maxwell42 - Spark and Heat Issues

maxwell42

Recruit
Joined
Mar 4, 2020
Messages
3
Hello fellow boaters. I have a problem with my 2002 150 hp Johnson outboard motor. I lost spark to the top right spark plug from the coil. I replaced the coil and had good spark at all six cylinders at idle but when I put boat underway the hot light and buzzer came on and engine started missing badly. The engine was not over heated but I replaced water pump propeller, installed new spark plugs and checked compression on cylinders. All were at 106-108 psi. Ran motor again and it ran good but hot light and buzzer came on after 5 minutes or so. Engine began to miss again and would not rev-up above 12-1500 rpms. Should I have replaced all three coils? Should I replace my power pack and timing sensor? Or is this engine shot? HELP HELP HELP Thanks.
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,933
It thinks its hot or it is getting hot and going into SLOW mode. Check t-stats
 
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