1999 200 EFI After Fishin half of the day and then not staring

[shakey14]

My 1999 murcury 200 EFI Would run good to the first few fishing spots then it was like the kill switch is pulled out but it wasn't. Took the oil injection off several years ago and mix my own gas. Murcury mechanic said it has spark some time and some time it doesn't the the spark would come back. Good compression 118 and above on all 6, new plugs and wires, new low pressure fuel pump and new fuel/water separator. Anyone have any ideas! Thanks

[acesover]

See the post above this one...

[EuropeanAM]

Moving your post to the 2.5L Forum for you.

Please be sure to update your post to include the engine Serial Number.

If you have CONFIRMED there is NO SPARK at the spark plugs when this happens (DON'T ASSUME... TEST AND BE SURE):

Start unplugging CDM's one at a time, recheck for spark. If spark returns, that CDM likely has a shorting stop-circuit diode.

Most testing beyond this will require a Service Manual and meter with a DVA.