ID this powerhead?

[davidk]

Looks like serial number 48707. According to a chart on the Yankee Chapter site, I think that makes it a 1927 Johnson. What model? (and how is that determined in with motors of this period?)

[stanley]

Model # is stamped on rope plate.Looks like a model A35.

[davidk]

Thanks for your input, Stanley. I don’t have the rope plate. II compared it to a known A35 and there were differences (how the cooling lines ran?)

[stanley]

Pics match my 2 A35 engines.A25 model does route the lines differently and the lines are smaller dia.A45 has same lines as A35.I can’t really get a sense of size of your power head is it same size as your known A35 ?

• This reply was modified 4 years, 3 months ago by stanley.

[davidk]

They are similar in size. The cooling line looked different to me. I see now that the lower line is missing on the motor in question (above).

[davidk]

The jug castings have different numbers from the A35. I wonder if that can help identify the powerhead?

[stanley]

Going by casting numbers (022/012),top power head in picture is A25.Powerhead in bottom pictures is A35.

[davidk]

Strangely, the 022/012 motor is the one that had the A35 sheave plate. Both serial numbers come up as 1927 in the list I saw. Maybe they were using up the A25 jugs before switching over? Regardless, thanks for helping me chase this down.
-David

[stanley]

Another thing to check is water line dia.A35 lines are 5/16” with 9/16” nuts.A25 has 1/4” lines with 1/2” nuts.This is probably best way to determine model.

[David Bartlett]

Man you are having too much fun lately! Making me jealous with all your finds. You must have found a new portal into another dimension of the “Magic Barn”!

David Bartlett
Pine Tree Boating Club Chapter

"I don't fully understand everything I know!"

[Author]

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