1973 evinrude 18hp head

[B.johnson1993]

im lookin for a cylinder head for a 1973 evinrude 18hp fastwin, I found a cylinder head off of a 1973 20hp, I looks physically different, will it work in this motor? My model number is 18304a

 

[jimmbo]

The Evinrude 18 and the Johnson 20 are the same engine. How does it look different? Pictures of both would be nice. It is possible that one of the heads is not the original head to that particular engine, or is one of the various production changes during a model year production run

 

[B.johnson1993]

Turns out they’re the same after looking closer but I’ll post them just to make sure it’s a good head

 

[B.johnson1993]

[No message]

 

[B.johnson1993]

Will a 1973-1976 25hp head work?

 

[flyingscott]

Will a 1973-1976 25hp head work?

No it will not.

 

[F_R]

It (25hp) will bolt on, but NO, don't do it. It must be used with different pistons to get the correct compression ratio..

 

[B.johnson1993]

Any ideas where to get a head for this motor? I’ve been looking and can’t find one, been on Craigslist, ebay, the head number is 0385790

 

[racerone]

Your location ?

 

[B.johnson1993]

Minnesota

 

[F_R]

Thinking racerone might have one? Otherwise, go to the Antique Outboard Club's website www.aomci.org and place a want ad on their classified ads pages. The ad is free.

 

[B.johnson1993]

Will a head from an older 18hp evinrude work? I can find them easily online, they just don’t have the spot on the head to bolt the ignition coils to, if I put one of those heads on would it work? I could just run new grounds from the coils to the head

 

[racerone]

You could likely fabricate a bracket to mount the coils.----Not that hard to do I think.