79 ex440 no spark one cylinder

J

jclee71

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Joined
Feb 26, 2005
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46
Location
New Jersey
bought a 79 exciter 440 for kids, cleaned carb and fixed choke plunger issue and got it running but only on one cylinder, clutch side cylinder seams to not be getting spark, guy i bought from said he replaced stator few years ago, please give me steps to resolve, i will check compression which i believe is good, then what steps?
 
If it is indeed a spark problem you are having with the cylinder in question, it will be either the coil or lead from the stator to the coil, or the HT lead from the coil to the plug boot, or the plug boot or the spark plug. ;)!
 
On a 91 Phazer I picked up previous owner thought it was spark and even put a new coil, but it turned out the choke was sticking just enough to keep that cylinder flooded. I pulled the cable off of the choke and used a small screwdriver to hold it seated and after a short time it picked up on that cylinder. Maybe the rubber seat had just gotten hard from being over 20 years old.

Cabmkr
 
cabmkr said:
On a 91 Phazer I picked up previous owner thought it was spark and even put a new coil, but it turned out the choke was sticking just enough to keep that cylinder flooded. I pulled the cable off of the choke and used a small screwdriver to hold it seated and after a short time it picked up on that cylinder. Maybe the rubber seat had just gotten hard from being over 20 years old.

Cabmkr
Click to expand...
Yep, I have seen that many times myself. The 79 Exciter in this case is a single carb motor though.
 
Ok I actually have spark, in both cylinders, I even swapped out coil with one from my Enticer and nothing changed, still only running on mag side, so I squirted a little fuel in pto cylinder and tried to fire with just that plug hooked up and nothing, so now I quess it's a compression test and probably a problem with that pto piston, any other ideas?
 
You have a hole in your piston. Probably a bad crankseal or a mouse nest in the fan shroud caused it...maybe both. If you dont have a hole in the piston, the rings are most likely pinched in the ring lands and was on its way to holing a piston.
 
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