MAINTENANCE AND REPAIR INSTRUCTIONS
17
FREQUENCY
MAINTENANCE REQUIRED
REFER TO:
Before Starting Engine
Fill fuel tank with correct oil and fuel mixture.
Page 11
Every 10 Hours
Clean and re-oil air filter.
Page 20
Every 50 Hours
Check spark plug condition and gap.
Page 22
NOTE:
Some maintenance procedures may require
special tools or skills. If you are unsure about
these procedures take your unit to an authorized
service dealer.
MAINTENANCE SCHEDULE
These required maintenance procedures should be
performed at the frequency stated in the table. They
should also be included as part of any seasonal tune-up.
WARNING:
To prevent serious personal
injury, never do maintenance or repairs with
unit running. Always do maintenance and
repairs on a cool unit. Disconnect spark plug
wire to ensure the unit will not start.
Fig. 21
Fig. 23
Fig. 22
LINE INSTALLATION
Always use genuine Ryobi 0.080 inch (2.03 mm.)
replacement line. Line other than specified may make
the engine overheat or fail.
WARNING:
To prevent serious personal
injury, never use metal-reinforced line, wire,
or rope, etc.. These can break off and
become a dangerous projectile.
There are two methods to replace the trimming line.
• Wind the inner reel with new line
• Install a prewound inner reel
NOTE:
Replacement line Part # 610375, or a prewound
reel, Part # 153577 can be purchased from your
local authorized dealer.
Winding the Existing Inner Reel
1. Hold the outer spool with one hand and unscrew the
Bump Knob™
counterclockwise
(Fig. 21). Inspect
the bolt inside the Bump Knob™ to make sure it
moves freely. Replace the Bump Knob™ if damaged.
NOTE:
A Bump Knob™, Part # 153066 can be
purchased from your local authorized dealer.
4. Use a clean cloth to clean the inner reel, spring,
shaft, and inner surface of the outer spool (Fig. 23).
2. Remove the inner reel from the outer spool (Fig. 22).
3. Remove spring from the inner reel (Fig. 22).
NOTE:
An inner reel spring, Part # 610317 can be
purchased from your local authorized dealer.
Inner Reel
Outer Spool
Spring
Bump Knob™
Shaft
Summary of Contents for 770rEB
Page 26: ...NOTES 26...
