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Farmall & IHC Tractors Discussion Board

Re: M Farmall Idles Rough


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Posted by Janicholson on June 29, 2009 at 20:03:35 from (66.173.50.157):

In Reply to: Re: M Farmall Idles Rough posted by Grademan on June 29, 2009 at 17:01:23:

First make sure the centrifugal advance is working. It is checked either by using a timing light, or by rotating the rotor CW. It should turn about 1/4 to 3/8 inch at the tip, then spring back when released. (or the breaker plate can be removed to look at the springs and pivot weights).
Time as follows: Set the point gap to .020" on the very top of a distributor cam lobe.

Put #1 cylinder on TDC compression. (hold your thumb in the hole and turn it with the fan until pressure is detected coming out of the hole.

Then match up the timing mark on the front pulley. Putting a soft piece of wire in the cylinder through the spark plug hole also indicates when you are very close to TDC.

Then use a test light on the wire going to the points from the coil. Loosen the distributor. Turn on the ignition. (in neutral of course) and then turn the distributor clock wise(retard direction)until the light goes out. Then turn it back CCW slowly until the light just comes on. If it is out without turning, turn it CCW until the light just comes on. Tighten it down. Static timing is now set, and if the Centrifugal advance is working, it will be in time. JimN


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