Pete..... ..you write..... ."could there be something with the manifold that is causing air to be forced backwards?..... ..giggle, giggle, snort, ahrummp, koff, koff..... .sorry.....Unless your starter motor suddenly gott an internal re-wire job, yer engine will ALWAYS TURN CLOCKWIZE. It ain'chur carb and it ain'chur valves, its yer sparkies. PROVE yer sparkies will jump a 3/16" gap with bluesnott authority. Take enny ol'sparkie and bend the side electrode out for a full 3/16" for a precision sparkie tester. Clamp the metal shell to enny convenient bracket and plug enny sparkie wire to top of tester. With ignition ON, crank yer starter motor and watch yer sparkie gap. My eazy starting 6-volt 8N will jump a full 3/8" gap. Iff'n I hadda guess, I'd guess yer frontmount points have SLIPPED (gap = 0.015") or the points have INVISIBLE contaminates and need to be polished with strip of brown paper grocery bag ...or... dollar bill pulled between the closed points. New points, $5 (cheap). SHORT 3/16-32 points screw with invisible wear. $0.50 (cheap) Now REPLACE yer FLOODED sparkies with NEW DRY sparkies. AutoLite 437's are recommended. (gap = 0.025") Why? Ennytime yer engine don't start and you start crankin, even thought you think yer sparkies are dry, you done FLOODED them with INVISIBLE no-lead contaminates. And the ONLY WAY to gitt'chure lazy sparkies to jump the gap is by replacing them with CLEAN DRY sparkies. NO, you don't throw yer dirty flooded sparkies out. After your engine is running good, you replace flooded sparkies one-atta-time in HOT ENGINE to clean and dry and SAVE for the NEXT time yer engine don't start..... ....Dell, yer self-appointed sparkie-meister
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