Mercury Mariner 8/9.9HP 4-Stroke Factory Service Manual, Page 8Get this manual
Model 89.9 Idle RPM Trolling RPM Wide Open Throttle (WOT) RPM 8.09.9 (BODENSEE) 9.9 Pilot Screw (Turns Out) 8.09.9 (BODENSEE) 9.9 Main Jet Size 8.09.9 (BODENSEE) 9.9 Pilot Jet Enrichener Jet Float Height Ignition Timing (Full Retarded) 850 50 RPM (Full Advanced) 2500-3000 RPM Type Displacement Number of Cylinders Length Diameter (Std) TaperOut of Round Maximum Bore Type Bore Wear Limit Piston Type O.Dat Skirt (Standard) (Oversize) 0.010 (0.254mm) (Oversize) 0.020 (0.508mm) Compression Ratio Cylinder Compression (cold engine) Top Main Bearing Journal Bottom Main Bearing Journal Connecting Rod Journal 950 50 RPM (Out Of Gear) 850 50 50005500 45005500 Not Adjustable 31 #82 #86 #48 .024 (0.61 mm) 0.04 in(25.5 mm) B.T.D.C35 B.T.D.C4 Stroke Cycle Over Head Camshaft 14.16 cuin(232cc) 1.67 in(42.4mm) 2.323 in(59.0mm) 0.003 in(0.076mm) Steel 2.326 in(59.1mm) Aluminum 2.32092.3216 in(58.95058.965 mm) 2.333 in(59.25 mm) 2.343 in(59.50 mm)