2007-2008 Polaris IQ Snowmobiles Service Manual, Page 127Get this manual
Engine and Cooling Systems check for rough spots3With section of wire (wire coat hanger), anchor it to convenient spotBend one end at the outer perimeter of the degree wheel as shown below4Install dial indicator into the magneto end cylinder spark plug holeThe ignition timing is referenced by the magneto end5Locate TDC as accurately as possible by finding the center of the point where there is no piston movement note the "Zero" the dial indicator at this point6Continue to rotate the crankshaft in the normal direction of rotation until the dial indicator reads .100" (2.54mm) after top dead center (ATDC)7Bend the pointer or move the degree wheel until the pointer aligns with 180 mark on the degree wheel8With the pointer aligned, make sure the degree wheel and pointer are secured and will not move out of positionRecheck accuracy of this location few timesThe pointer should align with the 180 mark when the dial indicator reads .100" (2.54mm) ATDCNOTE: Do not move the crankshaft, degree wheel or pointer after the initial setting on the MAG end cylindersimply read the wheel and dial indicator9Remove the dial indicator and install in PTO cylinderRepeat finding TDC processNote the degree wheel indication when the dial indicator reads .100" ATDCIt should be 180 (+-2) from the MAG cylinder mark