1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 7Get this manual
General Specifications Model 3040
HORSEPOWER (KW) OUTBOARD WEIGHT CYLINDER BLOCK STROKE CYLINDER BORE
Model 30 Model 40 30 (22.4) 40 (29.8)
15 in(38 cm) 20 in(51 cm) 22-12 in(57 cm) Type Displacement Length Diameter (Standard) Diameter [Oversize 0.015 (.381 mm)] TaperOut of Round Maximum Bore Type Cylinder Finish Hone (I.D Top Main Bearing Journal Center Main Bearing Journal Bottom Ball Bearing Journal Connecting Rod Journal Runout Piston Pin End (I.D Crankpin End (I.D Piston Type O.Dat Skirt (Standard) O.Dat Skirt [Oversize 0.015 (.381 mm)] Ring End Gap Reed Stand Open (Maximum) Reed StopModel 30Model 40 Gear Ratio Gearcase Capacity Lubricant Type Forward GearNoof Teeth-Type Pinion GearNoof Teeth-Type Pinion Height Forward Gear Backlash Reverse Gear Backlash Water Pressure With ThermostatPoppetW.O.T- Idle All Models WO ThermostatPoppetW.O.T- Idle Poppet Valve Opening 1994-1997 Poppet Valve Opening 1998Newer