Not Ranked
I have found that on really HOT motors (HP not temp) they don't like to crank right after shutting off, such as when you are at the gas station and just finished fueling up. These are 11:1 and higher compression, and needed a hi-torque starter to overcome this. The regular starter would do the job fine if you didn't mind waiting five minutes for the engine to cool off a bit. It wasn't a spark advance issue either, removing the coil wire did nothing to alleviate the motor's resistance to ranking over. This was after verifying all electrical was OK. Just that some motors were on the ragged edge of needing a hi-dollar starter motor.
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In a fit of 16 year old genius, I looked down through the carb while cranking it to see if fuel was flowing, and it was. Flowing straight up in a vapor cloud, around my head, on fire.
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