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Re: There is no fire to the spark plugs but will turn...
First replace the spark plug with a new one. Then check the wires from the positive terminal on the battery to the coil and then to plugs. Put a 12 volt tester on the positive wires and the battery ground or any metal on the engine to see if circuit is hot. Hope this helps. Make sure you test the plug wire as well.
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remove spark plug boot just unscrew it put the bare plug wire next to eng case and check fire if it sparks boot is bad. could be kill sw or coil no good (magneto)
AN engine need three things to run: Compression
Timed spark
Fuel
now.....
1*. Check the spark plug to make sure it is firing.. remove the spark plug.. make sure you have metal to metal contact and then turn the engine over.. (this might be a two man job).. the spark plug should have a nice big blue white spark,,(some electronic's will have a weak orange and still fire fine!)
2. Make sure you have gas in the tank and (going into the carb/FI)... (have to ask-actually have had 3 bikes in my career come in complaining -won't start...!! Add gas and they ran.. WOW!.. never charged any of them....the embarrassment on their face was payment enough!)
3*. While the spark plug is out... place your finger over the spark plug hole firmly .. keep the spark plug cap away from your hand..turn the engine over and see if it will blow your finger off..(it should blow it off the hole easily).
If any one of these three are not nearly perfect.. you have an issue!!
I first check both spark plug and coil.. Pull spark plug out and visually inspect for any dirt touching both electrodes... Next, Plug the spark plug back into the spark plug lead and earth it to the motor(make sure the spark plug is touching metal)then try turning the motor to see if the spark plug is sparking...
Also the link below is a short YouTube video showing the right colour spark and I never thought about it but it should spark over the top of the centre electrode, How to check for Spark Plug Fire in any engine
If it does spark then it's a fuel problem. Check the needle and seat in your carby, You need to pull your carby off and unscrew the bottom half from the top, 1st sign of a needle stuck inside the seat
is a dry carby There you'll find the float, push the float up and down and see if the needle above
the float slides up and down from the seat, If the needle stays up then it's stuck and NOT letting
the fuel into the carby, Just pull it down with your fingers to loosen it up..I hope this helps.... CHEERS..
pull spark plug, lay it on engine while still connected and hit starter and see if any spark at plug. if so fuel issue,if sat for any lengthy period of time, pull carb. float bowl and clean bad fuel and resadew, unscrew brass looking jet and make sure clear,{should be able to blow air thru} ensure battery has full charge and should fire.
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