1979 Evinrude 4 HP Outboards Service Manual, PN 5424, Page 10Get this manual
SPECIFICATIONS Models 4904 Weedless gearcase, standard length 4932 standard gearcase, standard length 4933 standard gearcase, long shaft h'p (2.8 kW) at 4500 rpm 4000 to 5000 rpm 3800 rpm Part No316021 for Weedless 4550 rpm Part No317738 for Standard Idle rpm Engine type Bore and stroke Piston displacement 600 rpm 2-cylinder, stroke cycle al ternate fi ri ng 1-9 16" (39.69 mm) bore 1-38" (34.93 mm) stroke 5.28 cubic inches (87 cm )
MISCELLANEOUS
Speed control Weight Single lever, synchronized throttl and spark Weedless38.0 Ibs(17.2 kg) Standard38.0 Ibs(17.2 kg) Automatic rewindnylon rope
POWERHEAD
Horsepower (B.I.A- certified) Full throttl operating range Test tank rpm with test wheel Starter
IGNITION SYSTEM
Ignition Spark plug Spark plug gap Spark plug torque Flywheel magneto, breakerless C.DAC-M40FFX Champion L77 J4,14 mm .040 inch (1.0 mm) 17-1220-12 foot-pounds (2427 N.m) Part No581998