Mercury 120XR Sport Jet 1996- No Spark

[Legendoerre]

Hello,

New to posting on this site. Recently purchased a 1996 Sea Ray F16 with a Mercury 120XR Sport Jet motor. Have been unable to get a spark from the spark plugs. Have verified that the on/off and safety switch is operating correctly with a multimeter. It also appears that this boat has been fitted with the red stator which I understand is the replacement for the black original one that experienced issues. Any advice as to things to check or where to go from here? This is my first boat and trying to get it up and running soon. Thanks!

 

[Cobra Jet Steering LLC]

maybe this will help Search results for query: mercury force engines

 

[Legendoerre]

maybe this will help Search results for query: mercury force engines

Hi Cobra,
Thanks for the specified search result. Have been reading a lot of your postings as well to try to get a better handle on some of the things this engine runs into.

Also will add that I have tested the rev limiter to see if this was limiting spark by temporarily disconnecting it and this had no effect.

Will keep reading as well, hoping to find something soon and get out on the water. Thanks!

 

[Legendoerre]

Next step I am planning to take is to replace the voltage regulator and the brains of the ignition system. Have read that a bad voltage regulator could allow the current to burn out the CDM Module Ignition Assembly.

 

[dbz28]

Try upluging the rev limiter

 

[Cobra Jet Steering LLC]

The engine is actually a 4 cylinder force outboard power head converted to work on a jet and the magnets come loose in the fly wheel the regulator is a big problem as it is not really a regulator but a electrolytic capacitors and when the engine is shut off it can allow bastard voltage to go to the brain and burn it out So read all the posts I made years ago and hopefully you replace the regulator to avoid future failures but that won't fix the brain if it is bad it will just keep it from blowing out the new one