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Spark time is fixed and controlled by the crank trigger. There is only two things that can change spark timing. a twisted crank ( very rare ) a sheared flywheel key (Also very rare)
Valve timing, remove the timing inspection plug and the the pull start housing, you will use the nut on the crankshaft under the pull start to turn the crank to bring the timing mark TDC-COMPRESSION STROKE - into the timing inspection hole. remove the spark plug so your not fighting engine compression to turn the motor.
Now remove the the valve cover and check the alignment line on the cam. the alignment line should be level with the top of the edges of the cylinder. if not you have a problem
Sorry. the solenoid has nothing to do with a spark... the solenoid is a "power upper relay switch" for the starter ONLY!
I need more info.. have you taken out the spark plug and placed it against the head (metal to metal contact) and tried to get a spark?
Will the engine turn over with the starter? Does the solenoid click and not turn the engine over?
AN engine need three things to run: Compression
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..
try putting the old plug back in and see if it starts. If it does, check the gap on the new plug, if it is too tight or too wide it won't work. Check for a spark by holding the spark plug (connected of course) to the cylinder head and turn the engine over. Do you see a fat blue spark. If not, the plug is faulty.
A few questions so I can understand your situation better before qualifying an answer...Before this backfired, did you recently/previous run through high water?
Also, when you say "no spark", are you saying you actually pulled the plugs and field checked for spark or are you just saying no ignition/run on turning the starter? Lastly, Is this model electronic fuel injected..EFI?
Not starting issues are usually spark or fuel problems. If you have gas getting to the carb then check your spark. First check all the wire connectors and plug wire to make sure everything is connected. If you find a loose connection fix it then try it. If not, then remove the spark plug but leave it attached to the plug wire set it on the cylinder head and turn the engine over. You should see a bright spark. If you have a really weak spark or none at all, then it may be your ignition coil or a related ignition part.
The spark plug is on the left side (shifter) of the head,,..?/ this is August.. if the atv has been sitting the carb may need a qualified professional to clean it again.. Replace the spark plug before you squirt anything in the engine...