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Re: Magnito on WC

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Robert Boswell

08-16-1998 18:18:06

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: I have reassembled my '39 WC and cannot get it running.

: How do I check the mag for a spark?

: Where is # 1 plug. From the manual it seems it should be at the 5 O'clock position with # 2 at the 7 O'clock position etc.. Is that right?

: I had to replace the # 4 piston and may have the bearing a bit tight as the starter will barely turn it over. Cranking is out.

: Before I started restoration it did start by pulling but soon broke a valve and ruined the piston!!!! This makes me think the mag is ok.

: I'm having a good time anyway!!!!

: Thanks


Looking at the cap end of your mag the number one plug terminal will be at 10 o'clock.The firing order is 1243.You should be able to pull one of the plug wires and hold it a short distance from the block,turn the engine over and you should see a spark jump the gap.You may have to turn the engine over several times to make sure the rotor passes the wire that you have pulled.Hope this helps.


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08-18-1998 13:43:17

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 Re: Re: Magnito on WC in reply to Robert Boswell, 08-16-1998 18:18:06  
this is a little crude, but to check for spark take the mag off the tractor. remove both caps so that the points are exsposed. lay the mag in your had with the points in your hand. turn the exsposed side with your fingers, and you should get a shock on your hand.

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brian's mags

11-09-1998 13:39:05

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 Re: Re: Re: Magnito on WC in reply to keith, 08-18-1998 13:43:17  

: this is a little crude, but to check for spark take the mag off the tractor. remove both caps so that the points are exsposed. lay the mag in your had with the points in your hand. turn the exsposed side with your fingers, and you should get a shock on your hand.

Please do not check magnetos by holding on to the high tension tower. If you happen to get a good hot magneto, you may do serious damage to yourself. It is much safer and saner to clamp them in a vise, attach a spark plug wire with some type of clip to the high tension output ( this is easy to do w/a Fairbanks mag) and hold the other end near the grounding stud. The mag should fire a least a 1/4 inch of thick blue spark when the impulse is snapped over ( use a pliers or vise grip and turn the mag clockwise, you will feel the impulse spring tension, then the rotor will snap over) . If you need rebuilding help contact me at briand@htonline.com


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