Craftsman 247.887210 - Manual (Page 14)

SERVICE AND MAINTENANCE
A warning
Always stop engine, disconnect spark plug wire, and ground against
engine before performing any type of maintenance on your machine.
GENERAL RECOMMENDATIONS
• Always observe safety rules when performing any maintenance.
• The warranty on this lawn mower does not cover items that have
been subjected to operator abuse or negligence. To receive full
value from warranty, operator must maintain the equipment as
instructed here.
• Changing of engine-governed speed will void engine warranty.
• All adjustments should be checked at least once each season.
• Periodically check all fasteners and make sure these are tight.
ENGINE MAINTENANCE
Checking the Spark Plug
Clean spark plug and reset the electrode gap to 0.030” at least once a
season; replace every 100 hours of operation.
• Clean area around the spark plug base. Do not sandblast spark
plug. Spark plug should be cleaned by scraping or wire brushing
and washing with a commercial solvent.
• Remove and inspect the spark plug. Check gap to make sure it is
set at .030”. See Figure 12.
• Replace the spark plug it electrodes are pitted, burned, or the
porcelain is cracked.
Servicing the Air Cleaner
A CAUTION
Do not use pressurized air or solvents to clean the air cleaner
cartridge.
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. Never run the engine without an air cleaner
completely assembled.
Clean or replace the air cleaner every 25 hours of operation.
1. Loosen screws that hold the air filter cover.
2. Open cover and remove cartridge. See Figure 13.
3. Install new air cleaner cartridge. Cartridge must fit securely in
base.
4. Place cover over air cleaner.
5. Tighten screws.
NOTE: If the filter is torn or damaged in any way, replace it.
A CAUTION
After servicing the air cleaner, be sure all the removed parts are
reinstalled properly in place. Failure to securely fasten together air
cleaner case and air cleaner body may cause dirt or other foreign
materials to enter the engine while it is running, resulting in engine
troubles or failures.
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