New member and need the knowledge of this community.
Have 2020 200hp Pro XS. 57 hours. Only run ethanol free gas. I keep the tank topped off and boat is stored inside.
Boat has an rpm surge through entire rpm range. Idle set at 600 rpm. Rpm drops to 580 and goes up to 620 on about a 15-20 second cycle.
Same thing for all rpm ranges on plane. Drops about 80 rpm and surges about 150 from steady throttle setting.
Water in gas has not been indicated.
Changed fuel filter. No indication of water.
Cranking battery load tested and good.
Vessel view indicates no faults.
Dealer laptop indicated no faults.
Will pull and check plugs next.
Any ideas after that?
Hate to pay shop labor rate for troubleshooting.
Thanks in advance.
Have 2020 200hp Pro XS. 57 hours. Only run ethanol free gas. I keep the tank topped off and boat is stored inside.
Boat has an rpm surge through entire rpm range. Idle set at 600 rpm. Rpm drops to 580 and goes up to 620 on about a 15-20 second cycle.
Same thing for all rpm ranges on plane. Drops about 80 rpm and surges about 150 from steady throttle setting.
Water in gas has not been indicated.
Changed fuel filter. No indication of water.
Cranking battery load tested and good.
Vessel view indicates no faults.
Dealer laptop indicated no faults.
Will pull and check plugs next.
Any ideas after that?
Hate to pay shop labor rate for troubleshooting.
Thanks in advance.