stihl chainsaw has no spark

My MS290 chainsaw has no spark. All the wire leads coming out of the mag. read grounded on my meter. Whats next.

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Reply to
rick rodgers
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turn the switch on.

Reply to
Steve Barker

Check the switch.

Reset the magneto. Clean the rust off the pickups on the magneto and flywheel - this probably doesn't make any difference, but it makes me feel better.

Make sure you have a good plug.

Reply to
DanG

next.

IMHO, you are not testing it right. Clean off the mag and flywheel. Put in a new spark plug, but don't put it in. Make sure switch is on. Have wife hold spark plug in one hand, and the metal cylinder part in the other. Pull HARD to see if you get a good spark. Works with brothers-in-law and smartass teenagers, too.

Steve

Reply to
SteveB

Take it to your nearest licensed Stihl dealer for repair. No user serviceable parts inside.

Reply to
mkirsch1

Makes me feel better too ;-) I always put a little motor oil on it to help prevent further rust.

Not sure what you mean by "reset the magneto" but sometimes the "air gap" is off and needs to be readjusted. This is the space between the ignition coil/module and the flywheel. If you don't have the specs for the gap size I've gotten good results many times by simply using a thin card or a piece of paper folded twice and spacing it that way.

Other possible causes are: spark lead shorted to ground, kill wire shorted to ground, and if it's old then a bad condensor or dirty points or points out of adjustment. If it's an electronic ignition module and it's not shorted to ground and the air gap is OK then I'd say it's no good unless, for some strange reason, your flywheel magnet lost it's magnetism. Beating on it with a hammer to remove the flywheel can supposedly do that.

Reply to
Ulysses

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