1990 90 horse force lost 1st cylinder

[wkraus]

With all the knowledge on this site, i'm sure someone has heard of this. From my reading so far, it seems I will have to get a friend over to test spark. Here goes..
1990 bayliner capri 1800. Took it out this weekend and had 6 people in it. Ran fine, just slow. About 25 mph and took forever to plane out. After I dropped them off, I ran around myself and hit 38 and it revved much higher. Then it started. I started turning and it was like it died for a second and popped back on. It continued to do this until it was doing it when I was in a straight line. When I would hit the throttle from a stop it would lunge forward for a second like it was fine then go back to running rough and at about 10mph. We took the plugs out and the top one was somewhat wet, while the bottom 2 were nice and dry. We went and got new plugs, poured in some seafoam and tried it again. It is now to a point where that top cyclinder isnt even kicking in like it was. It will for a split second when you turn the boat sharply into a circle and go back over the wake. Is this because it briefly takes it off the load? Any help or insight is greatly appreciated!!! Thank you in advance! Bill

 

[jerryjerry05]

Re: 1990 90 horse force lost 1st cylinder

Start with a compression/spark test.Then check all electrical connections from the stator and power packs.Post the results.J

 

[wkraus]

Re: 1990 90 horse force lost 1st cylinder

Of all things it was the top carb. I thought for sure it was gonna be electrical. He had just cleaned them so he cleaned them under warranty. Still having problem with my tilt trim valve body. My stupid *** took it apart and now I have ball bearings and springs with no clue where they go. Or what I even need to replace. I will start a new thread to see if anyone knows. THanks!!!

 

[roscoe]

Re: 1990 90 horse force lost 1st cylinder

""We took the plugs out and the top one was somewhat wet, while the bottom 2 were nice and dry. ""

You don't want any of the plugs to be dry.

Dry is NOT nice on a 2 stroke motor.

It will die and early death.

 

[essie]

Re: 1990 90 horse force lost 1st cylinder

Gentlemen feeling alone at sea. I also have this issue but it not the top cylinder it is the bottom cylinder. I have went as far as replacing the main controll (CDI) and still have the issue. 35 hp 1991 Force. I know I am getting good spark, compression. Could it be the reed values? Why I ask, is I found chunks of rubber from the prime balls and fuel line. Your help is greatly appreciated.

 

[thundercraft84]

Re: 1990 90 horse force lost 1st cylinder

gentlemen feeling alone at sea. I also have this issue but it not the top cylinder it is the bottom cylinder. I have went as far as replacing the main controll (cdi) and still have the issue. 35 hp 1991 force. I know i am getting good spark, compression. Could it be the reed values? Why i ask, is i found chunks of rubber from the prime balls and fuel line. Your help is greatly appreciated.

had same issue with my 90hp 90 force on # 1 cylinder no spark replaced coil plug wire still nothing wa about to replace cdi pack and found broken wire going to cdi from ground!! Ran like a champ after so check wires and on mine had a rubber booty on wire where end clamp attached to ground so its hard to tell if u have a broken wire ..... Well $100 bucks down the drain but coulda been worse hope this helps

 

[wkraus]

Re: 1990 90 horse force lost 1st cylinder

I had the carb jet suck up a piece of dirt and plug it. While it's running spray carb cleaner in the carb of the dead cylinder. See if that works. Then u know it's fuel. The 1st problem I had the beginning of the year I had spark all 3 and fuel so it didn't make any sense. We tried the carb trick and it did nothing. Then he dug deeper and found a diaphragm on the side of the motor that had a pinhole in which was leaking so much gas in that cylinder it was so flooded even carb cleaner wouldn't fire it. If u need you can message me and I can help you out more or you can call me. I know how frustrating this can be!!