McCulloch Mac 110 - Maintenance; Spark Plug; Fuel Tank Vent; Air Filter

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MAINTENANCE
All chain saw service, other than the items listed here in
your Owner's Manual maintenance instructions, should be
performed by your authorized McCulloch Servicing Dealer.
.Keep the saw, bar and chain clean. Do not allow the filters,
muffler, and cylinder fins to become plugged or covered with
sawdust, dirt or other foreign material. Never put dirty fuel
or chain oil into the saw.
SPARK PLUG
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For efficient operation of the saw engine, the spark plug
must be kept clean and properly gapped.
1. Push ignition stop switch to "OFF" position .
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, 2., Disconnect the black rubber connector on end of the wire
@from spark plug by twisting and pulling at the same time.
3. Remove spark plug with spark plug wrench. Do not use
any other tool.
4. Clean electrodes with emery cloth or fine sandpaper. Blow
all dust away. Do not use a grit-type cleaning machine.
Wear eye protection during this oper.ation. @
5. Adjust the electrode air gap to 0.025 in. (0.635 mm) by
bending side electrode only. @
6. Re-install spark plug and black rubber spark plug connec-
tor on end of ignition wire.
7. For replacement spark plugs of different heat ranges, see
your McCulloch dealer.
FUEL TANK VENT
The fuel tank or fuel cap is vented to prevent bUild-up of
either pressure or vacuum in the tank. Both conditions will
affect operation of the engine. The vent can become plugged
through the use of dirty fuel or dirt falling into the fuel tank
during refueling operations. If pressure or vacuum develops,
have your McCulloch dealer service the saw.
AIR FILTER
Never operate the saw without the air filter, or dust and dirt
will be sucked into the engine and damage it. The air filter
must be kept clean.
To clean the air filter:
1. Remove the air filter cover by loosening the screw. ®
2. Lift off the air filter and blow it clean with low air pressure
or wash it in fuel mix. Dry in open air and away from open
flame. ®
3. Reinstall the filter in its original position, centered within
the ring of small locating studs.
4. Reinstall the cover. Slide the edge on the forward end
under the flange of the starter cover, then press the rear
end of the filter cover down until it snaps into position,
'smooth and even all around the edges, and tighten retain-
ing screw.
STARTER COVER AND COOLING FINS
The air inlet openings of the starter cover and the cylinder
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