Scott-Atwater parts interchange

[mstrvanmvr]

I have a Scott-Atwater 467 137330 (1946 3.5 HP) and need a piston,rings, and connecting rod. Would a 1955 model parts be the same specs. and/or the complete working pwr. head swap without problems/modification

 

[twocyclemania]

Re: Scott-Atwater parts interchange

I have small 3.6 Scott's; one a 48 or so and the other a 61 or 2. They look really similar but I'd check with an expert like the Scott Guy. You can find him on-line and he does answer questions. He can give you the definitive. It's a smart move if you can replace the whole powerhead instead of messing with the internals. I'm sure you've seen complete powerheads on ebay for dirt cheap. The way to go.

 

[F_R]

Re: Scott-Atwater parts interchange

The '46 had a 4-bolt cylinder head, later ones had 6. I'd have to compare parts books to tell what else is different.

 

[mstrvanmvr]

Re: Scott-Atwater parts interchange

Thanks for both replies. I am aware of "the Scott guy" , but Ebay has a 1955 3.6 HP powerhead for 1/3 of his cost and accept paypal ! Also, the change from 4 to 6 bolt head pattern. There seems to be some casting differences, but my main concerns are the topside on the 1955 has a square"ish" casting with approx 5 bolts below the topside "below magneto" which my "46" does not ; and would the crankshaft diameter and length be the same . I need a whole power head. After clean up and hone of the cylinder a crack was found!: Just finishing final floor/seats install "weather permitting" on my 1967 Crestliner Del Rio with 1974 Johnson 115. Thanks for all advice within these forums. Picts soon!

 

[mstrvanmvr]

Re: Scott-Atwater parts interchange

After a closed comparison, the water jacket on the 55 is angled whereas on the 46 its straight. I don't believe it would line up with water tube ! Vintage 1955 Scott Atwater Outboard 3 6hp Powerhead Motor Engine | eBay /

 

[mstrvanmvr]

Re: Scott-Atwater parts interchange

This is the 1946 , 3.6 HP powerhead #463 with the straight Water Jacket for pick up tube. Would a powerhead with cast #462 / transom clamps # 462-2408 work? It is a 1946 Firestone 3.5 HP.