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John Deere Tractors Discussion Forum
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Valves

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b-boy

10-10-2004 16:14:36




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i think my timing on my 49 b is 180 out of wack which valve is intake the inner one or the outer one

Please help!




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John T

10-10-2004 20:55:43




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 Re: Valves in reply to b-boy, 10-10-2004 16:14:36  
b boy, You mean the cam to crank timing is 180 out, or the ignition timing is 180 out?? What makes you think so??? If the flywheels on the correct crank spline, when the Left Hand Impulse timing mark is at 3 o clock in line with a flat mark on the tractors side, the LEFT piston is at TDC and if the cam to crank and cam to governor gear is also in time, the female drive slot in the governor shaft end (where mag fits into) is flat horizontal fore n aft.

Then, when the Flywheels Exh Valve Open timing mark is at that same 3 o clock line, the left cylinders exhaust valve should just be startign to open I believe.

If its only the timing 180 out and if its a Wico C or X mag, a simple wire reversal will make it run, assuming all the other timings are correct that is.

John T

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Mike M

10-10-2004 17:43:27




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 Re: Valves in reply to b-boy, 10-10-2004 16:14:36  
The inner valves are your intake ones.



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