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500 EFI running rough
We ran our boat 30 mins at 3200rpms, all gauges were fine the entire way to our stop. We slowed down to obey a wake zone and then started to run again at 4000rpm for 5 mins, all gauges were normal. Slowed down after those 5 mins to dock and lost the starboard engine. Engine would/will start hard but doesn’t sound like its hitting all cylinders. Any suggestions on where to start my diagnosis.
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As with all engines:
Start with: Scan for trouble codes check/test ignition components (when you remove each plug get a good look for water/lean/rich/etc) check fuel pressure check compression all cylinders |
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