1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 32Get this manual
Specifications65
General
Full Throttle Operating Range Idle rpm in Forward Gear Test Wheel and rpm
45005500 750 rpm Part No386665 (11316" dia 12732" wide) 5000 rpm
Powerhead
Bore and Stroke Piston Displacement Width of Ring Upper Lower Cran kshaft Size Top Journal Center Journal Bottom JournalConnecting Rod Crankpin +Standard Bore Size +To determine correct bore size for oversize pistons, merely add oversize dimension to standard bore size 76,20 mm 59,53 mm (3.000" Bore 2.3437" Stroke) 814 cm (49.7 cuin 2,286 2,273 mm (0 .0900".0895) ,588,562 mm (0 .0625" -0.0615") 38,04738 ,034 mm (1.4979"1.4974") 34,930 34,920 mm (1 .3752"1.3748") 30,11029,997 mm (1.18151.1810") 30,04330,030 mm (1 .1828"1.1823"76,21376,187 mm (2.9995.0005)
Ignition System
Ignition Spark Plug Champion Spark Plug Gap Ignition Coil RPM Limiter Powerpack Flywheel magnetobreakerless C.D L77J4 or QL77J4 1,0 mm (0 .040") Part No 582366 or 582106 Part No 582556 (5700 rpm)