Mercury 100 FourStroke, Service Manual

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90-830234R3 DECEMBER 1997 ELECTRICAL - 2C-9
Idle Adjustment
1. With engine in water, connect electrical harness
and fuel line to engine. Start engine and allow to
warm up.
2. Properly adjust carburetor low speed mixture
screws. Refer to “Carburetor Adjustments” sec-
tion 3A.
3. Holding throttle arm at idle position (throttle cable
barrel removed from barrel retainer), adjust idle
timing screw to attain an engine idle RPM of
650-700 RPM in “Forward” gear. Tighten locknut
and turn off engine.
53432
a
b
a - Idle Timing Screw
b - Locknut
Throttle Cable Installation
1. With end of throttle cable connected to throttle le-
ver, hold throttle lever against idle stop. Adjust
throttle cable barrel to slip into barrel retainer on
cable anchor bracket with a very light preload of
throttle lever against idle stop. Lock barrel in
place.
IMPORTANT: Excessive preload on throttle cable
will cause difficulty when shifting from forward
to neutral. (Readjust throttle cable barrel, if nec-
essary.)
2. Check preload on throttle cable by placing a thin
piece of paper between idle stop screw and idle
stop. Preload is correct when paper can be re-
moved without tearing, but has some drag on it.
Readjust throttle cable barrel, if necessary.)
3. Reinstall sound box cover.