1978 Johnson 175, 200, 235 HP Outboard Service Manual, Page 12Get this manual
SPECIFICATIONS CONTINUED Sensor air gap Fixed Ignition coils Part No581823
Horsepower established at sea evelAllow reduction per 1000' (300 m) above sea levelPropeller furnished with motor may be exchanged for anyone of the options of equal value if new and unusedtOptional SST and SSTR Stainless Steel propellers available at extra cost
IGNITION COIL TEST SPECIFICATIONS
Stevens Model ST-75 Reverse Polarity (Switch Setting CD) 1.6 Stevens Tester Model M.A75 or M.A80 Switch {Use Model CD-l AdapterRed test clip to orangeblackBlack test clip to orange Coil 581764 Index Adjustment 20 Merc-O-Tronic with Capacitor Discharge Adapter Model 55-980 Operating Amperage Min- Max" 17 Primary Resistance 0.1 Ohm or less Secondary Continuity (approx Graham Tester Model 51 Maximum Secondary1,000 ohms Maximum Primary 0.6 ohm Maximum Primary DC Ohms (point test) 1.0 ohms Coil Index 60 Coil Test Minimum AMPLIFIED 29 (With secondary circuit "open") Hi tension lead disconnected Gap Index 60 (Coil must fire spark gap on tester at this setting) Primary Low Ohms 0.1