Question about Yard Machines Tecumseh 148cc Front Tine Tiller #21a 251e000

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What is the gage that you set for the coil

My lawn mower will not start It will not even gets sparks.We are going to put on a new coil but do not know the gage to set it at

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Air gap between the flywheel and coil is.012

Posted on May 31, 2009

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I have a Toro Model 20070 Electric start Lawn mower. It will not start. I changed the plug and filter. I pulled the plug and there appears to be no spark. When I turned it over I saw no spark. I guess my...


check your mower for interlock switches that might interupt spark for safety reasons.

A chute switch or something like that. Check your owners manual for troubleshooting.

Unplug the keyswitch and try pull starting to rule out a bad switch.

If it still doesnt have spark you might need a new coil.

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There are several additives on the market for gasoline, but only a few of them actually help anything. If the additive is relatively cheap to buy, don't expect much results. Gas that hasn't been treated with fuel stabilizer that is a month or more old loses its volatility and can cause issues with engine performance, small and large.
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Lawn mower won't start


Carb is most likely gummed up and will need cleaning. Anytime a gas motor is store through a season, you should use a product called "stabil" in the gas to prevent gumming up. Also check that there is a strong spark coming from coil. To do this, remove spark plug, hook it up to the coil and set it on motor block and pull it over. You should see a strong spark. If you don't see the spark, then either the coil is faulty or the magnet from coil to flywheel is not getting good contact.

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1 Answer

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