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Re: sick bn
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Posted by Bob M on August 30, 2006 at 12:07:42 from (151.190.254.108):
In Reply to: Re: sick bn posted by daazman on August 30, 2006 at 11:35:35:
Presuming the 2nd carb you tried is OK and partial choking did not help any, I'd be looking now toward a weak spark. First check the easy stuff: If the engine has resistor plugs replace 'em with plain, non-resistor plugs (Champion D21 or equivalent). And if it has RFI supression (resistor) plug wires replace with solid copper core wires. Reason: Magnetos do not throw their best spark with resistor plugs and wires. If that doesn't do it suspect the mag itself. Again do the easy stuff first: Clean (or replace) and regap the breaker points. Make sure the cap and rotor button are clean and in good shape. Check the mag is properly timed (impulse trips at exactly TDC when the crank is turned slowly by hand and the spark advances about 25 deg before TDC with the engine running.) If still no joy try swapping with a known good mag if you can. Good luck!
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