1988-1992 Mercury Force 5HP Outboards Service Manual, Page 119Get this manual
AASCHEMATIC (81M I)
FLYWHEEL
TEST PROCEDURES (81M I)
TEST POINT TESTER SETTING
TEST 1: IGNITION SPARK TEST
READING
sn Spark tester lead to spark plug lead #1
spark plug lead
38 inGap
If no spark, go to Test #2
(see Note 1)NOTE1: Lanyard must be in place on lanyard switch for all testsTEST 2: LANYARD SWITCH TEST
LS1 Remove BRN lead from switch terminalLS2 Remove other BRN lead from switch terminal
Repeat Test #1