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#1
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Help with 200hp merc running rough.
1992 200hp black max.
Just got it in the water today first time this year. Mods I did this winter. Added 2nd fule tank, but have not used it. changed stator and voltage regs, they didn't go out on me but the few windings were loose so I replaced it before it fales me. Did power packs last summer. It is running rough, pulled wires off when running and no change or not much if any change when I pull off the bottom left and bottom right spark plug wires. you can for sure tell when I put the other 4. Idles a bit rough but not to much different that it ever ran. But won't get above 4K rmp and it sound like it's missing a few cylinders. Any thoughts where I should start???, Spare I'm in MT pleaseant have any time to check it out? Thanks 
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#2
06-26-2011, 08:06 PM
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I'd be happy to look at it for you, just not this week, I'm slammed
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#3
06-26-2011, 08:18 PM
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Thanks, I dragged it back to Greenville, I'll see if I can tinker with it through the week.
I checked spark on all plugs, they looked good. Wondering if because it sat for 6 months without running if the carbs are gummed up, and if that would make it run rough? I did put fresh gas in it. and changed the filter on the water seperator. let me know what you think. Thanks
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#4
06-26-2011, 09:59 PM
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90% of what I've been doing this year has been carb rebuilds/fuel injector issues/ fuel systems. I think you are on the right track
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#5
06-27-2011, 01:40 AM
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Have you run a compression check yet? If they are all near each other then I'd suspect dirty carbs...
__________________
1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer 1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer 1996 V21 w/1993 200HP Mercury on a Shoreline Trailer All towed by a 5.7L Hemi Durango. If God didn't have a purpose for us we wouldn't be here, so Live simply, Love generously, Care deeply, Speak kindly. (Leave the rest to God)  Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
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#6
06-27-2011, 11:44 AM
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Bad new stator CDI, I put my old stator back on and runs great.
I put a new CDI stator on as my old stator was still working but one side of it must have got realy hot at one point as the wires were discolored, and a few coils were loose, Preventive maintenance bit me in the but, trying to head off any stator issues, and with the new one was no good going to the power packs, my voltage when running was about 14v so I guess the charging part was ok. They are sending me a new OEM Merc stator as a replacment, we will see if this one works. thanks for the input.
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