B & S 450E weedeater push mower. Changed plug, still no spark
- Thread starter Talltree
- Start date
remove the engine/flywheel cover, remove the 1 small kill wire from the coil, recheck for spark.
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Might be easier at carburetor throttle control or switch as first test for ground which kills ignition
unplugging it at the ignition coil ensures the insulation is not broken and the kill wire isn't grounded to the frame etc.
removed wire. Now have spark. Now what?
ILENGINE
Lawn Royalty
That means that either the wire has a bare spot and is making contact with the engine shorting out the wire, or the kill switch itself has failed. And seems like that has the newer style momentary switch not the grounding tab style kill system, and I have seen a couple of those fail over the last few years.
Spark plugs don't make spark they just put it in the cylinder and ignites the fuel air mixture in the cylinder.
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Chase down the wire to find where center conductor touches ground and kills spark. You have problem in hand. Some sort of grounding device/switch or wire bare some place for OFF. Sometimes putting it back together and "all is well"!
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Also, you need VOM meter attached to measure for short on wire loosened from coil, and start wiggling things to find what remove the short like resistance of ZERO ohms.