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Discussion Forum
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WD Backfire

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RW's WD

01-30-2003 07:49:36




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My WD has always started great. Yesterday I went to start her and she tried but would only sputter and die. Now, when I try to start her again she will turn over and only put out a large, noisy backfire. Since we haven't had much snow to move this winter she has not run for a couple of months. Any ideas or suggestions on what to look for or try to get her started?




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Dave K

01-30-2003 11:58:49




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 Re: WD Backfire in reply to RW's WD, 01-30-2003 07:49:36  
Fresh fuel?

Does fuel run freely out of carb with drain cock open? If not, plugged fuel tank drain, filter or lines.

If magneto, clean up or better yet replace points and condenser. be sure you hear the "snap" from the impulse on the mag. Mine did this and it was the condenser in the mag. If no "snap" then impulse spring is probaby bad although dirt and cold weather can also keep it from snapping.

dave

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DonLC

01-31-2003 04:38:08




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 Re: Re: WD Backfire in reply to Dave K, 01-30-2003 11:58:49  
Sounds the wrong plug is getting the fire.Spray the inside of the cap and the wires with starter fluid....let it dry good,we don't want to start a fire....this will get rid of the moisture in the cracks.If you have been ranking on it a while, you could have gas standing on the pistons,,,,every tine the pistons come up the plug gets dipped in liquid gas....remove the plugs and blow the cylinders out.....burn the plugs clean with a small flame.....

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DonLC

01-31-2003 04:37:44




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 Re: Re: WD Backfire in reply to Dave K, 01-30-2003 11:58:49  
Sounds the wrong plug is getting the fire.Spray the inside of the cap and the wires with starter fluid....let it dry good,we don't want to start a fire....this will get rid of the moisture in the cracks.If you have been ranking on it a while, you could have gas standing on the pistons,,,,every tine the pistons come up the plug gets dipped in liquid gas....remove the plugs and blow the cylinders out.....burn the plugs clean with a small flame.....

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TX Denny

01-30-2003 09:37:16




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 Re: WD Backfire in reply to RW's WD, 01-30-2003 07:49:36  
Same thing happened to my WD. Finally concluded that the plastic parts on the magneto were carbon tracking all over the place. Had to either replace all the plastic components or switch to a distributor with good cap and rotor. I switched to a distributor. As with yours, this happened one day when I tried to start it. It didn't run again until the distributor was in place.



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RW

01-31-2003 12:20:19




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 Re: Re: WD Backfire in reply to TX Denny, 01-30-2003 09:37:16  
Thanks to all. I did not mention in the original post that I converted over to a 12v system two years ago. It has a Distributor, rotor etc. So....I think that I will replace the cap, rotor, condensor and points this weekend. Hope this works. I'll let you know.



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DAVE

02-09-2003 11:53:15




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 Re: Re: Re: WD Backfire in reply to RW, 01-31-2003 12:20:19  
IF AND I REPEAT IF IT IS MOISTURE THERE IS A PRODUCT CALLED WIRE DRY--NOT SURE OF MANUF. BUT IT IS THE BEST INVENTION SINCE TOILET PAPER. NO NEED TO DISASEMBLE CAP OR ANYTHING JUST SPRAY AND START. EVEN AFTER HOT WATER PRESSURE WASHER ON A PRE-PAINT JOB. JUST SPRAY DIST CAP USUALLY DOES THE TRICK.



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