1972 Johnson 2HP Outboard Motor Service Manual, Page 9Get this manual
SPECIFICATIONS
Model Numbers (B.I.Acertified) at 4500 rpm Full throttle operating range 4200 to 4800 Test tank with test wheel 4000 Test wheel Part Number 316021 Engine type Single cylinder, cycle Bore and stroke 1-916" bore 1-38" stroke Piston displacement2.64 inches Piston ring sets (2 per set) standard Part Number 383920 .030" oversize Part Number 384312 Diameter of ring 1.563 in(standa.rd) Width of ring .0625.0615 inLbscompression recommended when compressed1.3 to 2.8 lbsPiston and ringsstandard Part Number 384651 .030" oversize piston less rings Part Number 384666 Crankshaft size journal .7502.7497 inBottom journal .7502.7497 inConnecting rod crank pin .6690.6685 inCarburetion Single barrel float feed, with high and low- speed adjustments Float level setting Flush with casting Inlet needle seat .050.053 Use #55 drill as gage Cooling system Vari-volume Propeller gear ratio 12:25 Propeller drive pin Part Nl,lmber 203230 Propeller 7-1 4-12 Speed controlSingle lever, synchronized throttle and spark Weight 24 lbsFuel capacity Gravity feed integral tank qtstarter Manual self rewinding Ignition Flywheel magneto Spark plug Champion J6J14mm Spark plug gap .030 inch Spark plug torque -17-1220-1 foot-pounds Breaker point gap .020 inch Condenser Part Number 580321 Capacity .18 to .22 MfdPart No580416 Test Specifications Old stevens Tester Index Reading Switch 2to 2.5 New stevens Tester Model NoSwitch 22 Merc-O- Tronic Operating Amperage 1.4 Maximum Secondary 5500