MERCURY 2008 25EFI 4 CYCLE

[bradley_s]

"I HAVE AROUND 20 HOURS ON NEW

"I HAVE AROUND 20 HOURS ON NEW MOTOR,I FOLLOWED RECOMMEND BREAK IN. IT IDLES AT 1000 RPM'S, ROUGH, AND BANGS "DETONATES" AT SPEEDS OVER 5000 RPM'S,
DO THESES MOTORS NOT HAVE KNOCK SENORS?
APPRECIATE ANY HELP.
THANK YOU"

 

[galamb]

"Your motor's ECU (com

"Your motor's ECU (computer) is controlled by three sensors - a crank position, engine temp and oil sensors.

It sounds like your CPS (crank sensor) is bad.

This is a new engine, take it back to Merc..."