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Allis Chalmers Discussion Forum
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Re: Firing Order 1948 B Allis Chalmers

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Dick L

03-20-2017 15:21:27

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If you put the flywheel on CENTER before you try to bolt your magneto to the block you will not get the drive to line up because of the impulse spring. You first set it to the FIRE line or even back the engine up a little so when the magneto drive lugs line up you do not have tension on the impulse spring. Then after you have the magneto bolted fast you find the Center line in the inspection hole when you spark on number one cylinder at the compression stroke. If you do not see the Center line you rotate the magneto a little until you have the Center line in the center of the inspection hole. If do it this way when running with a timing light you would see the FIRE line in the center of the inspection hole. Your magneto has a 30 mechanical advance. When cold timed at TDC the advance places the FIRE line in the center of the inspection hole when running at high idle. I always take these steps when installing a magneto to prove to my eyes I have it timed to run. Many will say it is not necessary to take this step. Just time it by ear after it starts. I learned thru my many mistakes that I personally can not assume anything. The extra time for me to prove things out saves me time in the long run.

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03-20-2017 19:08:27

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 Re: Firing Order 1948 B Allis Chalmers in reply to Dick L, 03-20-2017 15:21:27  
Got it .. Thank you again !!!!!

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