1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 103Get this manual

1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 103

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ADJUSTING MAXIMUM SPARK ADVANCE IMPORTANT: Setting the idle timing is required before adjusting the maximum spark advance16 Turn engine off17 Position twist grip or remote control lever to maximum thr