Mercury Pro XS XL 250 2013

by Kirk
(Michigan)

Launch the boat it starts and runs fine I run out to my fishing spot fish for a while and the engine just turns over but won't start.

I've had this problem on and off for the last 2 years the motor has 275 hrs on it.
Sometimes if the motor sits for 1/2 he it starts right up and runs fine. It's run fine all summer went fishing yesterday and the same thing happened my graph and voltmeter show 12.3 volts it's not starving for fuel and has spark. I'm at my wit's end and tempted to just replace the motor. My dealer can't seem find the problem and it's not throwing any codes. Can anyone help please.

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