Craftsman 247.887900 Manual Del Usuario página 17

Checking spark plug
Check spark plug yearly or every 100 operating hours
1. Clean area around spark plug.
2. Remove and inspect spark plug.
3. Replace spark plug if porcelain is cracked or if electrodes are
pitted, burned or fouled with deposits
4. Check electrode gap with a feeler gauge and set gap to .030
(0.76mm) if necessary. See Figure 14.
5. Reinstall spark plug and tighten securely.
NOTE: A resistor spark plug must be used for replacement. Contact a
Sears Parts and Repair Center for a replacement spark plug.
Carburetor
If you suspect your carburetor needs adjusting, see a Sears Parts and
Repair Center. Engine performance should not be affected at altitudes
up to 7,000 feet (2,134 meters). For operation at higher elevations,
contact a Sears Parts and Repair Center.
engine speed
WaRning
Avoid serious injury or death, DO NOT modify engine in any way.
Tampering with the governor setting can cause the engine and
equipment to operate at unsafe speeds. NEVER tamper with factory
setting of engine governor. Running the engine faster than the speed
set at the factory is dangerous.
lUbRiCation
gear shaft
The gear (hex) shaft should be lubricated at least once a season or
after every 25 hours of operation.
1. To prevent spillage, place a piece of plastic wrap under the gas
cap and tighten securely.
2. Carefully pivot the snow thrower up and forward so that it rests on
the auger housing.
3. Remove the lower frame cover from the underside of the snow
thrower by removing the four self-tapping screws which secure it.
4. Apply a light coating of engine oil (or 3-in-1 oil) to the hex shaft.
See Figure 15.
NOTE: When lubricating the hex shaft, be careful not to get any oil on
the aluminum drive plate or rubber friction wheel. Doing so will hinder
the snow thrower's drive system. Wipe off any excess or spilled oil.
Wheels
At least once a season, remove both wheels. Clean and coat the axles
with a multipurpose automotive grease before reinstalling wheels.
auger shaft
At least once a season, remove the shear pins on auger shaft. Spray
lubricant inside shaft, and around the spacers and flange bearings
found at either end of the shaft. See Figure 16.
SERVICE AND MAINTENANCE
2
1
1. .030 (.76 mm) Gap
2. Electrodes
3. Porcelain
17
3
Figure 14
Figure 15
Figure 16