Maintenance, Engine Cleaning, Spark Plug

Section 5: Maintenance

WARNING

Before inspecting, cleaning or servicing the machine, shut off engine, wait for moving parts to stop, disconnect spark plug wire and move wire away from spark plug. Remove ignition key (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 engine 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 dam- age.

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.

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.

BATTERY (if applicable)

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 engine dealer.

753B, F753B specifications

The Troy-Bilt 753B, also known as the F753B, stands out as a powerful and versatile outdoor equipment tool designed for homeowners and landscaping professionals alike. This model is particularly recognized for its robust construction and user-friendly features, making yard maintenance a more efficient and enjoyable experience.

One of the prominent features of the Troy-Bilt 753B is its potent 4-cycle engine, which provides the necessary power to tackle a variety of tasks, from trimming and edging to clearing dense grass and weeds. Unlike many 2-cycle engines, the 4-cycle design allows for cleaner operation and reduced emissions, making it an environmentally friendly choice for users. This engine is engineered for easy starting, with a reliable recoil starting system that ensures you're ready to work without the hassle of complicated starting procedures.

The design of the Troy-Bilt 753B includes a well-balanced frame that enhances maneuverability, allowing users to navigate through tight spaces and around obstacles with ease. The adjustable handle system adds to the comfort, enabling users to tailor the machine's height and angle to their personal preference. This attention to ergonomics helps reduce fatigue during extended use.

In terms of versatility, the F753B model is equipped with a pivoting head that allows for multiple cutting angles, providing flexibility for a variety of trimming tasks. Whether you need to trim along fences, landscape borders, or in hard-to-reach areas, this feature makes the job simpler and more efficient.

Another significant attribute of the Troy-Bilt 753B is the bump feed head, which facilitates easy line advancement. When the cutting line wears down, users can simply tap the head on the ground to release more line, ensuring continuous operation without the need to stop and manually feed the line. This innovative feature enhances productivity and minimizes interruption during work.

Moreover, the Troy-Bilt 753B incorporates advanced vibration-dampening technology, which not only improves user comfort but also helps maintain precision during operation. This design innovation allows for longer working periods without the discomfort commonly associated with handheld tools.

Overall, the Troy-Bilt 753B, F753B is a reliable and efficient tool that combines power, user comfort, and cutting-edge features to meet the demands of even the most challenging yard work. Its robust build-quality and thoughtful engineering make it a preferred choice for both casual users and landscaping professionals looking for performance and durability.