GB - 21
4. Tighten lower
cable nut to 1/8"
(3mm) below
bracket. Release
z-bend bracket.
5. Tighten upper
cable nut until
bracket is secure
between cable nuts.
6. Engage engine/blade control. Measure
distance between middle of z-bend and
cable bracket. Measurement should be
as shown below.
7. If correct measurement cannot be set,
contact your local dealer.
DRIVE BELT REPLACEMENT (self-
propelled models)
To remove drive belt:
1. Set the right rear wheel to its lowest
cutting height, and the left rear wheel to
the third cutting height. This position
provides clearance between friction disc
and drive sheave.
2. Remove belt from the idler, then the drive
sheave, and finally, the engine pulley
(Figure 13).
3. Pull belt through opening under mower
pan and over blade.
4. Make sure the idler pulley turns and the
idler arm moves freely.
5. Reinstall drive belt in reverse order.
IMPORTANT:
Be sure the belt seats in sheave
and pulley grooves with the idler touching the
back (flat) side of belt.
6. Adjust rear wheels to the same cutting
height.
1/8”
(3mm)
OM1020
OM1030
1.325"-1.788"
(3.4cm - 4.5cm)
Briggs & Stratton
OM1051
1. Blade
2. Bolt, Lock Washer &
Flat Washer
3. Drive Belt
4. Idler
5. Drive Sheave
6. Engine Pulley
Figure 13
1
2
3
4
OM1250
6
5
