years used the same block?

Thanks,

Rob.

 

[boobie]

Re: Need a block for a 87 8 hp Evinrude

Try the top secret files at the begining of this forum and look for salvage yards. You could also try shop.evinrude.com and compare model yrs.

 

[Robj]

Re: Need a block for a 87 8 hp Evinrude

Try the top secret files at the begining of this forum and look for salvage yards. You could also try shop.evinrude.com and compare model yrs.

Thanks for the suggestion. I could not find any cross references. I have a few motors laying around 7.5 and 6 hp and was hoping some of the parts would be interchangeable, but I guess not. They all seem to have different part numbers.

I will try and find a used one of the same vintage.

 

[Chinewalker]

Re: Need a block for a 87 8 hp Evinrude

As a unit, the 7.5 and 6hp powerheads will bolt up, but the 8hp block was unique in that it had a larger reed plate. So, if you don't mind giving up a pony or two, find a complete powerhead. If you want all 8 ponies, then only an 8hp will do...

 

[the machinist]

Re: Need a block for a 87 8 hp Evinrude

I haven't been that deep in those years 6-8hp & as Chinewalker says the reed valve plate is different on those 8hp, BUT only from 88 to 90. The 6 & 8hp reeds were the same from 84 to 87. If you had a mismatch, there could be the possibility that the intake manifold & reed assembly may interchange off the blown 8 onto a 6hp block.

 

[Robj]

Re: Need a block for a 87 8 hp Evinrude

Thanks for the info. I do have some 6 hp motors laying around, wonder if they would work. I looked at the part numbers for the block, crank and pistons and they were different from the numbers on my 8 hp. I guess the only way to tell is to rip a 6 hp apart and compare.

 

[kbait]

Re: Need a block for a 87 8 hp Evinrude

You could go here: Johnson Evinrude Outboard Motor Parts by Year 1955 to 2011 and compare powerhead base gasket #'s.. If they're the same, at least you'll know if it'll bolt on to the exhaust housing.

Good luck!