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| Ignition and coil build up. |
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Message |
    
Claude Fields
Member
Username: claude
Post Number: 6
Registered: 09-2012
| | Posted on Wednesday, October 03, 2012 - 04:44 pm: | 
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I�m using a voltmeter to measure open and closed between the igniter terminal and the engine block. Is the voltage building continuously on the turn of the crank until the engine fires? Or does the igniter only close momentarily to build up the spark before it fires? |
J.B. Castagnos
Senior Member
Username: jb_castagnos
Post Number: 731
Registered: 07-2002
| | Posted on Wednesday, October 03, 2012 - 08:30 pm: |
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Battery powered ignitors were generally open, closed before firing and snapped open. This saved the battery from the constant drain. Magneto ignitors can stay closed until firing. What brand engine are you working on? |
Claude Fields
Member
Username: claude
Post Number: 7
Registered: 09-2012
| | Posted on Saturday, October 06, 2012 - 08:21 am: |
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I�m a novice to this system. I�m working on a 5 HP Acadia engine. It wasn�t making sense to me as I thought the coil would need more time to build up the voltage. Now it makes sense. Did the old mariners carry a spare battery when they went to sea? I love the engineering and quality of the engine. I�m also rebuilding a McCormick-Deering Model M but there are plenty of books and parts for them. This Acadia is a bit more challenging. |
J.B. Castagnos
Senior Member
Username: jb_castagnos
Post Number: 734
Registered: 07-2002
| | Posted on Sunday, October 07, 2012 - 06:46 am: |
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Down here they used dry cells, usually six. This was with a buzz coil. If one died you could remove it and make it home, I guess experience taught them to carry spares. |
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