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Re: FMJ Magneto, spark plug wires

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John T

05-05-2013 06:10:23

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I suspect your friend may be confusing carbon core suppressor wires (NOT best thing for Magneto Ignition) with stranded wire core (better for Mag Ignitions) plug wires.

Still even if it had carbon core suppressor wires that alone dont stop her from firing.

Even oxidation on point surfaces can prevent a mag from firing, let alone carbon and burns and pits (much worse). Id non abrasively as possible try to clean/buff/polish the points n check the gap and try her. You could even drag a dollar bill (a $20 may do better lol) between the surfaces n see what happens. For carbon or pitting a points file may be more in order, but once you over file them a lot they dont last long.

Of course, she cant fire at low cranking speed unless the spring wind n trip impulse assembly is working, although they can still pull start n run if thats the case.

John T

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bjb in Tx from Ne

05-07-2013 10:09:57

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 Re: FMJ Magneto, spark plug wires in reply to John T, 05-05-2013 06:10:23  
John T,

I have been meaning to ask, why are the carbon cores bad for a magneto system. I bought a set for my WC from Napa not knowing they were carbon core until I cut them to length. It usually starts right up when hand cranking (if i put enough gas in the tank). Will I ruin my mag if I run the carbon core wires? I normally only run it for about an hour when I am home in the summer.

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