TRIMMER

Always observe safety rules when per- forming any maintenance.

TIRES

Keep tires free of gasoline, oil, or insect control chemicals which can harm rub- ber.

Avoid stumps, stones, deep ruts, sharp objects and other hazards that may

cause tire damage.

TRIMMER LINE

For best results, replace trimmer lines when they have worn to half their original

length. Use .155 inch diameter trimmer line. Cut new trimmer line length to 18-3/4 inches. After new line is installed on

trimmer head, check all lines so they do not vary more then one (1) inch in length. This is important to make sure the trim- mer head is balanced and will not vibrate

abnormally.

_kWARNING: Use only the specified trimmer line. Do not use other materials

such as wire, string, rope, etc. Wire can break off during trimming and become a dangerous missile that can cause serious injury.

TO CUT LINE TO PROPER LENGTH NOTE: Trimmer line pre-cut to proper length is available for this unit; see the Repair Parts section of this manual.

If trimmer line is purchased in bulk, it must be cut to 18=3/4 inches before using. Use the built-in length guage as follows:

1.From front of trimmer, place the end of spooled trimmer line at the mark on the side of the debris shield as shown.

2.Wrap trimmer line around front of chas- sis cover to other side and cut at the "22" mark (your unit's width of cut).

Chassis cover

WRAP LINE _,ROUND

Debris

 

New

shield

End of

trimmer

mark

spooled line

line

TO REPLACE TRIMMER LINE

1.Disconnect spark plug wire from spark plug and place wire where it cannot come in contact with spark plug.

2.Remove worn trimmer line from line carrier plate.

3.Fold new, cut to length, trimmer line in half and insert folded end through carrier plate opening to back side of retainer clip.

4.With folded end of line at back side of retainer clip, pull line outward until line is fully seated under the retainer clip.

5.Repeat on other side of carrier plate.

6.Check all lines to be sure they are the same length.

7.Reconnect spark plug wire to spark plug.

Trimmer line

Carrier plate opening

Retainer clip

10

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Craftsman 917.77374 owner manual Tires, Wrap Line ,ROUND, To Replace Trimmer Line