One typical cause of a weak starting spark yet still an excellent running spark IS A WEAK MAGNETO IMPULSE SPRING or else the start timing is a tad late. It should make a loud sharp SNAP when the impulse trips NOT a faint dull clink (weak spring) and the impulse needs to trip RIGHT AT LHI TDC. If too fast she kicks back but if too slow hard to start. If you turn the flywheel the impulse must trip when the LHI is even with the flat mark at 3 o clock......... no later no sooner.
If the ignition (good spring) and timing LHI at 3 o clock with good loud sharp SNAP Id check carbs idle and adjustments. My 38 B with a Wico X Mag likes to start at slow idle on throttle and don't over choke and flood
Try a new set of the hotter deep reach side wire electrode Autolite 3077 plugs versus the 3076
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Today's Featured Article - It Can't Be Done! - A Tractor Story - by Neil Campbell. I'll never forget the time back when I was a boy baling hay on our Farm in Big Rapid, Michigan. The most memorable event that took place was a trip up the steepest incline on the farm pulling an old New-Idea baler with a pony-motor for power and a haywagon. I had just talked my Dad into buying an old John Deere B with 6-speeds ahead and I was real proud of it, except it was a little smaller than the Case tractor that we normally
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