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    poor gas mileage for a 2006 ski-doo 600 H.O.

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    • Member since
      August 2005
    poor gas mileage for a 2006 ski-doo 600 H.O.
    Posted by Mikuni Madman on Friday, November 6, 2015 7:19 PM

    I bought a used 2006 doo Renegade 600 H.O. last year....about 4,000 miles, but in emaculate condition.  It has only one problem.......horrible gas mileage....consistant 10-12 mpg groomed trail riding.  I have ridden with several of these 2006 600 H.O. engines in the past, and are very capable of 16-20 mpg.  Where do I start looking ?  Is this a sensor problem, a fuel system problem, or a ECU problem ?   I have talked to several doo mechanics, and no one has an answer....HELP !!!

    • Member since
      July 2005
    Posted by dyna-tek racing on Friday, November 13, 2015 9:01 PM

    If it is a carbed version there are several things that can be done,a lot of my customers have dropped one main jet size and took the plastic packing washer that is under the jet needle and put it on top of the clip that holds the needle,this improved performance and netted better fuel economy.You have to be careful to pay attention to the amount of ethanol in the fuel your using ,when doing any carb recalibration always check piston wash and plug color And adjust jetting as needed. Next is changing your drive ratio most owners of that sled will drop a tooth size or two on the jack shaft,that will result in a transmission that works easier to maintain mid range trail speeds and may actually be able to sustain your current top speed,both of these simple modifications should get your machine running better and more efficiently.Always pay attention to belt condition and idler wheel bearing condition and track tension.hope this helps you out,if you need any more set up advise feel free to call me at dyna-tek performance ,thanks Todd Guthrie.

    master mechanic-outboard,sterndrive,pwc,snowmobile. dynamometer facility -crank repair -cylinder repair-trail and race motors-shock service clutch machining and balancing. complete racer support- free technical support-racer discount programs Todd Guthrie 1-260-316-2839 or like us on face book and keep up to date on monthly specials using our facebook page.See new innovative product as soon as it gets built

    • Member since
      August 2005
    Posted by Mikuni Madman on Tuesday, November 17, 2015 4:01 PM

    Thanks Todd.....reply greatly appreciated.  It is not carbed....it's injected.  I'[ve had the drive clutch apart, and things were within tolerance.  Could try a new drive spring, or driven spring.....but it seems to perform fine on the trail as compared to normal.  Belt is new, and has correct deflection.  I have ridden with several of these in "stock from Ski-doo" parts, and this sled gets almost half the mileage the others were getting.  My wife has a 2008 GSX with 600 injected engine, and gets 19-20 mpg trail riding.  What I have just said is why I'm puzzled as to where to start looking.  Would it be smart to start by replacing both drive/driven springs and maybe rollers ?  As far as dropping a tooth on the driver....could it make mileage worse ?   Your reply wopuld lead me to believe you really doubt it's sensors or any other electonics.

    • Member since
      July 2005
    Posted by dyna-tek racing on Wednesday, November 18, 2015 1:13 PM

    if you had a bad sensor you would have an engine light on in the guage.If you havent checked compression or leak down values go there next, ask your buddies when there cruising a certain speed what RPM there sled is holding at and seeif yours is similar,that may lead you to a transmission problem or rule it out.The one thing to check out is the throttle body boots/reeds they are one peice and known to fail on a regular basis, you will need to pull one out to see if they are effected, sometimes you can tell on the outside they will be bumpy under the rubber around the perimiter of the boot where it bolts to the cylinder, if you see any bumps or roughness plan on replacing them asap,i dont think alot of the 600HO sdi motors got more than 16 mpg on the norm so dont get all hung up about not getting 20 mpg, lets just see if we can get you something better

    master mechanic-outboard,sterndrive,pwc,snowmobile. dynamometer facility -crank repair -cylinder repair-trail and race motors-shock service clutch machining and balancing. complete racer support- free technical support-racer discount programs Todd Guthrie 1-260-316-2839 or like us on face book and keep up to date on monthly specials using our facebook page.See new innovative product as soon as it gets built

    • Member since
      July 2013
    Posted by IMP 800 on Thursday, November 19, 2015 3:39 PM

    Don't forget yours is a long track so right there will get worse fuel mileage

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