Re: Farmall A Upkeep Revisited Still

Posted by captaink on July 09, 2004 at 07:04:26 from (66.115.212.249):

In Reply to: Farmall A Upkeep Revisited Still posted by Christopher S. Dunn on July 09, 2004 at 05:26:23:

It�s been a long time since I messed with points in a mag, but here goes. There is what is called an �impulse� in the mag which retards the spark for starting. This is that �click� that you should hear in the mag when you crank the engine over. The click should go away after the engine starts. This �impulse� also makes it difficult to get the cam that opens the points in the mag rotated to the proper position to set the point gap. Try turning the engine backward until the high point of the cam opens the points as wide as possible. This is where the point gap should be set, check the manual but I think it should be set at 0.014� for a mag. The only reason I can think of for the reference to flywheel position is an aid to get the points to their widest position to set the gap.

If you want to make sure that you have the plug wires on correctly, take out the number 1 spark plug and turn the engine over until you feel air coming out of the spark plug hole as it is coming up on compression. When the air stops coming out of the spark plug hole, check to make sure that the spark plug wire terminal on the mag that the rotor is pointing to is connected to the spark plug that you have removed. Then note the rotation of the mag and attach the rest of the wires accordingly. Firing order is 1-3-4-2.

Since you have spark (I�m assuming that it is a bright blue one) and fuel, then the spark is not being delivered to the cylinder at the correct time.

Hope this helps�

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