Maintenance, Engine Cleaning, Spark Plug | White Outdoor 933E, 933R

Section 5: Maintenance

WARNING Before inspecting, cleaning or servicing the unit, shut off engine, wait for all parts to come to a complete stop, disconnect spark plug wire and move wire away from spark plug. Remove ignition key on electric start models. Failure to follow these instructions can result in serious personal injury or property damage.

ENGINE CLEANING

•Stop engine, wait for parts to stop moving, disconnect spark plug wire, and allow engine to cool before in- specting or cleaning engine.

•Daily or more often, before running en- gine, remove grass and chaff from recoil finger guard or rotating screen to prevent engine damage caused by overheating.

Also keep cooling vanes, governor link- age, springs and controls free of debris.

•Daily or more often, before running en- gine, clean muffler area (be sure muffler is cool) to remove all grass and com- bustible debris. If engine is equipped with a spark arrestor screen, remove as- sembly every 50 hours for cleaning and inspection. Replace if damaged.

•Grass or chaff may clog engine's air cooling system, especially after pro- longed operation cutting tall, dry grass. See Engine Owner's Manual for instruc- tions on cleaning underneath the engine blower housing.

AIR CLEANER SERVICE

Improper air cleaner maintenance can cause engine damage. Refer to the Engine Owner's Manual for more com- plete air cleaner service information.

SERVICE SCHEDULE:

Outer foam pre-cleaner - wash and re-oil every 25 operating hours or every sea- son, whichever occurs first.

Inner paper cartridge - clean or replace every 100 operating hours or every sea- son, whichever occurs first.

To Service Air Cleaner (Figure 5-3):

1.Stop engine, wait for parts to stop moving, and disconnect spark plug wire.

2.Unscrew mounting screws and/or re- move knobs (D). Remove covers (E). Remove paper cartridge (B) and foam pre-cleaner (A). Separate foam pre- cleaner from paper cartridge.

3.Wash foam pre-cleaner (A) in liquid

E		D
E
	A	B
	A

Figure 5-3: Briggs and Stratton air cleaner assembly.

detergent and warm water. Squeeze dry in a clean cloth.

4.Saturate foam pre-cleaner in clean en- gine oil. Wrap in clean, absorbent cloth and squeeze to remove all excess oil.

5.Replace paper cartridge (B), if necessary.

6.Reassemble air cleaner components. Tighten knobs/screws (D) securely. Secure cover assembly (E) on air cleaner body.

SPARK PLUG

Inspect the spark plug (Figure 5-4) after every 100 hours of operation. Be sure the gap is set at .030". Do not reuse plug if it is severely worn or damaged.

Best results are obtained with a new plug. See Engine Owner's Manual to de- termine proper replacement plug. Use of incorrect plug can cause engine damage.

NOTE: Do not clean spark plug in ma- chines which use abrasive grit. Clean spark plug by scraping or wire brushing, or washing with a commercial solvent.

.030" Feeler Gauge

Figure 5-4: Spark plug.

BATTERY (if applicable)

WARNING

Charge battery only with charger sup- plied with machine. Do not short circuit battery wires. Remove any jewelry be- fore working on or near the battery or electric start system. Failure to follow these instructions could result in per- sonal injury or property damage.

Charge battery if unit is to be stored for longer than three weeks. During the mowing season, the battery is kept charged by the charging system on the engine.

To Charge Battery:

1.Plug charger connector into wire har- ness connector located below ignition switch in handlebar console.

2.Plug charger into 120V wall outlet. (Note that battery charger is designed for use indoors and should not be exposed to rain or snow.)

3.Charge battery for 24-48 hours if unit is to be stored for longer than three weeks.

4.After charging, unplug charger from outlet, then unplug charger from con- nector on wire harness located below handlebar console.

CARBURETOR

The carburetor is adjusted at the factory. It should not need to be reset. If black exhaust is noted, check the air cleaner first. An over-rich mixture is usually caused by a poorly serviced or clogged air cleaner element, not an improperly adjusted carburetor. If readjustment is necessary, refer to Engine Owner's Manual or contact your local authorized dealer.