MAINTENANCE AND REPAIR INSTRUCTIONS

ROCKER ARM CLEARANCE

This requires disassembly of the engine. If you feel unsure or unqualified to perform this, take the unit to an authorized service center.

NOTE: Inspect the valve to rocker arm clearance with a feeler gauge after the first 10 hours of operation and then every 50 hours of operation thereafter.

•The engine must be cold when checking or adjusting the valve clearance.

•This task should be performed inside, in a clean, dust free area.

1.Remove the muffler cover by pressing down on the corner with a flat blade screwdriver (Fig. 38). Slide the notches on the sides of the muffler cover over the tabs on the engine cover and remove

Engine Cover

Muffler Cover

Fig. 38

2.Remove the two (2) screws on top of the engine cover with a phillips screwdriver (Fig. 39).

Top View Of The Engine

Engine Cover

Remove Screws

Muffler

Fig. 39

3. Remove the screw behind the engine cover (Fig. 40).

Screw

Fig. 40

4.Disconnect the spark plug wire.

5.Clean dirt from around the spark plug. Remove the spark plug from the cylinder head by turning a 5/8 in. socket counterclockwise.

6.Remove the engine cover (Fig. 39).

7.Clean dirt from around the rocker arm cover. Remove the screw holding the rocker arm cover with a large flat blade screwdriver or Torx T25 bit

(Fig. 41). Remove the rocker arm cover and gasket.

Rocker Arm Cover

Spark Plug Hole

Fig. 41

8.Pull the starter rope slowly to bring the piston to the top of its travel, (known as top dead center). Check that:

•The piston is at the top of its travel while looking in the spark plug hole (Fig. 41).

•Both rocker arms move freely, and both valves are closed.

If not, repeat this step.

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Ryobi 875r manual Rocker ARM Clearance, Remove the rocker arm cover and gasket
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875r specifications

The Ryobi 875R is a robust and efficient string trimmer that has garnered attention for its reliability and performance. Designed for homeowners and landscaping professionals alike, this trimmer offers a powerful solution for maintaining lawns and gardens with ease.

One of the standout features of the Ryobi 875R is its powerful gas engine, which provides ample power for cutting through thick grass and weeds without bogging down. This gasoline-powered trimmer operates efficiently, making it suitable for larger areas where electric trimmers might struggle. The engine is designed for easy starting, ensuring that users can get to work quickly without the frustration of repeated pulls on the starter cord.

The Ryobi 875R also boasts a lightweight, ergonomic design that enhances maneuverability. Its balance and reduced weight allow for longer use without causing undue strain on the user’s arms and back. The adjustable handle is another ergonomic feature, enabling users to find the perfect grip and position for their comfort during extended trimming sessions.

A significant technological highlight of the 875R is its dual-string head. This feature allows for a wider cutting swath, making it possible to trim more grass in less time. The trimmer excels in tackling difficult areas of the yard, from edges along sidewalks to dense patches in flower beds. This dual-string system is also compatible with various types of trimmer lines, providing versatility based on user preference and job requirements.

Another key characteristic of the Ryobi 875R is its durable construction. The materials used in its design are intended to withstand the rigors of regular use, protecting it against wear and tear. Additionally, the trimmer is equipped with features such as a protective shield that safeguards the user from flying debris while enhancing safety during operation.

Maintenance is simplified with the Ryobi 875R, as it features an easy-access air filter and fuel cap that facilitate routine checks and refills. This ensures that users can dedicate their time to trimming rather than struggling with upkeep.

In summary, the Ryobi 875R stands out in the market for its powerful engine, ergonomic design, dual-string head technology, and durability. Whether tackling overgrown lawns or maintaining garden borders, this string trimmer delivers the performance and ease of use that both novices and seasoned landscapers appreciate.
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