Re: Making a magneto weatherproof

Posted by Bob M on December 02, 2004 at 04:31:22 from (151.190.254.106):

In Reply to: Making a magneto weatherproof posted by Steve W (NY) on December 01, 2004 at 13:59:39:

Steve – I’ve had best luck with some sort of rain shield like a flap cut from inner tube, or an old plastic antifreeze jug trimmed to fit. Goal is to prevent rain and splash from getting on the mag, but still permit free air flow around it.

Other stuff that helps: Keep the magneto cap and coil cover scrupulously clean inside and out. (A thin layer of dust on surfaces gives moisture something to “stick to” and causes high voltage shorts...) Make sure the wires, boots, etc are in good shape (no cracks) and are solid copper type (no RF surpression wires). Spray the wires and magneto exterior with silicone spray, RainEx, or similar when the parts are clean and dry to repel water.

Wrapping the mag tightly in plastic film is not recommended! Any condensation etc that gets inside the wrapping is trapped and can cause all manner of short circuit and corrosion problems. I don’t recommend it.

FWIW we were out doing Christmas trees at Stokoe Farms in that same rain – it indeed came down pretty good for a while! It killed the mags on a couple of the tractors (both incidentally painted JD green!) However the others - a pair each of Farmalls and Minnie Mo’s - slogged thru the downpour and never missed a beat.

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