Topic: 1957 Big Twin Flywheel Cracks – Page 2 – Antique Outboard Motor Club,Inc

This topic has 27 replies, 7 voices, and was last updated 4 years, 6 months ago by Buccaneer.

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July 27, 2020 at 6:34 pm #210077
need2fish
Participant
Seriously, the former owner decided the way to stop his flywheel from wobbling after the hub broke out was to epoxy it in place!
July 27, 2020 at 8:29 pm #210080
outboardnut
Participant
US Member
Man How could anyone think that was a fix
July 27, 2020 at 9:22 pm #210083
Tubs
Participant
A "Boat House Repair" is one that done without having tools or the skills to do it properly.
July 27, 2020 at 9:23 pm #210084
Buccaneer
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US Member
They don’t make epoxy like they use to, lol

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July 27, 2020 at 10:30 pm #210085
seakaye12
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US Member
Buccaneer…….Steven Instrument Company at one time actually manufactured a pressure gauge tester gadget specifically to deal with servicing pressure-tank style OMC Motors. I will look for a picture I once had ….

Also….don’t forget to have a look at the pressure valve assembly behind the reed plate…..
- This reply was modified 4 years, 6 months ago by seakaye12.
- This reply was modified 4 years, 6 months ago by seakaye12.
- This reply was modified 4 years, 6 months ago by seakaye12.
- This reply was modified 4 years, 6 months ago by seakaye12.
July 27, 2020 at 11:21 pm #210112
Buccaneer
Participant
US Member
SeaKaye12, Thanks for the information. I did not know about the Stevens test equipment
for “air” pressure.
I did have the crankcase pressure valve out to inspect and check passages for blockage.
Maybe I’ll rig up a gauge for fun some time and see what happens.
Thanks!

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July 28, 2020 at 8:08 am #210128
fleetwin
Participant
US Member - 2 Years
I have one of those pressure testers, should try it out someday….
July 28, 2020 at 8:12 am #210129
fleetwin
Participant
US Member - 2 Years
Yes, I would start with loosening the cap after running for a few minutes. Yes, this is not an accurate test, but a place to start. Surely there is a problem somewhere if there is no pressure build up after a few minutes of running….
July 28, 2020 at 8:21 am #210130
Buccaneer
Participant
US Member
fleetwin wrote:

Yes, I would start with loosening the cap after running for a few minutes. Yes, this is not an accurate test, but a place to start. Surely there is a problem somewhere if there is no pressure build up after a few minutes of running….

It seemed to run better as time went on, and toward the end I didn’t have
to manually pump gas to the carb. The fuel tank worked good on it’s
sister motor a week prior.
If I can find a cheap “non cracked” flywheel it will get a lake test and further tuning.
I already fixed up a 57 Big Twin for myself, but with electric start, so was going
to try to sell this one to make room. Just don’t plan on buying a $100 flywheel
so I can sell it at a greater loss, lol. I have almost enough left-over parts to make
one more Big Twin, so will probably save those parts for spares.

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July 28, 2020 at 4:07 pm #210171
outboardnut
Participant
US Member
Are you looking manual start or electric start flywheel????
I have a manual start flywheel from a 1955 25 hp RD-17??
Would that work?
Free – you pay shipping
Al
630-624-8282
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