Engine stopped and I am Stumped

I had a similar problem over the Christmas break. I was cruising at around 1,000 rpms and one engine started stumbling, popping and the exhaust smelt rich.

Cutting to the chase I put fresh fuel in it (over a year old......business has been busy!!) with Startron and changed the NGK Iridium plugs (5 years old) out for new ones. I didn't have any further issues for the next two weeks whilst we spent our vacation on the boat and cruising around. I had previously replaced the entire cool fuel module on that motor approx 5 years ago and the plug wires were replaced on both motors around 3 - 4 years ago.

I have also read where the disc filter in the cool fuel module can cause issues if it not changed and clogs up reducing flow as some don't change this filter (or even know about it) when servicing these motors.
 

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