Worx WG779, User Manual

2 in 1 Cordless Lawn Mower  EN

20

TO SHARPEN BLADE IN A VISE (See Fig. N)

1.   Be sure the switch lever is released, the 

blade has stopped and the safety key 
removed before removing the blade.

2.   Remove blade from mower. See instructions 

for removing and attaching blade.

3.   Secure blade N-1 in a vise N-2.
4.   Wear safety glasses and be careful not to 

cut yourself.

5.   Carefully file the cutting edges of 

the blade with a fine tooth file N-3 or 
sharpening stone.

6.   Check balance of blade. See instructions 

for blade balancing.

7.   Replace blade on mower and tighten 

securely. Refer to instructions below.

BLADE BALANCING (See Fig. O)

Check balance of blade by placing center 
hole in blade O-1 over a nail or screwdriver 
shank O-2, clamped horizontally in a vise O-3. 
If either end of the blade rotates downward, 
file that end. Blade is properly balanced when 
neither end drops.

BLADE MAINTENANCE (See Fig. P1, P2)

Renew your metal blade after 50 hours 
mowing or 2 years, whichever is the sooner-

regardless of condition.
Follow these procedures to remove and 
replace the blade. You will need garden 
gloves (not provided) and a spanner wrench 
(not provided) to remove the blade. Hold the 
blade (20) and unscrew the blade bolt (19) 
counter-clockwise using a spanner wrench, 
and then remove blade.
To re-assemble, position the blade (20) with 
the cutting edges towards the ground. Then 
securely tighten the blade bolt (19).

STORAGE (See Fig. M1, M2)

Stop the mower and always remove the 
safety key. Clean the exterior of the machine 
thoroughly using a soft brush and cloth. Do 
not use water, solvents or polishes. Remove 
all grass and debris, especially from the 
ventilation slots.
Turn the machine on its side and clean the 
blade area. If grass cuttings are compacted 
in the blade area, remove with a wooden or 
plastic implement.
Store the machine in a dry place. Do not place 
other objects on top of the machine.
To aid storage, release the handle knob, and fold 
the upper handle as shown in Fig. M1 & M2 .

TROUBLE SHOOTING

Problem

Solution

1. Mower doesn’t run 
when switch lever is 
activated.

A. Check to make sure safety key has been installed and is fully 
seated and that button on switch housing is being completely 
pushed.
B. Release Switch Lever to turn mower off. Remove safety key, 
turn mower over and check that blade is free to turn. If not free, 
return to an authorized servicer. Blade should turn freely.
C. Has battery been fully charged? Plug in charger and wait for 
green light to come on.

2. Motor stops while 
mowing.

A. Release Switch Lever to turn mower off. Remove safety key, turn 
mower over and check that blade is free to turn. If not free, return to 
an authorized servicer. Blade should turn freely.
B. Raise cutting height of wheels to highest position and start 
mower.
C. Has battery been fully charged? Plug in charger and wait for green 
light to come on.
D. Avoid overloading the mower. Slow down the cutting pace by 
pushing mower slower or raise the cut height. Or both.