How about more info about the engine.
Brand, HP, carbed, permanent tank/6 gal. tank... ect.
Lot of time when the power pack goes out, one or more cylinders won't fire, or it won't start at all.
This sounds like fuel to me.
Could also be a flooding issue, if it is carbed.
If it is the newer electronic fuel injected and electronic ignition, it will be tough to figure out without a computer hooked up to it.
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