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Message |
    
dougleen
New member
Username: dougleen
Post Number: 1
Registered: 06-2020
| | Posted on Sunday, July 03, 2022 - 08:11 pm: | 
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Just rebuilt a 1911 patent Cushman binder Model C and installed a magneto. The engine smokes but won't run. The spark is issued at about 90 past TDC and a 180 degree change puts it about 90 before TDC. Carburetor appears to work but it could be a gas delivery issue--the needle valve is 3 turns open. I should think the spark should be timed at or just before TDC? Any help out there? I' also looking for a clutch--this will go in a 15' boat.   |
ernie
Senior Member
Username: ernie
Post Number: 2691
Registered: 01-2002
| | Posted on Monday, July 04, 2022 - 07:32 am: |
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Doug,
Can you post a couple of pics of the mag and how it is mounted on the engine?
Thanks
Ernie |
putty
Member
Username: putty
Post Number: 23
Registered: 02-2022
| | Posted on Tuesday, July 05, 2022 - 03:39 am: |
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Doug, just my 2 cents but 3 turns open on the needle valve sounds too much and it might be flooding, standard opening is around 1 to 1.5 turns open and then closing back slightly to lean it out as she warms up. start rich, run lean and find the sweet spot.
Apart from that, I'm reading the spark is firing at 90 degrees on the flywheel past TDC, if that is so then something is messed up.
Picture of Mag in situ like Ernie said.
Nice looking boat and motor.
Cheers. |
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