Spark only comes from fwd pug wire, no spark to rear

niteridder64

niteridder64

Location
Tampa
I have a 1995 blaster 1 61x. Been seizing the rear cyl a few times now. Just refurbed top end, pressure checked, new sbn 46 and went out to ride. Sounded rough and different, went to get on it and bogged, came in looked at the plugs and rear plug looked like I just took it out of the box. Even compression 180psi. At night pulled both boots off. plugs out. motored over and pointed fwd lead to bold, spark jumped half inch/ Did same w/ rear. no spark at all. Ohmed thru sec coil and got 4.3 k right in the middle of range. I replaced this coil w/ an after market one about a year ago. inner electrode looks perfect, even cut a quarter inch off. Both boots ohm at 4.9 k . I have not broken into the e box yet to get the primary reading. I just dont understand it, both plugs fire at the same time at tdc and bdc so spark is getting to the coil, if it ohms good why is it only coming out of 1 lead? Please help if you can, thanks.
 

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Myself

Myself

manic mechanic
Location
Twin Lakes AR
There's likely a break in the plug wires somewhere. Electricity finds the least resistant path to ground. If there's a break somewhere the spark has to jump. The more load, the worse it gets. You can put new plug wires on an old oem coil.
 
niteridder64

niteridder64

Location
Tampa
I think I will buy an oem coil first. Am I right by saying that if I am getting a strong spark up front that the flywheel,stator coil and cdi are good? BTW that first pic is my old eng.
 
niteridder64

niteridder64

Location
Tampa
That's what I thought but I got good ohms thru it. But I also know that you can still get continuity even if all but 1 wire in the strand is broken. What I really need to test it with is a megger that is the true test of the health of a conductor. Like I said, I will buy a new oem coil and update my results.
 
niteridder64

niteridder64

Location
Tampa
Installed a new msd coil, problem solved, both cyl fire. Sometimes elec parts are hard to t/s as I was getting good readings from the old one and when I say old it has been in the ski for a year- note to self- do not buy cheap aftermarket crap!
 

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WFO Speedracer

WFO Speedracer

A lifetime ban is like a lifetime warranty !
Location
Alabama
I know a lot of guys used to use Polaris coils also but I have no idea what they were off of, I do know the wires were not glued into the coils on the Polaris .
After doing some research the coils they were using are off a Polaris Snowmobile, I put an Ebay link below , it is not for an OEM coil but the part number in the link is correct.

www.ebay.com

Polaris Indy XC SP 440, 2000, Ignition Coil - 4060229 | eBay

Find many great new & used options and get the best deals for Polaris Indy XC SP 440, 2000, Ignition Coil - 4060229 at the best online prices at eBay! Free shipping for many products!
www.ebay.com
 
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