merc help

[salvagefirst]

i have lost 2 cylinders on my 89 seacraft 200 merc carb motor,both on the left bank,replaced batteries,filters,changed plugs,compression reads 115 to 120 on all cylinders even switched the powerpacks around without a differance.pulled the plug wires one at the time all had good blue arc. Winter fishing it would not get up on plane till after about 5 minutes then it would start hitting and run fine the rest of the day.could bad reed valves cause the problem? Thanks Les

[Fr. Frank]

Try moving the coils around. Sounds like an open circuit, where the gap closes as the motor heats up. See if the problem moves with the coils.

[salvagefirst]

switching the coils around didnt help,so i run a can of merc carbon cleaner thru the motor and run it hard for 15 minutes. i will know tomorrow when i try it.Im wondering if hotter plugs would help.

[Bigshrimpin]

stator is toast (Highspeed coil is shot). Test it with the multimeter . . . you can find instructions online or in your manual.

[Snookerd]

stator is toast (Highspeed coil is shot). Test it with the multimeter . . . you can find instructions online or in your manual.

Listen to Big. I replaced a stator on one of my Mercs last year.

[Bigshrimpin]

Is your motor a 88 or 89 200. Does it have the 40amp stator with the water cooled voltage regulator? 89 will have this style . . . 88 has the old 16amp stator and tiny voltage reg. If you need an 89 40amp stator . . . I have 3 of them. Will sell for cheap PM me after you test yours.

[Fr. Frank]

I agree. Listen to Tim (BigShrimpin).

[gofastsandman]

Hotter plugs can lead to preignition/detonation. Please don`t do that. The heat range of different plug brands also don`t correspond correctly. I only run Champions in my Rude because of this. Factories know best!
GFS