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If your tiller has sat for any length of time it may have stale gas and the spark plug may need replacing (not just cleaning). Always make sure all wiring and or connections are clean. You can check for spark by removing spark plug, insert it back into spark plug wiring, using a WOOD clothes pin to hold the wire, hold spark end of spark plug (holding the clothes pin only) on metal casing on machine, pull starter cord and check for spark. If you don't use a non conductive instrument such as the clothes pin you will get a nasty shock. If you have no spark it is time to change the plug. Always put your safety first! Hope this helps! Have a great day! If this doesn't work perhaps you will need more information.
First check for spark by grounding the side of the plug to the machine and looking for a spark to jump accross the gap.I have a deviced that goes between the spark plug in the engine and the spark plug lead that has a light inside it that is much easier to see. If no spark clean or replace the spark plug and look again.If still no spark you will need to replace the points and condensor which is normally under the fly wheel.
it has to be spark or no fuel feed remove spark plug lezaving spark plug wire check for spark if you have spark then you know it iseither fuel filter or carburator 9 out of 10 times carb needs cleaning
THE COILS ARE BOLTED TO THE VALVE COVER BY ONE 8MM HEAD MACHINE SCREW, REMOVE IT AND SLOWLY TWIST THE COIL BACK AND FORTH TO FREE UP THE RUBBER SPARK PLUG BOOT ON THE COIL FROM THE SPARK PLUG WHILE APPLING UPWARD PULL. AFTER THE COIL (DO ONE AT A TIME) IS REMOVED THE PLUG USES IS A 5/8" SPARK PLUG SOCKET TO REMOVE, YOU WILL NEED AN EXTENSION.
just an idea is there a lot of vibration on the cutting head as this can cause the problem or you might just have to replace the HT lead for a slightly longer one.
The simpliest way to test a spark plug is to put it in the spark plug wire of a known running machine. Crank the engine over and watch for the spark. We used to check them with an ohm meter from center electrode to the spark plug wire cap of the plug. The resistance should be 8 ohms or so but todays spark plugs have much higher resistances.
Standard spark plugs are not expensive but the "platnium" jobs are. Just get a standard plug and plug it into the spark plug wire.
if the spark plug is failing due to build up and you have to keep taking it off and cleaning it then you have some oil blowing by the rings causing the spark plug to get to hot and quit working, put a new spark plug in and then start it let it run for a few minutes then shut it off check spark plug if there is oil on it then you will need to overhaul the engine its not that expensive
hi mate replace wires/cables and put another spark plug in it could be spark plug fouling and try the cdi in another kx80 also replace hd lead from coil to sparky
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