Re: SM blows muffler apart!!!

Posted by Bob M on November 24, 2004 at 07:56:14 from (165.170.128.65):

In Reply to: SM blows muffler apart!!! posted by knauffj on November 24, 2004 at 07:25:28:

Sounds like weak ignition to me. If you haven't already, I'd replace points and condenser and swap in a known good coil (or replace the coil with a new one). Also if you have a voltmeter check the voltage between the switch side of the coil primary and ground with the ignition "on" and the engine stopped. You should see close to 6 volts. Less than 5 volts or so will cause problems like you are seeing.

I'd also check for a stuck or broken centrifugal advance inside the distributor. You should be able to rotate the rotor button about 15 deg or so CLOCKWISE under light finger pressure and it should spring return back easily when you let go.

Hope this helps!

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