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By Travis
Many people have issues with the kawasaki FJ400 engine fouling out spark plugs, after working on a few FJ engines and 600 series Mule's with this issue, i can say the fix for this issue is using a slightly hotter spark plug... the factory recommends a BPR6ES NGK plug.... the Number in NGK plugs represents its heat range and somewhat odd, the lower the number the hotter the plug, at least as far as NGK is concerned. If you have a Mule fouling spark plugs try installing a NGK BPR4ES spark plug.
FROM NGK
A hotter heat range spark plug has an insulator design with a longer heat flow path to the metal shell of the plug. As a result, more heat stays in the ceramic firing end and less is dissipated to the engine. A colder heat range spark plug has an insulator design with a shorter heat flow path to the metal shell of the plug. As a result, less heat stays in the ceramic firing end and more is dissipated to the engine. For a spark plug to function properly, it must have a tip temperature high enough to burn off carbon deposits (self-cleaning) and avoid fouling, while remaining low enough to avoid overheating the ceramic firing end and pre-ignition.
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By Carol Vayhinger
4x4 street legal in some states! 812CC engine,1400 miles, locking differentials, 300# winch, roll bars, trailer hitch, soft top and upper doors, floor mats, custom deck with utility pack. So much fun!
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By joeam
I have a 2018 TW450E that runs in my yard and slow good just will not go down the road seems to be running out of fuel where should i start? I have replaced both fuel and air filter drained gas and tried a small auxiliary tank same issue i have ordered a new vacuum fuel pump to try next anyone in Texas that works on these?
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By Hugh
My 2018 Hisun sector crew engine cut off after about 15 minutes run. There is no indicator of what is wrong, no error code just die and won't restart until it cool down. I notice that the fan is not running but the temp indicator is on low temp, no overheat indicator. I checked the radiator fluid, it is cool to touch.
Cooling fans are working, I can hear it running once awhile if I can get the engine warm up enough. Thank you for all the help.
Hugh
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By Richard shepard
I have a 2021 colman 400utv engine will start and idle, as soon as you hit throttle to move engine dies and will only start when you throttle it, let off throttle it dies, I replaced the injector and plug still the same, anyone have any other ideas
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