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Spark it has no spark what could it be

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  • 13 Answers

Bad plug, ignition wire, pick up,coil, crank sensor

Posted on Mar 24, 2014

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Hard to start Atv ?


Dont always trust a spark plug that gives spark,(it might be a weak spark). Happen to me!! checked everything but didnt want to start, there was fuel,spark and everything seems fine but NO LUCK. Next day fitted new plug and it starts at once.

on Aug 22, 2013 | ATVs

1 Answer

I have a 2016 Polaris sportsman 570 she's got a fuel pump tries starting her she will keep winding over but won't start any help would be nice


Make sure the kill switch is in the run position.

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!!

Check these and repost with the results...

Dec 17, 2016 | Polaris ATV

1 Answer

I have trouble with my all wheel drive it's an 02 sportsman 700 twin what should I start looking for


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..

Apr 05, 2016 | ATVs

1 Answer

NO SPARK AT SPARK PLUG. WHAT ARE THE PROABLE CAUSES,BATTERY IS BRAND NEW AND FULLY CHARGED. ENGINE TURNS OVER BUT STILL NO SPARK.


I would check the kill switch or on/off switch as those work by grounding out the ignition system so there is no spark. After that the coil or magneto might be the issue.

Feb 08, 2016 | Polaris 2010 Sportsman 400 H.O

1 Answer

Spark an I have no spark


Need to know what engine you have. You could have simple magneto ignition of CDI or ???

Nov 08, 2014 | ATVs

1 Answer

99 bear tracker


ok did you check for a good engine ground

Jun 09, 2014 | ATVs

1 Answer

50cc apache quad spark problems


Could be the CDI. Check the stator and pickup coil specs with a multimeter first.

Nov 17, 2013 | ATVs

2 Answers

Four wheeler has no spark at all


you might have to take off the flywheel and check the "spark maker" or follow the wires from the spark plug to engine might be a short

Mar 12, 2013 | ATVs

2 Answers

300ex weak spark


CHECK THE BOOT THAT GOES OVER THE SPARK PLUG IT MIGHT NOT BE TOUCHING THE WIRE.. ALWAYS TRY A NEW SPARK PLUG

Sep 13, 2012 | Polaris ATV

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