Craftsman 247.77466.1 Operator's Manual page 16

2
1
1. .030 (.76 mm) Gap
2. Electrodes
3. Porcelain
Figure 5-3
NOTE: Although multi-viscosity oils (5W30, 10W30, etc.) improve
starting in cold weather, they will result in increased oil consumption
when used above 32°F. Check your engine oil level more frequently to
avoid possible engine damage from running low on oil.
Change engine oil after the first five hours of operation, and every 50
hours thereafter. Change oil every 25 hours of operation if the engine
is operated under heavy load or in high ambient temperatures.
To Drain Oil
Drain oil while engine is warm. Follow the instructions given below.
1. To drain the gas tank, start the engine and let it run until the fuel
line and carburetor are empty.
2. Remove drain plug on the side of the engine and drain oil into a
suitable container.
3. When engine is drained of all oil, replace drain plug and refill with
approximately 20 oz. of fresh oil. Refer to Gas And Oil Fill-up in
OPERATION section.
Service Air Cleaner
The air cleaner prevents damaging dirt, dust, etc., from entering the
carburetor and being forced into the engine and is important to engine
life and performance.
WARNING: Never run the engine without an air
cleaner completely assembled.
MAINTENANCE
Service cartridge every 25 operating hours or every season. Service
cartridge more often under dusty conditions.
3
To Service Air Filter
1. Loosen air cleaner cover screw, but do not remove screw from
cover. Swing cover down to remove from hinge.
2. Inspect filter for discoloration or dirt accumulation. If either is
present, proceed as follows:
a. Clean inside of body and cover thoroughly and remove cartridge.
b. Reassemble new cartridge in the body. Swing cover down and
tighten the screw loosened earlier.
Service Spark Plug
• Clean the spark plug and reset the gap to.030" at least once a
season or every 50 hours of operation.
• Clean area around spark plug. Remove and inspect spark plug.
• Replace if electrodes are pitted, burned or the porcelain is cracked.
• Check electrode gap with wire feeler gauge and reset gap to.030
inches. See Figure 5-3.
NOTE: Do not sand spark plug. Spark plug should be cleaned with a
wire brush and a commercial solvent.
Clean Engine
• Clean engine periodically, by removing dirt and debris with a cloth
or brush.
NOTE: Cleaning with a forceful spray of water is not recommended as
water could contaminate the fuel system.
• To ensure smooth operation of the engine, keep the governor
linkage, springs, and controls free of debris.
• Every 100 hours of operation, remove combustion deposits from
top of cylinder, head, top of piston, and around valves.
16
Temperature of muffler and nearby areas may
exceed 150˚ F(65˚C). Avoid these areas.