Im running wot at 4000 then all of sudden it may jump to 3000 for a while then it might jump to 5000 for a while . Its always 3000 , 4000 , 5000 rpm at different times When wot and I can tell a differance in boat speed when it changes rpm's.
It still seems to run smooth at all three speeds.
What could be causing this.
It still seems to run smooth at all three speeds.
What could be causing this.