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Hello. My name is Tan.
couold I get the engine serial number please?
Have you checked for spark on all cylinders?
When you are getting on plane choke the motor does it pick up and run? Squeeze the primer bulb when getting on plane. Does this help.
When was the last time the boat ran correctly?
Ok we are going to have to get a timing light and check that the cylinders are firing under load. Connect the timing light to the top cylinder run boat watch the flash of the timing light. The flash must be steady with no dead spots. If no misfire then move to the next cylinder. Do this test on all cylinders. If you find a misfire move that coil to another cylinder where there is no misfire. If the misfire moves then the coil is bad if the misfire stays then we have another failing component.
It can cause the stator to get real hot and cause ignition failure. But this would be a more dramatic failure.