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Allis Chalmers Discussion Forum
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Puzzled

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Bjk

04-13-2004 03:51:15




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Recently rebuilt motor on D-14. It turns over with the starter +1 Point for me, but it will not fire. Get a flame or two out of the exhaust and then gas will backfire out of the carburator. I have timed and timed... Any ideas. Seems like to much gas at the card, but not so in the cylinder.

Thank you in advance.




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steve

04-13-2004 19:11:08




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 Re: Puzzled in reply to Bjk, 04-13-2004 03:51:15  
i think you are 180 degrees off and firing on the exhaust stroke, not the compression stroke.----the mark on the flywheel is at the left side of bell housing thru 1 inch hole. basically you take out the spark plugs. have your buddy rotate the motor by hand with your thumb over the front plug hole (#1). when you feel compression, the piston is coming up to the top. stop early, and look at the bottom mark on the flywheel. rotate the motor slowly the last 1/4 turn untill the TOP or CENTER mark is visible in the timing hole. leave it there. ----- now the distributor or mag should be pointed at #1 plug wire (remove the rotor cap). and the point should be ready to open, or the mag ready to snap. adjust the rotor to that point. --- now you are ready to start. after it is running the advance will change the timing slightly. you can then chekc with the timing light to get to the FIRE mark if you wish. you will be close.-----

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Tom Davison

04-13-2004 08:46:37




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 Re: Puzzled in reply to Bjk, 04-13-2004 03:51:15  
My 39 B acted like this after overhaul and replacement Mag was installed. The problem was the Mag was timed 1/2 turn off. Corrected this and it started right way. Tom Davison (Pennsylvania)



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Mike IA.

04-13-2004 04:25:57




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 Re: Puzzled in reply to Bjk, 04-13-2004 03:51:15  
Sounds like you may have the firing order off.



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