1971 Johnson 40HP outboards Service Manual, Page 7Get this manual
SPECIFICATIONS Model Numbers 40R71Standard length (15" transom) 40RL71- 5" longer (20" transom) 40E71Standard length (15" transom) 40EL715" longer (20" transom) Propeller options blade, pitch blade, pitch blade, blade, 10-38" diax 11-12" 10-12" diax 12" 10-38" diax 14" pitch 11" diax 9" pitch
Horsepower (B.I.A40 hp at 4500 rpm certified) Full throttle 4000 to 5000 rpm operating range Tank test with test wheel Engine type Bore and stroke 4300 rpm Part Number 378566 cyl cycle, alternate firing 3-316" bore 2-34" stroke
Speed control
Knob on steeringbracketor remote controlSynchronized throttle and spark Forward, neutral, and reverse Model40R71128.5 lbsMode140RL71132 lbsModel 40E71140 lbsModel 40EL71144 lbs(Fuel tank weight 11 pounds net) gallons 40R71-40RL71Ready pull self-winding 40E71-40EL71Electric
Gear shift control Weight (without fuel tank)
43.9 cubic inches Piston displacement Piston ring sets (2 per set) standard Part Number 384699 .030" oversize Part Number 384718 Diameter of ring Width of ring Lbscompression recommended when compressed Piston less rings standard .030" oversize Crankshaft size Top journal Center journal Bottom journal Connecting rod crank pin Carburetion 3.1875 in(standard Upper.0900.0895 inLower.0615.0625 inUpper.5 to 2.5 lbsLowerto lbs