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  1. #1

    Wanted - 300X fuel injector cleaning procedure

    Wanted - 300X fuel injector cleaning procedure

    Anyone know a link for this?

    Thank you


  2. #2
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    Take them out... send them to be cleaned and flowed. Usually less the. 100$

  3. #3
    "just sayin".. jetdave56's Avatar
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    http://injector-rehab.com/shop/

    Ive used them on my Yamaha GPR 2 stroke because I was running pre mix...
    They will bench flow test your injectors ,checking spray pattern and volume and send you a graph to show whether your within specs,I believe it's like $20 an injector...
    But why do you think you need a cleaning on your Ultra?

  4. #4
    Fat Man, Little Boat Region8Ultra250X's Avatar
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    Quote Originally Posted by jetdave56 View Post
    http://injector-rehab.com/shop/

    Ive used them on my Yamaha GPR 2 stroke because I was running pre mix...
    They will bench flow test your injectors ,checking spray pattern and volume and send you a graph to show whether your within specs,I believe it's like $20 an injector...
    But why do you think you need a cleaning on your Ultra?
    rc engineering as well offers the same service.... but i'm with you whats the mitigating factor for needing injectors cleaned?

  5. #5
    so my 300x shutting down after a minute in the water problem was do the a failed exhaust filter and busted rubber exhaust hose off the WB

    I replaced it all, took it for a run tonight, now it will run while in the water... the issue of it shutting down after a min is gone... new problem is , taking off slow works finer,,, give it full throttle and it takes off for a second and then dies for a second and then takes off again and then dies repeat... (it does not shut off),, but the engine feels like it cuts out until you release the throttle at which point it just idles fine

    if I accelerate slowely, I can do so until about 5000rpm of which it has repeated hesitation

    seems like a fuel issue .... or almost like the spark plugs momentarily fail....

  6. #6
    Fat Man, Little Boat Region8Ultra250X's Avatar
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    Quote Originally Posted by theherb View Post
    so my 300x shutting down after a minute in the water problem was do the a failed exhaust filter and busted rubber exhaust hose off the WB

    I replaced it all, took it for a run tonight, now it will run while in the water... the issue of it shutting down after a min is gone... new problem is , taking off slow works finer,,, give it full throttle and it takes off for a second and then dies for a second and then takes off again and then dies repeat... (it does not shut off),, but the engine feels like it cuts out until you release the throttle at which point it just idles fine

    if I accelerate slowely, I can do so until about 5000rpm of which it has repeated hesitation

    seems like a fuel issue .... or almost like the spark plugs momentarily fail....
    when is the last time you checked your belt tension and or all of the boost couplers i.e. all the connections from the supercharger outlet to the throttle body?

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  8. #7
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    You get all the old filter out of the box? Could be clogging it up if not

  9. #8
    "just sayin".. jetdave56's Avatar
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    How many hoses did you remove and assemble,you must have removed the IC to get back there for that burnt out exhaust hose from WB...
    Im guessing Boost leak ,you simply didn't tighten every hose clamp tight..

    Tell ya this,if you used only a Phillips or screwdriver to tighten down clamps on all those hoses,you didn't tighten enough...

    Ask me how I know


  10. #9

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    I used a 60cc NG style Syringe I modified to have the injector fuel rail end fit into. Then I applied 9vdc to the contacts allowing the solenoid to open inside, then push injector cleaner through. I noticed the mist pattern get stronger each time I did it, and fixed the issue I was having on my 12F. It was cheap and it worked great. There are some good youtube vids as well on cleaning injectors..

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