Most Likely Out Of Time.
mini stepping motor
because you have to much gas in the motor
boat with an inboard motor
From my research it is not expensive to replace a stepping motor in a printer. They cost between 10-40 dollars but you might want to get a professional to install it
Absolutely
It might be overfueled but it also might be just that when you turn the key off the motor runs on a bit and puts fuel into the hot exhaust and it ignites it and makes it backfire.
You may want to have the engine timing checked?
No. It's purpose is only to prevent fuel from entering the main jet and emulsion tube. If it were defective, either the motor would occasionally backfire (stuck open) or not allow the motor to run (stuck closed). Either way, the motor would still turn over.
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A leaking spark plug wire can cause a backfire out of the intake, but the most common cause is a burned intake valve. A burnt intake valve will allow leakage during the compression stroke back through the intake causing a popping backfire out of the intake manifold.
Possibly you have the spark plug wires connected incorrectly on that side of the engine. Timing can also be off.
Graham Richard Barber has written: 'Modelling and control of a Hybrid stepping motor'