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What makes a WD pop when throttle is closed?
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kevin LA-CA View Drop Down
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Joined: 12 Sep 2009
Location: california
Points: 80 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kevin LA-CA Quote  Post ReplyReply Direct Link To This Post Topic: What makes a WD pop when throttle is closed?
    Posted: 14 Mar 2026 at 8:05pm
I know that the WDs always pop when you close the throttle quickly. Mine really pops. Loud - 2 or 3 bangs.

Magneto ignition. I have timed by ear - don't have a timing light. Also aftermarket marvel carb with adjustable main jet.

If I got found a light, where is the timing mark?
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Ed (Ont) View Drop Down
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Joined: 08 Nov 2009
Location: New Lowell, Ont
Points: 1587 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ed (Ont) Quote  Post ReplyReply Direct Link To This Post Posted: 6 hours 39 minutes ago at 6:57pm
I see you have the same post twice.  If you have a light you time it laying on your back. Take off the inspection cover for the clutch. Clean things up. You will see marks on the flywheel.  Time it to the “F” mark at 1/2 throttle or more.  That is 24 degrees if I remember correctly. You will need 2 people who kind of know what they are doing! You can use the light, other person to play with the distributor.  Or if you have no help you can do it yourself - may have to get up and down a few times. Smile
The “F” means fire.


Edited by Ed (Ont) - 6 hours 38 minutes ago at 6:58pm
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