| Author |
Message |
    
dick_briggs
Advanced Member
Username: dick_briggs
Post Number: 37
Registered: 02-2015
| | Posted on Wednesday, December 02, 2020 - 03:43 pm: | 
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From a friend, found in a large lot of mostly Model T stuff. Looks like a timer but still pretty odd ball. Any ideas? Thank you.
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ernie
Senior Member
Username: ernie
Post Number: 2617
Registered: 01-2002
| | Posted on Wednesday, December 02, 2020 - 07:18 pm: |
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Would have been on a 2 cylinder 4 stroke odd fire engine.
Would have sounded like a 2 cylinder John Deere tractor |
johnny
Senior Member
Username: johnny
Post Number: 624
Registered: 03-2006
| | Posted on Wednesday, December 02, 2020 - 10:18 pm: |
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I think a John Deere two cylinder fires 180 degrees apart. These contacts are firing on 45 degrees would this timer be for a V-twin engine with cylinders on 45 degree's? |
ernie
Senior Member
Username: ernie
Post Number: 2618
Registered: 01-2002
| | Posted on Thursday, December 03, 2020 - 01:42 pm: |
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The timer is going to rotate at 1 half crank speed like the cam. This being the case they are 180 out related to the crank. |
dick_briggs
Advanced Member
Username: dick_briggs
Post Number: 38
Registered: 02-2015
| | Posted on Friday, December 04, 2020 - 04:47 am: |
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Thanks for the thoughts; I'll pass them along, but where might the other lead (from battery or coil) attach? |
ernie
Senior Member
Username: ernie
Post Number: 2619
Registered: 01-2002
| | Posted on Friday, December 04, 2020 - 02:44 pm: |
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Timers usually ground the coil so the batt minus lead went to the engine block. The timer was grounded through its mounting on the engine. Battery plus went to the coil batt terminal |
johnny
Senior Member
Username: johnny
Post Number: 626
Registered: 03-2006
| | Posted on Friday, December 18, 2020 - 01:22 pm: |
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Ernie, Thank's for the info as I know you have been working on the old marine engines much longer then I have. I know the timer contact locations & the gear ratio have to be worked out so the ignition fires at the proper time. I have owned a few different two cylinder two stroke marine engines and the timers on them have the contacts 180 degree's apart just like the crank throws. Guess that is why I thought this timer might be for a 45 degree two cylinder. Guess it really depends on the gear ratio as to where the timer contacts would be located? Also if it is a four stroke or two stroke? |
