1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 9Get this manual
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SPECIFICATIONS
IGNITION SYSTEM
SPARK PLUG GAP (1995 AND NEWER) 68 9.91015 Firing Order Stator High Speed Winding Stator Low Speed Winding Diode Test Ignition Coil Resistance: Primar