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1985 mariner no fire on 246 cyilinders

G

greg holly

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seems to be switch box but not

seems to be switch box but not sure has a new stator. would not not think i could lose three coils at one time. a freind traced it to switch box but could a trigger cause 3 cylinders to go and the others to run fine it is 6 inline and was about 10 miles out when it just quit running right.did i hurt it going back to dock.seems to run ok just about half speed.
 
"The following applies to any

"The following applies to any twin switchbox setup including V6 and inline 6's...

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hello all i am looking for a s

hello all i am looking for a switch box for a 90 hp mariner serial#a150513 but all i see on net is ones to replace 3327778a12. the box off motor says 3327778a13.does anyone know if this is right box. thanks for any help.and should i replace both boxes or not
 
"Yes same box, just a newer nu

"Yes same box, just a newer number - I don't know for sure but get the impression that everytime Merc re-runs a production line, they change the number (at least at the end of the part number).

You could go all the way back to a 332-7778A3 and find the part to be the same..."
 
"I have a Mercury 90HP inline

"I have a Mercury 90HP inline 6, 1985 model. When I first start it up, it will run rough as if it is not running on all cylinders. After running for several minutes, you can hear and feel more cylinders cutting in and out. After several more minutes all cylinders will start cutting in, and then suddenly they will all continue to run properly. Once the engine is warm, they seem to be running fine. The problem seemed to get progressively worse through last summer with each visit to the lake, the problem lasting longer each time. What can be the problem? I've also always had a problem with the motor stalling when I give it full throttle when I try to pull up a skier out of the water. It seems I have to throttle up more gradually when uder a heavy load in order for it not to stall."
 
"its a carb problem, sounds li

"its a carb problem, sounds like a stuck float, flooding on start up. Take cover off, pump fuel bulb and look down each carb throat with a flash light. Any fuel dripping is bad. If a main jet is clogged or the carb hasn't been cleaned its lacking fuel to the cyl or cyl's that it feeds. Lack of fuel means lack of oil. Fix it quick. We always do a compression test and spark test to see how bad the engines been hurt for this reason."
 
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