North Star 114654 Owner's Manual page 18

Spark Plug Maintenance
To ensure proper operation of the engine, the spark plugs
must be provided with proper clearance and are free of
deposits.
1) Remove the spark plug wire.
2) Clean the dirt around the spark plug holder.
3) Remove the spark plug with a spark plug socket
wrench.
4) Visually inspect the spark plug. If its insulator is
damaged, replace it with a new one. If the spark plug
can still be used, clean it with a wire brush.
5) Measure the spark plug gap.
0.028-0.031in
Spark plug socket wrench
6) To prevent misalignment of the threads, screw the
spark plug into the screw hole by hand.
7) After the spark plug is screwed to the end, tighten it
with a special socket.
a) To install a new spark plug, the user
should replace it according to the original
spark plug type. Thread the spark plug
into the engine until hand tight, then an
additionally 1/2 turn (after hand tight).
b) If a used spark plug is reinstalled, thread
the spark plug into the engine until hand
tight, then an additionally 1/8-1/4 turn
(after hand tight).
The spark plug must be tightened properly, or it may be
extremely hot and damage the engine.
Maintenance
Spark plug wire
CAUTION
High Altitude Operation
CAUTION: Operating at an altitude of greater than 3000
feet (914 meters) may affect your engines performance,
fuel consumption, and emissions. To remain emissions
compliant and improve engine performance at higher
altitudes, a high-altitude kit is required. A high altitude kit
includes a carburetor jet resized to help correct air / fuel
mixture at altitude. To order a high altitude kit or if you
have additional questions, go to www.northerntool.com
or contact us at 1-800-270-0810. Please note, engines
with the high-altitude kit installed operated at lower
altitudes could cause severe engine damage and affect
emissions compliance. When modified, a tag or decal
should be added to the product stating that a high-
altitude kit was installed and to remind you to re-service
the carburetor (re-jet) when operating in lower altitude
environments.
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