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Help - Engine not getting to full RPM intermittently

bamski

Active Member
Messages
2
Reaction score
0
Points
40
Boat Make
Yamaha
Year
2005
Boat Model
AR
Boat Length
23
I can't seem to get full throttle from my Starboard engine on my '05 AR230HO. Only revs to 9k (Port will do 10.5k). It does however kick in and rev up to full throttle very intermittently.

I've already replaced the plugs, checked / removed the air filter, cleaned and checked each injector to the ohm spec, checked that I'm getting full throttle.

My next thought is to swap ECUs between engines (not fun).

History: I had the starboard ECU rebuilt in the fall of '17 for keeping a valve open and no problems for 2 summers. The Starboard NoWake intermittently does not work.

Any help would be very appreciated.
 
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