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BBT-JD420
SERVICE & MAINTENANCE
Air Cleaner Service
A dirty air filter will restrict air flow to the carburettor, reducing engine performance. If you operate the engine
in very dusty areas, clean the air filter more often than specified in the MAINTENANCE SCHEDULE.
Operating the engine without an air filter, or with a damaged air filter, will allow dirt to enter the engine,
causing rapid engine wear. This type of damage is not covered by the Warranty.
Dual-filter-Element Type
Remove the wing nut from the air cleaner cover, and remove the
cover.
1. Remove the wing nut from the air filter, and remove the filter.
2. Remove the foam filter from the paper filter.
3. Inspect both air filter elements, and replace them if they are
damaged. Always replace the paper air filter element at the
scheduled interval.
4. Clean the air filter elements if they are to be reused.
5. Wipe dirt from the inside of the air cleaner base and cover,
using a moist rag. Be careful to prevent dirt from entering the
air duct that leads to the carburettor.
6. Place the foam air filter element over the paper element, and
reinstall the assembled air filter. Be sure the gasket is in place
beneath the air filter. Tighten the air filter wing nut securely.
7. Install the air cleaner cover, and tighten the cover wing nut
securely.
Sediment Cup Cleaning
1. Move the fuel valve to the OFF position, then remove the fuel sediment cup and O-ring.
2. Wash the sediment cup and O-ring in non-flammable solvent,
and dry them thoroughly.
3. Place the O-ring in the fuel valve, and install the sediment cup. Tighten the sediment cup securely.
4. Move the fuel valve to the ON position, and check for leaks. Replace the O-ring if there is any leakage.
Petrol is highly flammable and explosive.
You can be burned or seriously injured when handling
fuel.
• Keep heat, sparks and flame away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
WARNING
Air Filter
Cover
Wing Nut
Form Filter
Grid
Sediment
Cup
O-ring
Drain
Bolt
