Re: weak spak

Posted by John T on September 01, 2005 at 19:55:37 from (66.244.90.98):

In Reply to: weak spak posted by Corndude on September 01, 2005 at 16:47:52:

Dude, I have little to no experience on an F 20 but can still offer some general opinions based on tractors and ignitions in general.

On Magneto Ignitions, use wire core and NOT carbon core suppressor type plug wires.

Its critical on mags to have good clean points gapped correct, the CORRECT size of any condensors, and good caps n rotors etc.

If the plugs are fouling and when removed have a flat black colored sooty appearance, thats indicative of excess unburned fuel from,,,,,,running the carb too rich,,,,,,,,,,air inlet restrictions in the air cleaner or piping,,,,,,,,,,chokes not staying full OPEN,,,,,,,,,engine not running hot enough,,,,,,,,,too cold heat range plugs,,,,,,,,oil burner or low compression,,,,,,,weak spark

It can help if you use shutters or t stats or radiator air restrictions TO KEEP THE ENGINE TEMP UP OVER 180.

It can help to use plugs that are rated HOTTER then specified.

It can help to avoid long idle periods and run the engine/carb on the lean side.

OF COURSE, as you speak of, IT HELPS TO HAVE A GOOD HOT BLUE SPARK.

"Thats all I have to say about that" (and about all I know lol)

John T, retired electrical engineer in Indiana

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