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    98 Formula DLX 583

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    • Member since
      January 2017
    98 Formula DLX 583
    Posted by sdorn2006 on Tuesday, January 17, 2017 12:31 PM
    Hello, I am looking for some advice. I have a 98 Ski doo Formula DLX 583.
    I went for a ride last winter. Went about 5 miles and was going 60 and sled started to bog as if it had a fouled so I replaced the plugs. Ran like it was starving for fuel for ½ mile couldn’t get over 20 running at 5000 rpm. Then all of a sudden it broke loose and allowed me to go 60 again for few miles and then started acting funny again.
    So I had carbs cleaned. Compression is 125 on each cylinder. Went out with sled had same problems.


    Everyone has said fuel issue. So this year I decided to replace the carbs. Put an inline fuel filter. Took it out last weekend ran awesome for 5 miles and then started acting up again. I checked for air leaks didn’t find any. Spark plugs were darker brown. A little on the wet side. Took it out again yesterday. Ran awesome for first few miles. Defitnetly runs the best cold. Then when it gets warmer only can go 2 -3 miles before acting funny. 
    Any advice?
    • Member since
      July 2005
    Posted by dyna-tek racing on Wednesday, January 18, 2017 11:01 PM

    if you beleive it to be a fuel related issue, then start at the source(fuel pick up in tank)check the in tank supply line and filter, see if it is still atached to the through fitting on the tank and that the filter on the end is clean,next on to the fuel shut of valve, make sure it flows correctly,then on to the fuel pump check diaphrams and pulse line to verify it has good vacume to actuate the pump diaphrams. then to the carbs, cleaned and jetted correctly(on rotary valve motors there is a left and right carb,dont get them backwards or the jetting will be wrong).next is verifying that the motor is good ,compression and leak down and making sure the rotary valve is operating correctly and in time, verify that both rave valves operate correctly and that the exhaust has no unusual restrictions, that should be about all there is to it, good luck

    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
      January 2017
    Posted by fordskidooZr2 on Wednesday, February 8, 2017 9:45 AM

    I had a simmilar issue with my 93 Safari, I bought the fuel pump rebuild kit and it didnt work so i bought the new fuel pump and ran a new vaccum line from the engine to the fuel pump. If that model has the vacuum line to fuel pump check and make sure theres no cracks or leaks in that. 

    1991 Polaris 340 Indy Lite

    1993 Ski Doo Safari

    1985 Ski Doo Safari


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