1990-1998 Arctic Cat Snowmobiles Repair Manual, Page 83Get this manual
LUBRICATION, MAINTENANCE AND TUNE-UP
break in the engine just as if it were newThe performance and service life of the engine depends greatly on careful and sensible break-inFor the first 10-15 hours of operation, apply no more than 34 throttle and vary the speed as much as possibleAvoid prolonged steady running at one speed, no matter how moderateAvoid hard accelerationAlso avoid wet snow conditions during break-inTo ensure adequate protection to the engine during break-in, pre-mix the first tank of fuel at 50: ratio with the same oil used in the injection systemArctic Extreme 50: Injection Oil or equivalent is recommendedThis oil will be used together with the oil supplied by the injection systemThroughout the break-in period, check the oil injection reservoir tank to make sure the injection system is workingThe oil level will diminishNOTE Do not continue to use 50: pre-mix after the first tank unless the snowmobile is operating in weather conditions where the ambient temperature is -26 (-15 F) or colderUnder these conditions, the 50: pre-mix will help to ensure sufficient engine lubricationRefer to Correct Fuel Mixing in this chapter for additional information