Chrysler 70, 75 and 85 HP Outboard Motors Service Manual OB 3438, Page 21Get this manual
ENGINE SPECIFICATIONS 70 H.PB.I.AH.PI.S.0Power Recommended Operating Range Idle RPM in Gear Test Wheel Engine Type Firing Order
70 4750 RPM 49.5 KW 4750 RPM
Bore and Stroke Displacement Compression
3.3125 2.80 (84.1 71.1 mm) 72 .39 cuin(1186 cc) 145-165 PSI (10 .2-11 .6kgcm2) L20V
4400-5100 RPM
Spark Plug Spark Plug Gap Point Gap Timing Wide Open Throttle
750 RPM TA 8991 (4700 RPM wl plugs) cyclecylinder 1, 2, 3
Not Adjustable Breakerless
75 H.PB.I.AH.PI.S.0Power Recommended Operating Range Idle RPM in Gear Test Wheel Engine Type Firing Order
75 4750 RPM 53 KW 4750 RPM
Bore and Stroke Displacement Compression
3.3125 2.80 (84 .1 71 .1 mm) 72 .39 cu in(1186 cc) 145-165 PSI (10 .2-11 .6kgcm 2) L20V