My leaf blower quit yesterday....no spark. I put in a new coil...acutally two of them still no spark. The kill switch is not even hooked up. To kill the thing I pull the plug wire. I took the whole thing apart and even checked, and cleaned the flywheel....yes it is still magnetic. Any one have clue?

Thanks, Tony

 

how is your coil gap?

 

Really haven't a clue! I just guessed....probably like say a quarter....a coin!

 

Pickup on the flywheel, broken key on the crank shaft, excessive gap at the pickup, bad plug but.....since you pull the plug wire to kill it, I'd start there.

 

I think I would want to see dime thickness of a gap or less. What brand blower is it?

 

Redmax Model EB7001

Thanks

 

It was running, and just slowly died....I thought it was out of gas, but no it was dead.

pickup on the flywheel....I'm clueless as what this is.

broken key....I was thinking this thing is keyless In my search for answers I did come across some info that said if the key was broke it should still spark, but not fire. I've got nothing.

excessive gap....I'll check

bad plug.....new plug, new wire comes on the coil

Thanks

 

high school shop teach and my ol man taught me (when points were still around) that in a bind, a matchbook was a great gauge to set points and get ya home. a quarter is too large of a gap. reset and try it.

 

Alright, Thanks

 

(1) what are matchbooks?
(2) That was what,about .012 Chris?

 

I used the matchbook trick many times, it was more like .017

 

you know what points are but have to ask about a matchbook???

anyway, yeah, I think a coin thickness is way too much too... tighten that gap, your get a hotter spark to light off the fuel.

by picking up on the flywheel, you will see if there is any end play to see if the magneto is getting out of line with the coil and weakening your spark. It will also tell you if you have a failing bearing.

 

See you learn something everyday! I figured the more gap the more spark!

Thanks

 

closer gap in the coil induces more power. Think of it as running two magnets near each other. the closer you get those magnets as they pass, the harder they push apart. your coil is working just the opposite as an electromagnet. the closer you pass it to the magneto, the more power is induced in the coil.

spark plug gap is a trade off. bigger gap will give a long, thin spark, a shorter gap will produce a thick, hot short spark. too little gap will not last long enough to light the fuel.

 

To understand this better google Charles Kettering, he was the inventer of the point/ coil ignition system, did you replace the condenser (capacator) when you replaced the coil.

I usually set the coil to flywheel gap using a matchbook cover or a piece from a manilla folder, tighten it down then remove it don' use anything magnetic.

Coil/ magneto systems do not produce very much spark at cranking speeds.

Jim