1999 Polaris SLH, SLTH, SLX, SLTX, PRO785 Factory Service Manual, Page 330Get this manual
ELECTRICAL Ignition Timing AdjustmentPolaris Dynamic (Running) Ignition TimingPolaris Engines
NOTE: Always verify timing of engine at room temperature only (6820 C)Verify the ignition position at maximum advance (3000 RPM) when checking the timing
If engine damage has occurred due to suspected ignition related problem, check the ignition timing at the specified operating RPMAlways dial indicate the timing mark before attempting to adjust the ignition timingTo indicate the marks: 1Remove timing inspection plug from starter cover23Remove front (Mag) cylinder spark plug and install dial indicatorRotate crankshaft by hand while observing dial indicatorAs the piston touches the indicator plunger, the dial will begin to rotateFind the exact point where the pointer stops rotating and reverses directionThis will be Top Oead Center (TOC)While holding crankshaft with piston at TOC, zero indicator by rotating bezel until "0" on dial and pOinter alignRotate crankshaft opposite the direction of rotation about .200" BTOC (2 pointer revolutions)Rotate the crankshaft in the normal direction of rotation to .081" (2.06mm) BTOC56