1986 125 hp.Force #2 cylinder not firing.....

[gekobvc]

I have a 1986 125 hp. force engine and it is only firing on 3 cylinders, I have new coils,and compression checks out ok on all .the Model # is 1251x6b and the serial#is 2456.any help would be greatly appreciated

 

[12Footer]

Re: 1986 125 hp.Force #2 cylinder not firing.....

It could be the trigger or switchbox, if the plugs and coils are good. switch the coil inputs,to see if the problem moves. See manual for more details on this and other trigger and switchbox diagnosis. Check all wire connections first tho, as they are very suceptable to corrosion.<br />One other tip...Operate this engine on dark night,and look for arcing from anywhere on the ignition circuit.

 

[Olson]

Re: 1986 125 hp.Force #2 cylinder not firing.....

gekobvc<br />I also have a '86 125 HP Force. What you're describing is nothing new to me. Only difference is that I've had #4 cylinder not firing at least two times in the past. One time, it turned out to be the coil, another time it was the CD pack that went bad. Force Outboard Repair manual states that both #1 and #2 or #3 and #4 cylinders not be firing in order for the one or other CD pack to be bad. Not true. CD pack has gone bad on my engine with #3 cylinder with good spark and #4 cylinder with no spark. You may have a bad trigger point, but I doubt it. In the sixteen years I've owned my engine (bought it new), the trigger points have never gone bad. I've replaced CD packs many times.<br />Would you know if the #2 spark plug boot ever came loose from the spark plug? If so, for a small cost, you may want to invest in a new set of spark plug boot kits at a Force parts dealer. After time, plug boots become stretched and don't stay connected to the spark plug firmly. Due to vibration and impact, it is good to check the connections regularly. If you need a CD pack, you can order online at www.seilermarine.com They will give a two year warranty and the price is less costly than a dealer.

 

[gekobvc]

Re: 1986 125 hp.Force #2 cylinder not firing.....

Thanks Capt.Allen, it is good to know that Im not the only one that has the same problems with my 125, you have been a great help to me and i appreciate it as well.I will use your advise and let you know how i make out.ps.thanks for the link ..