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koates · 12-02-2021, 02:09 AM

I think there is some confusion here on your part regarding SLOP in the dist shaft and cam. Rotational free play can be a normal thing and vertical up or down movement a small amount is OK. What is critical is sideways movement which effects the point opening and cam angle and can vary the spark timing. This kind of wear is caused by worn bronze bushes that the shaft rotates in and also the shaft itself could be worn. So SIDEWAYS LEFT to RIGHT movement is what you are testing. No more than about .002" is OK. Check the ohms primary and secondary on your coil and also the current in amps draw of the coil primary with the engine at idle speed. Should be only about 3 amps. Regards, Kevin.

12-02-2021, 02:09 AM	#11
koates Senior Member Join Date: May 2010 Location: Melbourne Australia. Posts: 2,081	Re: Distributor issues I think there is some confusion here on your part regarding SLOP in the dist shaft and cam. Rotational free play can be a normal thing and vertical up or down movement a small amount is OK. What is critical is sideways movement which effects the point opening and cam angle and can vary the spark timing. This kind of wear is caused by worn bronze bushes that the shaft rotates in and also the shaft itself could be worn. So SIDEWAYS LEFT to RIGHT movement is what you are testing. No more than about .002" is OK. Check the ohms primary and secondary on your coil and also the current in amps draw of the coil primary with the engine at idle speed. Should be only about 3 amps. Regards, Kevin.