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JJ MARSHALL

B&S COILS

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powerking_one

For Magnetron coils(engines originally equipped), the large copper rivet heads should be facing outwards towards the flywheel nut. Thus the Magnetron trigger pole will be on the LEFT side while facing the flywheel. Spark plug wire will be on the right side. If this is an original points ignition 10-16hp cast iron single, the orignal/correct position is reversed 180 degrees; the cast iron 10-16hp were the only exceptions to this mounting rule. Converting to a Magnetron on these engines means reversing the coil position like I said above for it to work and to have the correct ignition timing (also getting the flywheel re-polarized at Briggs).

Tom(PK)

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powerking_one

Quote:

"JJ, The older coils do not have a trigger for the ignition off to one side so it does not make a difference."

This is an incorrect statement. Designers want the electron flow going in a specific direction at the spark plug and ignition points.

True the coil will still work if it flipped around 180 degrees (w/ignition points) but not designed for this spark direction.

http://mgaguru.com/mgtech/ignition/ig104.htm

Tom(PK)

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donmoore1904
quote:Originally posted by powerking_one

Quote:"JJ, The older coils do not have a trigger for the ignition off to one side so it does not make a difference."This is an incorrect statement. Designers want the electron flow going in a specific direction at the spark plug and ignition points.True the coil will still work if it flipped around 180 degrees (w/ignition points) but not designed for this spark direction. http://mgaguru.com/mgtech/ignition/ig104.htmTom(PK)


id="quote">
id="quote">Interesting information - I didn't know about preferable flow of electrons in a spark plug.

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