2005 E-Tec on a 231 Proline CC - When i trim up the motor as i'm getting up on plane the RPM's drop 2-300 rpm. this is a new. no mechanical work has been done in the past 60 days. Do I have a poor ground or bad connection that could cause this? Thanks
Do you notice a drop in power, or is it just the gauge reading the drop? does it return to normal after achieving plane? Loose/corroded wires and connections are almost always a good first check when sussing out a glitch.
Possible Cause 1: There is a low-oil sensor designed to drop you into safe (low RPM) mode. If your oil reservoirs are less than 1/3 full, this sensor may be triggered momentarily while the boat is inclined while achieving plane. Of course a second later you are running level, or nearly so.Try filling your oil tank and see what happens.( recommended to keep these 1/3 full )
Possible Cause 2: Throttle Position Sensor. You can use a multimeter to check the resistance of this. Readings should be listed in your manual.