1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 150Get this manual
CYLINDER HEAD
CYLINDER HEAD VALVES
ValveValve SeatValve Guides: Valve Clearance (cold) Intake Exhaust Valve Dimensions: "A" Head Diameter Intake Exhaust "B" Face Width Intake Exhaust "C" Seat Width Intake Exhaust "D" Margin Thickness Intake Exhaust Stem Outside Diameter Intake Exhaust Guide Inside Diameter Intake Exhaust Stem To Guide Clearance Intake Exhaust Stem Run-out Limit (max
0.0060.010 in(0.150.25 mm) 0.0080.012 in(0.200.30 mm) 1.0981.106 in(27.928.1 mm) 0.8620.870 in(21.922.1 mm) 0.0790.124 in(2.003.14 mm) 0.0790.124 in(2.003.14 mm) 0.0240.031 in(0.60.8 mm) 0.0240.031 in(0.60.8 mm) 0.0200.035 in(0.50.9 mm) 0.0200.035 in(0.50.9 mm) 0.21560.2161 in(5.4755.490 mm) 0.21500.2156 in(5.4605.475 mm) 0.21650.2170 in(5.5005.512 mm) 0.21650.2170 in(5.5005.512 mm) 0.00040.0015 in(0.0100.037 mm) 0.00100.0020 in(0.0250.052 mm) 0.0006 in(0.016 mm)