Quantcast
Jump to content


Recommended Posts

Posted

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.

  • Like 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Similar Topics

    • By BMurph
      Hi everyone. I am new here to the forum and am excited to learn from all of you with more experience than me with UTVs. Our Axis750 we use on the hobby farm started to have some issues going into gear. Yes, foot is on the brake and completely stopped as required with these machines. I thought it was the linkage and adjusted it to where it is accurately shifting with the engine off and key in the on position. I start the engine and it won't shift gears (yes foot is on the brake). I thought maybe it was the shift lever teeth so I opened the assembly and this picture shows what I just found. I assume this means the wet clutch would need replaced too while draining and flushing the oil. What else should I consider or be looking at? Any idea what could cause this? I don't see visible leaks or cracks in the system anywhere. Thanks in advance for the help!
       
       

    • By TexAcoon
      I'm looking to purchase a 2015 Massimo 550 that might have an issue with it's throttle position sensor.   
      From the fella selling this UTV, he claims its to set the idle on fuel injection because the engine will not stay idle or when it starts sometimes it idles too high.
      My Question if anyone had any issues with their Massimo 550 and if it was actually the TPS or something else that would allow the machine to idle correctly.
      Thanks!
       
    • By rsar
      So I finally got my Quad Gear cab enclosure after waiting out the backorder for three months and to say it's been a huge disappointment is a pretty big understatement. I think mostly because I could make it work, if not for one major issue. The windshield is right next to impossible to see out of. It's a real headscratcher because the side and rear windows are okay. It's not high quality 30 or 40 gauge marine vinyl but I have Quad Gear's stand-alone winshield so I knew it wasn't the best in terms of visibility, but definitely doable for the price.  Incredibly, the side and rear windows of the cab eclosure are just as clear as the stand-alone windshield. And the windshield on the enclosure is like 50 percent worse than the stand-alone. It's the same company! I don't get it. If it had just been the rear windshield that was that bad I would have kept it. There are some creases and wrinkles here and there, but I've been using the stand-alone  windshield for the past three months so it's good enough not to have to shell out $600 plus for the stock hard windshield. I'd put visibility at about 65- 70 percent. The wife hates it though, which is a pretty big negative. In any case, my original plans were to have an upholsterer change the crappy vinyl out for the high quality stuff and I even sent it to a guy who ended up flaking out on me and refusing to do it. He said he didn't want to charge me $400 for something I paid $200 for.  Long story, short, I decided to return it and just get the insanely expensive Kawasaki enclosure next winter since the frigid temps here are about to start climbing in a couple weeks anyway. I first put it on just to see how it would look (I took pics of course) and found that it didnt even seal 100 percent and made it drafty inside the cab. So make that two major issues. At least with the stock enclosure everything will be top flight. Doors will be nice too.




    • By vachi
      hi everyone i have this 2021 Hisun forge 250 that won't start. no spark no fuel.   when i turn the key on i dont hear the relays click or fuel pump come on. it does have power but the relay doesnt ground the pump or the ignition coil. dont know if there are any safety switches on this model or not.  it does crank and all the accessories work. i  hot wired the pump and it does work.  i found a wiring diagram but it's very hard to figure out and was hoping someone has seen this before. all fuses are good. thanks in advance. 
    • Get More For Your Device
    • By boydog40
      my subaru gave it up, bought a new Predator 670cc
      problems is, wiring the buggy to the new motor, OEM key switch has 5 wires (red, green, yellow, black and brown)
      new motor has many more wires than the Subaru and i have no idea what goes where!!!
      finding any info on the web is almost impossible to do also
      any help will be greatly appreciated!
      thanks guys
×
×
  • Create New...