SHOP TALK / Ski-Doo

Ask The Engineers is back again!  This is the time when forum members have the opportunity to pick the engineering brains at each of the Big 4 manufacturers about their new 2008 iron. 

Simply send your questions to amsnow@amsnow.com and we'll serve as the go-between with the engineers.  If you would like to add your name and hometown too, feel free.  

We will publish the best questions and answers in upcoming issues of the magazine.

Please read the guidelines below carefully.

1.) No question will be answered that includes foul language, manufacturer bashing, or other material not tolerated on the forum in general.

2.) Questions about future models will not be answered.

3.) Please categorize your questions into one of the following categories: Engine, Chassis, Front Suspension, Rear Suspension, Ergonomics, Miscellaneous.

4.) Due to limited space and time - not every question will be answered in the magazine.

5.) AmSnow reserves the right to edit questions.

Thanks for all your support and let's see if you can stump those engineers!

Hi

I have a MXZX 2003 600HO RER Mpem Dpm etc.  My problem is When I start the moter it will run very rich it is 17.5 idle jets 380 high speed jets and moter is stock It remains very rich up to 6500 rpm when it turns very lean I am only getting 5mpg where I used to get 12 to 14 mpg When moter is fully warm aprox 10 miles on ocaision and not every time the hot light flashes on and off my manual temp guage will show maybe 110 or 120 degres F and if you shut it off at this time and try to restart for the next 15 minutes the engine fires and Quits before pullcord reaches one half way out and will continue for 15 minutes of trying to start.Do you have any Idea what could be wrong I have ruin four barrels and pistons so far and nobody can fix my problem   Thanking You In advance for your Reply  John Flahr  Phone # 250 747 1431 Thanks John

John, your machine may have more than 1 problem.  Sounds as though there may be a fuel delivery problem, or ignition timing causing your troubles.  The 1^st step would be to check the pulse pump and ignition time the engine.  Between the two of these you should be able to diagnose your issues.

Straightline Performance

Thanks

It seems that I had a corosion on my black box pins I have scraped the white owder buildup off the little pins and lubricated the orings in my DPM and it seem to be back to normal  thanks  John