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Why no spark at plug - Kymco 2011 Mongoose 90

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Aaron Mcqueary

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Cylinoid could be bad which is quick fix. If not check magneto possibly need a new one or sometimes if it has rust on it you can take some sand paper to it...

Posted on May 13, 2015


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How do I change the spark plugs in my kawasaki mule 3010 deisel?

A diesel engine doesn't have any spark plugs.

Many diesel engines use heater plugs to aid cold starting and if the engine won't start or misfires for a while after starting they might need replacing if they are fitted, they might need replacing. The heater plugs are generally operated automatically and it is possible that is faulty.

Heater plugs are more expensive than spark plugs and usually a lot more difficult to replace.

Sep 02, 2017 | ATVs

1 Answer

I have a polaris ranger 6x6 500cc the plug in it now is a ngk bkr5e 7938. a friend gave me 2 unused ngk b7e s plugs and said that they wood run fine. Are these 2 ngk b7e s ok or what?

The figure 7 represents the heat range of the plug. Usually it is unwise to deviate from specifications unless problems force choosing a different heat range. If the spark plug regularly fouls then a hotter spark plug could improve the problem - with NGK that would mean moving from 5 to 4.

Any move must be made with care to avoid the engine damage possible if the spark plug is too hot.

Hot and cold plugs, incidentally, indicate the amount of heat the spark plug dissipates from the centre to the body and doesn't affect the temperature of the engine. Broadly cool running engines need hot spark plugs and hot running engines need cold plugs so in each case the spark plug nose will achieve the self-cleaning temperature without becoming too heated.

Moving from a 5 heat range to a 7 (NGK) is moving to a colder plug so yes it will run fine, at least for a while, though you could find plug fouling might be a problem...

Jun 18, 2017 | 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:
Timed spark

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

Spark plug blown out there is no more threads in hole , plug falls into the head of the engine. How does this happen.

It most often happens because a spark plug has become loose and compression begins to escape past the threads. As hot compression forces it way along, the cylinder head becomes very hot and especially with alloy heads, the threads will burn away or melt. Cross threading a spark plug can cause the same outcome.
Often the spark plug hole can be fixed by drilling out or dressing up the hole (cylinder head may have to be removed) and then inserting a helicoil (many sizes). This is a repair object that has threads on the inside (for the spark plug) and an outside surface that when heated up will "weld" itself to the cylinder head. It is a solid repair.

Oct 09, 2016 | ATVs

1 Answer

Spark plug gap for a Polaris sportmans 500 a 2010 year


BKR6ES(STOCK#6364) regular, or IRIDIUM BKR6EIX(STOCK#6418).Gap setting is .028.
That plug is used on all 500 HO from 2000-2011 Sportsman Models.

Here is your manual. Spark Plug page 93. Page 123 says
Spark Plug / Gap NGK BKR6E / .035 in. (0.9 mm)

Different plug (E rather than ES) and gap. check the plug that came out.

Jul 10, 2016 | Polaris 2004 Sportsman 500 H.O

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

Won't start was running but won't start after changing spark plug

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.

Oct 24, 2015 | Polaris 2005 Phoenix 200

1 Answer

Where are spark plugs located and how to change them

Most quads Have the spark plug on top of the engine. In order to change a spark plug you need to remove the plug wire, Take a rachet with the size of the Plug, then remove the plug. Insert the new plug, Rinse, Repeat.

Jan 09, 2015 | Polaris 2013 Sportsman XP 850 HO

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

1 Answer


Your magneto might be messed up its behind the flywheel on the left side of the atv. There is a permanent magnet on the spinning flywheel to produce the spark for the plug.Or could be faulty wiring to or from the plug

Feb 03, 2013 | ATVs

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