View Full Version : Knock Sensors on Indmar 5.7 EFI - causing Reduced Power Mode?

05-24-2011, 05:09 PM
In my attempt to ready the boat for water this year, I put the knock sensors back in, but the block threading was quite rusty.

They only went in about halfway down the thread on the sensor. I didn't want to over-torque them and snap one off in the block.

I took the boat out the next day and found it was running in reduced power mode, wont rev over 3000rpm

Will the knock sensors haved caused this running issue?

05-24-2011, 05:28 PM
Take it to a dealer and have them scan for codes. They will be able to tell you exactly what the problem is. Stop wasting your time guessing what is wrong.