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Message: <blockquote data-quote="RadarJet" data-source="post: 353742" data-attributes="member: 8862">Ran into an interesting problem this weekend on the river.  I was barely able to get up on plane going upstream, even when pushing the engine nearly up to 6,000 rpm.  I shut it down and checked for blockages and debris, which there were none, but noticed when turned off, the tach still read 1,500.  When I started it back up, even at idle it read about 1,400 rpm.  Since this is an EFI motor, I'm not sure how to adjust the idle, or even if I can.  I'm pretty familiar with motors, and just by listening, it was not idling over 800 rpm.  Could the Teleflex tach that is installed on this boat (new to me) just be off in calibration, and I was really only pushing 4,500 rpm instead of 6,000 rpm?  For a few seconds I did give it some extra throttle and trimmed up a bit, and it pushed easily to about 6,300, sounded great and gained a ton of speed.  Is this motor self protected from over rev?  Should I not be able to over run this motor with the jet?Thanks for the help.2002 Mercury 4-stroke EFI- OT5049072002 1652 Alweld Jet.  2- batteries, 14 gallons fuel, TM, and wife and child on board.</blockquote>