Johnson J10RLSRD Service Manual page 127

IGNITION
IGNITION SYSTEM TESTS
STEP 2
Calibrate ohmmeter on appropriate scale. Con-
nect meter red lead to coil primary terminal. Con-
nect meter black lead to coil spark plug terminal.
• Meter must show 275
±
50 ohms
DR4094
STEP 3
Test spark plug leads for continuity. Calibrate
ohmmeter on low ohms scale. Attach one ohmme-
ter lead to each spring terminal. While wiggling
both spark plug covers and entire length of the
spark plug lead, the resistance should remain
near zero. Replace spark plug lead if your test
results vary.
126
Ignition Coil Analyzer Tests
IMPORTANT: When conducting these tests to
the coil, do not exceed its maximum specified
amperage.
Magneto C.D. Coil Specifications
Operating Merc-O- Tronic Stevens
Amps (Max) 1.5 amps
1.1 amps
Analyzer
Normal
Polarity
Power Test
The ignition coil is tested with normal polarity con-
nections.
Connect tester red lead to the primary terminal of
the coil and the tester black lead to the ground
tab. Connect the high tension lead of the tester to
the coil spark plug lead.
1
2
3
1. Primary terminal
C0A4328
2. Ground tab
3. Coil spark plug lead
A steady spark, in the tester at or before maxi-
mum specified amperage, indicates a good coil.
Refer to Ignition Coil Specifications on p. 125.