Reply To: Mercury force 120 misfiring pics of spark plugs

[Beno]

Hey Fleetwin.. long time!   I say put back together let me be more specific..

This is a very pretty seaRay F14 boat (#a)  I got 120 horse powerhead (#A) imploded cylinder and needle bearings. I pulled off the stator flywheel trigger electronics coils all as a unit. Then I went and bought another similar jet boat (B) which had no spark. I checked the compression of B which was solid on all four cylinders, pulled the powerhead then trashed the boat (#B) but kept the power head.

So now i have power head block #B with electronics from #A in boat A

Honestly I didn’t think I was going to have a lick of trouble here. Since old powerhead #A had failed mechanically.. the thinking was that the electronics must be perfect. .. but i guess im wrong?

Today’s plan is to get the multitester and test the trigger ohms.. test the stator.. and then start testing the coils..

It’s interesting that I have never seen one of these Mercury forces without resistor plugs and i realized there are regular plugs in this one so I’m going to swap those off for resistors if I can find some.

 

 

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