Chrysler 20 and 30 HP Outboard Motors Service Manual OB 3435, Page 21Get this manual
ENGINE SPECIFICATIONS 20 H.PB.I.AH.PI.S.0Power Recommended Operating Range Idle RPM in Gear Test Wheel Engine Type Bore and Stroke Displacement Compression Spark Plug Spark Plug Gap Point Gap
20 4750 RPM 14.2 KW 4750 RPM
30 H.PB.I.AH.PI.S.0Power Recommended Operating Range Idle RPM in Gear Test Wheel Engine Type Bore and Stroke Displacement Compression Spark Plug Spark Plug Gap Point Gap
30 4750 RPM 21.2 KW 4750 RPM
4250-5250 RPM
4250-5250 RPM
750 Max 8969A cycle, cylinder 2-13 16 2.3 (7 .14 5.84 cm) 28 .57 cu in (468 cc) 95-105 PSI (677.4 kgcm 2) L4J
750 Max 2954A cycle, cylinder 2.414 (7 .62 6.13 cm) 34 .1 cu in (559 cc) 125-135 PSI (8 .809.50 kgm2) L4J