Question about Garden
Homelite model number ut21004d, I need to know what spark plug fits it.
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Posted on Jan 02, 2017
You have to make sure the case of the plug is making good connection against the metal on motor. Use file or sandpaper to get good connection on the plug and the motor.
Posted on Apr 29, 2009
The body of the spark plug has to be "grounded" to the metal on the engine when you remove it and test it. If you did it that way, OK. If there is no spark then (and it should be a nice blue color, not orange or yellow), the the "air-gap" between the ignition coil and the flywheel needs to be checked. Some disassembly is required to get to it as these parts are under the front engine cover. The air gap should be around .010" (or about the thickness of a standard business card). If the gap is too wide, the spark will be weak. If the gap is too close, the legs of the ignition coil may slightly rub on the flywheel. If you indeed have no spark, after properly testing, then check the air-gap.
If this is a fuel related issue, post back and we will address that as well.
Posted on May 15, 2011
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