1977 Evinrude 4HP Outboards Service Manual, PN 5303, Page 7Get this manual
SPECIFICATIONS Model 4706(Weedless gearcase) 4736(Standard gearcase) Propeller Speed control Weight Fuel tank capacity Starter Ignition Spark plug Spark plug gap Spark plug torque Ignition Coil Weedless6-14" dia 6" pitch, blades plastic Single leversynchronized throttle and spark Weedless36.0 lbs(16.3kg) Standard38.0 lbs(17.2kg) (11.4 liters) gallons Automatic rewindnylon rope Flywheel magnetobreakerless C.DAC-M40FFX Champion L77J4,14 mm .040 inch (1.0mm) 17 -120-12 foot-pounds (2427 Nm) #1 CylinderPart No581686 #2 CylinderPart No581685
4 hp at 4500 rpm Horsepower (BLA- certified) Full throttle operating range Test tank rpm with test wheel 4000 to 5000 rpm 4100 rpm Part No316021 for Weedless 4550 rpm Part No317738 for Standard Engine type Bore and stroke Piston displacement 2-cylinder, cycle alternate firing 1-9 16" (39.69 mm)bore 1-38" (34.93 mm) stroke 5.28 (86 cmcubic inches
Piston ring sets (2 per set) standard Part Number 383920 .030" Part Number 384312 oversize Diameter of ring Width of ring Piston assembly standard .030" oversize Crankshaft size top journal center journal bottom journal Connecting rod crank pin Carburetion 1.563 in(39.70 mm) standard .0625-.0615 in(1.5881.562 mm) Part Number 384651 Part Number 384666 0.7520.7515 in(19.101-19.088mm) 0.6854.6849 in(17.409-17.396mm) 0.6854.6849 in(17.41-17.396mm) 0.6255.6250 in(15.88815.875mm) Single barrel float feed, with high and low-speed adjustments manual choke Flush with casting .053.050 (1.351.27mm) Use #55 drill as gageCombination positive displacement and centifugal pump1728 Weedless 12:25 Standard Part Number 316558 18" 1234" stainless steel Standard7-1 2" dia 6" pitch, blade plastic