Mariner 30 JET 40 (4 CYL) Service Manual page 73

MAXIMUM TIMING ADJUSTMENT
1. Advance throttle/spark arm until MAXIMUM
SPARK ADVANCE SCREW is against stop. En-
gage electric starter. If necessary, adjust maxi-
mum spark advance screw to align 32 BTDC
mark on flywheel with "V" notch in timing pointer
window. Tighten locknut.
a - Maximum Spark Advance Screw
b - Stop
c - Locknut
IMPORTANT: The advance characteristics of this
ignition system are such that the ignition timing
will retard itself slightly at wide-open-throttle.
Thus, setting maximum timing at 32 BTDC at
cranking speed should result in retardation to
30 BTDC at 5500 RPM. Therefore, it is recom-
mended that to be assured of maximum perfor-
mance from this outboard, all timing adjust-
ments made at cranking speed should be verified
with the outboard running.
2. Remove timing light and SPARK GAP TESTER
from #1 (TOP) spark plug lead.
3. Reinstall spark plugs. Torque spark plugs to 20
lb. ft. (27.1 N·m).
4. Reconnect spark plug high tension leads to spark
plugs.
90-814676R1 DECEMBER 1996
a
c
b
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THROTTLE SECONDARY PICK UP
ADJUSTMENT (OUTBOARD NOT RUNNING)
1. With engine not running, advance outboard
throttle lever to hold maximum spark advance
screw against stop. Adjust secondary throttle
pick up screw so that end of screw just touches
secondary lever of carburetor cluster. Tighten
lock nut.
b
a
a - Secondary Throttle Pick Up Screw
b - Lock Nut
b
a - Secondary Throttle Pick Up Screw
b - Carburetor Cluster, Secondary Cluster
ELECTRICAL AND IGNITION - 2C-3
54663
a
54664