Husqvarna 125B Blower Ignition Coil Test 

Glad I ran into your video. My 125B would run for 5 mins then crap out. I yanked the coil and got very similar resistance Vs your old one. Ordered a new one. Helps also to know what the resistance should be on a new one. Thanks Alan. Useful video.

To test spark of a coil you need the spark to jump a much larger gap than what the spark plug gap is. I use a spark plug with the side electrode removed. If it jumps the gap to the side when you test it, it will fire the plug under compression. You can buy test plugs that are made that way.

Great video. I’m working on one and everyone says just check the spark plug. When mine heats up it stops working. Went through the fuel system and carburetor and nothing was wrong. Checked the module after it stalled and it’s WAY off. Got one on order.

I absolutely detest the design they went with for connecting the secondary to the spark plug on these. Only the second time I removed it from the spark plug (to verify if it was failing or not, actually) and the spring connector inside the boot pulled right off of the cable. It's just poor design overall to have it laid out so that you have to pull the starter and housing half off just to grip the boot for proper removal, but even then it came right off the wire and stayed on the plug, so on my only two-year old blower I'm already having to replace the ignition module since the wire isn't even long enough to crimp a new connector and boot onto it.

Thanks for the quick reply also my secondary coil reading is 1514 this was how it was shown on my meter when testing it I have ordered a new coil, to see if it fixes my problem but this is my first-time trouble shooting a coil of any kind my coil has spark but very little

Thanks for the video! I got one that has spark, but I suspected not enough due to good compression and has fuel. Looks like I'm on the right path.

Normally for Husqvarna the spark is comparatively very small compare to any other engines. The spark plug comes for blower machines., the very small size., it fails oftenly. Just checking the spark after taking it out we may find spark but won't start. Just change, it used to be OK.

My mistake didn’t see that you had fixed it. Having the same problem with a Husqvarna 223l.

for what its worth im 88 yrs old worked on all kinds also auto and outboards i have replaced 1 coil in my life it was on an outboard they just dont fail that often

The compression in the cylinder has an effect on a weak coil, just ran into the very same problem on a Echo SRM 225 weedeater....

Same here weak spark confused the whole mechanic school lol

It the only thing I haven't changed...on its way...starts hard runs till you throttle up to wife open then sputters and dies....new carb, filters, gas lines, plug, spark arrestor good....got to be losing spark

Great video however I have questioned the new coil you tested with the reading of 254.5 those that reading mean that the coil is good? I am testing my coil and it is reading 165.4 and I am not sure if the coil is good are bad, please explain

If you're going to do this test and do it right you're doing it on a Husqvarna leaf blower certain series get the numbers and put the numbers right down of what the call should read cuz everybody don't have a manual thank you

Thanks Alan for this video; I am working on a old Echo es210 blower/vac that has no spark. Can't find any specs on the coil A411000130 to do a OHM meter test. Looks like coil specifications can vary a lot depending on all of the different types of coils and their applications. Think I will buy a new coil like you did and see what happens. Either it will run or I just have to keep looking; kind of fun. Karl

Christ is king

Wouldn’t you check the old one out first before you bought a new one I don’t understand

That mean second coil is better...?

Well did it fix it?

The compression in the cylinder has an effect on a weak coil, just ran into the very same problem on a Echo SRM 225 weedeater....