125 force year for model "1251F6A"

[seamoors]

Hello,
My first post; read through many and i have to say thank you for this very helpful forum.
I am troubleshooting my 125 force and have practically narrowed it down one of the switch boxes.
My question is, based on model of 1251F6A and serial of 1002, does anybody know what year and model (A,B,C,D,E...?) it is so i can locate the correct part? My guess is 1986, A.

Engine starts right up and runs, but warms up and misses and runs very rough at any speed. 140 compression all 4; inspected all wires and ground; checked resistance on coils - seem good at .3 ohms. Top cylinder spark is just a constant dull glow using an inline spark tester (as opposed to the beautiful, blue flash on other 3). I pulled top wire off while running = no difference. Pulled top 2 wires off... still no difference even though second cylinder shows good spark. I swapped coils and spark problem does NOT follow coil - so I'm hoping it's the switch box for top 2 cylinders (and not the trigger).

I was thinking of swapping switch boxes just to be absolutely sure when problem moves down to bottom 2 cylinders.

Any suggestions are GREATLY apprecaited and again, thank you for a very informative forum.

colin

 

[cordell]

Re: 125 force year for model "1251F6A"

Try swapping the the 1 and 2 wires on the switch box. If the low spark follows to #2 after the swap you will know for sure. Pretty easy to do the wires to the coil are quick disconnect then just swap the trigger wires.


cordell

 

[Dave K.]

Re: 125 force year for model "1251F6A"

'86

 

[seamoors]

Re: 125 force year for model "1251F6A"

thanks Cordell - i had tested the coils by swapping the 2 wires from the cd box to the coils and the problem followed the wire - sounds like that's the culprit. Searching for a CD box now for 1986 A.

looking forward to posting a resolution.

thanks again for speedy replies.

colin