Flywheel nut torque Johnson A-45 & F-75

[rapier]

Morning Folks, kindly ask if someone can tell me the flywheel torque for a 1934ish Johnson F-75 (actually my export-only ’34 OBL-70, but it has the same powerhead) and the 1929 A-45 please. Both these winter project are almost renovated now & looking forward to running them for real.

[b-morrison]

If you receive no reponse today, I will check with a fellow who has a master manual. Thought I had the info but I don’t either……..Brian

[Mumbles]

Maybe they didn’t have torque wrenches back in the day but the recommended way to install the flywheel was with a hammer. 😯

I can’t remember the thread size on my F 70 but I don’t think I would torque it any more than 30 – 35 lbs. Better wait for Brian to come up with a proper value.

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[chris-p]

Yeah, an old school OMC mechanic that showed me on the old iron said the torque was 2 swift hits with the mallet! 😉

The Bigger hp motors were 4 swift raps.

Never had torque wrenches back then right. Every couple outings, he said give her another rap.

[rapier]

Thanks Gents, much appreciated.

[b-morrison]

sorry I took so long to reply but, …..yes the old manuals state two sharp raps with a hammer. What I was looking for and what I found was an other bulletin from evinrude with torque values applied to their flywheel.(1959)
3HP…30-40 FT LBS 360-480 INCH LBS
5.5 …40-45 FT LBS 480-540 INCH LBS ETC. Now I gotta go and give my motors a rap or two……….Brian

[garry-in-michigan]

This covers most Evinrudes . . . 😎

[Author]

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