SOURCE: 2004 600 sdi ski-doo missing at 4500 rpm
have you checked the plugs? they could be fouled or a build up of carbon. have you checked or rebuilt the carb, if so did you change the fuel lines they could be cracked and sucking air.
Testimonial: "new plugs. sdi so no carbs and throttle body was cleaned"
Time to rebuild most likely cooked internals but its easy just take your time disassembling to remember the assembly and a friend at a machine shop helps or a hone or equivalent
SOURCE: how do I adjust the oil mixture on my 1997 ski doo 583 grand touring snowmobile
The Oil Injection runs off a Pump on the Bottom of the engine and if I remember correctly... There is a Cable that runs off the Throttle and you can adjust it there. I have always been a fan of adding Oil to the Fuel Directly. I have replaced way too many engines due to Oil Starvation so as an added precaution, I still pre-mix my Fuel/Oil but the Ratio is not a complete 40-50/1. More like a 100-125/1. Do I ever foul out a plug? I DO... have I ever Oil Starved an Engine... NEVER... 2 Spark Plugs last me an entire season but I replace them at the Beginning of the season.... I would STRONGLY RECOMMEND cleaning the Hose that comes from the tank....
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