MAINTENANCE AND REPAIR INSTRUCTIONS

9.Slide the feeler gauge between the rocker arm and the valve return spring. Measure the clearance between the valve stem and rocker arm (Fig 42). Do both intake and exhaust valves.

Rocker Arms

Adjusting Nuts

 

Feeler Gauge

Gasket

Fig. 42

The recommended clearance for both intake and exhaust is .003 – .006 in. (.076 – 0.152 mm). Use a standard automotive .005 in. (0.127 mm) feeler gauge. The feeler gauge should slide between the rocker arm and valve stem with a slight amount of resistance, without binding (Fig. 43).

Adjusting Nut

Rocker Arm

.003–.006 in.

(.076–0.152 mm)

Feeler Gauge

Valve Stem

Fig. 43

10.If the clearance is not within specification:

a.Turn the adjusting nut using a 5/16 inch (8 mm) wrench or nut driver (Fig. 42).

•To increase clearance, turn the adjusting nut counterclockwise.

•To decrease clearance, turn the adjusting nut clockwise.

b.Recheck both clearances, and adjust as necessary.

11.Reinstall the rocker arm cover using a new gasket. Torque the screw to 20–30 in•lb (2.2–3.4 N•m).

NOTE: A rocker arm cover gasket, Part # 182099 can be purchased from your local authorized dealer.

12.Reinstall the engine cover. Check alignment of the cover before tightening the screws. Tighten screws.

13.Replace the muffler cover. Slip the long tabs on the muffler cover into the engine cover. Slide the notches on the side of the muffler cover over the tabs on the engine cover and snap into place (Fig. 38).

14.Check the spark plug and reinstall. See Replacing the Spark Plug.

15.Replace the spark plug wire.

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Ryobi 875r manual Rocker Arms Adjusting Nuts Feeler Gauge 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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