1975 Johnson 4HP 4R75, 4W75 Outboards Service Manual, Page 8Get this manual
CLEARANCE CHART POWER HEAD Piston ring gap Piston ringgroove Cylinder and piston CrankshaftUpperCenterLower Connecting rodPiston endCrankshaft end LOWER UNIT Weedless Standard PinionBushing In Gear Case .003 Max- .001 Min.0022 Max- .0007 Min.0067 Max- .0022 Min.0022 Max- .0007 MinStandard .0018 Max- .0005 Min.015 Max- .005 Min.0040 Max- .0020 Min 0020 Max- .0008 MinNeedle Bearings .0023 Max- .0013 Min 0023 Max- .0013 Min.0011 Max- .0004 Min.0017 Max- .0007 Min
Weedless Drive ShaftBushing In Gear Case Gearcase HeadBushing Assembly Propeller On Shaft Gear Case Bushing To Propeller Shaft
.0015 Max- .0005 Min 0053 Max- .0020 Min
TORQUE CHART
POWER HEAD Flywheel nut Connecting rod screws Cylinder head screws Crankcase to cylinder screws upper, center, lower Spark plugs Pull at propeller shaft to tilt up lower unit 3040 Foot-pounds 6066 Inch-pounds 6080 Inch-pounds 6080 Inch-pounds 17-120-1 Foot-pounds 1215 lbs