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CONTROLS

BLADE CONTROL HANDLE

WARNING: This con trol mech a nism
is a safety de vice. Never at tempt to
by pass  its  op er a tions.

The blade con 

trol han 

dle is lo 

cated on the

up 

per han 

dle of the mower. See Fig 

ure 1.

The blade con trol han dle must be de pressed 
in or 

der to op 

er 

ate the unit. Re 

lease the

blade con trol han dle to stop the en gine and
blade.

WARNING: The blade will be ro 

tat 

-

ing when ever the en gine is run ning

.

RECOIL STARTER

The recoil starter handle is attached to the
handle. See Figure 3. Stand behind the unit
in the operating position to start the unit.

IGNITION SWITCH (Electric Start Units
Only)

The ignition switch is located on the left side 
of the handle panel. It is used for starting
only. See Figure 4.

DRIVE CLUTCH CONTROL

Squeezing the drive clutch control engages
the drive system. Releasing the clutch
control disengages the drive system.
Release the clutch control to slow down
when negotiating an obstacle, making a turn 
or stopping.

SHIFT LEVER

The shift lever is located on the drive clutch
control housing on the upper handle. See
Figure 1. This lever is used to select the
forward speed of the mower. When changing 
your speed selection, release the drive
clutch control.

NOTE: 

 

Only move the shift le ver when

the en 

gine is run 

ning. Changing the

shift le 

ver set 

ting with the en 

gine off

can cause dam age to the mower.

CUTTING HEIGHT ADJUSTMENT LEVER
(Models: 959 & 979)

The height ad 

juster de 

ter 

mines the cut 

ting

height of the mower. The ad juster is lo cated
above the left rear wheel. To ad just the cut -
ting height, pull the le ver out and away from
the mower and then move it for ward or back
to se lect a new cut ting height. See Fig ure 5.

CUTTING HEIGHT ADJUSTMENT LEVER
(Model: 999)

The 

rear wheel 

height  ad juster  de ter mines

the cut ting height of the mower. The ad juster 
is lo cated above the left rear wheel. To ad -
just the cut ting height, pull the le ver out and
away from the mower and then move it for -
ward or back to se lect a new cut ting height.
See Fig ure 5.

The 

front wheel

 cut ting height is de ter mined 

by the se 

lec 

tion of one of six po 

si 

tions in

each caster as sem bly. See Fig ure 6.

To ad just, re move the wing nut from the axle 
bolt. Slide the axle bolt and spring washer
from the as 

sem 

bly and se 

lect a cut 

ting

8

 

Fig ure  2

Carriage

Bolt

Wing Nut

Upper Hole

Place the hairpin clips in the inner hole.

Weld Pin

Lower Handle

Fig ure 4-(Elec tric Start Units Only)

Ignition Key (Switch)

Fig ure  3

Rope
Guide

Recoil
Starter

Lower
Handle

Support
Rod

Summary of Contents for OG-4905

Page 1: ...Owner s Manual SET UP OPERATION MAINTENANCE IMPORTANT Read Safety Rules and Instructions Carefully PRINTED IN CANADA OG 4905...

Page 2: ...Please have your model number and serial number ready when you call NOTE Although both numbers are important you will be asked to enter only your serial number before your call can be processed For mo...

Page 3: ...used by slipping or tripping Do not hold on to the mower if you are falling release the handle immediately Never pull the mower back toward you while you are walking If you must back the mower away fr...

Page 4: ...art of this manual to measure slopes before operating this unit on a sloped or hilly area If the slope is greater than 15 degrees do not mow it DO Mow across the face of slopes never up and down Exerc...

Page 5: ...gine exhaust contains car bon monoxide an odorless and deadly gas Before cleaning repairing or inspecting make certain the blade and all moving parts have stopped Disconnect the spark plug wire and gr...

Page 6: ...a w a g n i t a r e p o f I y r u j n i s u o i r e s e s u a c d n a n r u t r e v o d l u o c r e w o m g n i d i r A y r u j n i s u o i r e s n i g n i t l u s e r p i l s d l u o c u o y d n a g...

Page 7: ...ing brackets Place the hairpin clips in the inner hole See Figure 2 Place one carriage bolt found in the hard ware pack included with your unit in the upper hole of the right handle mounting bracket f...

Page 8: ...changing your speed selection release the drive clutch control NOTE Only move the shift lever when the engine is running Changing the shift lever setting with the engine off can cause damage to the m...

Page 9: ...anual packed in your mower Read instructions carefully WARNING Never fill fuel tank in doors with engine running or until the engine has been allowed to cool for at least two minutes after running BEF...

Page 10: ...me engine as instructed in the separate engine manual packed with your unit If your unit is equipped with a two speed control on the engine refer to the separate engine manual packed with your unit St...

Page 11: ...you the best cut and do the most effective job of mulching WARNING If you strike a foreign object stop the engine Remove wire from spark plug thoroughly in spect the mower for any damage and repair th...

Page 12: ...may also be used to determine the position in which the drive clutch control is engaged If it is more comfortable to have the drive engaged with the lever further away from the handle tighten the driv...

Page 13: ...e instructions Maintain engine oil as instructed in the sepa rate engine manual packed with your unit Read and follow instructions carefully Under normal conditions service air cleaner as instructed i...

Page 14: ...rt over the blade with the tabs in the holes of the blade and insert the hex bolt Tighten the hex bolt to the torque listed below Blade Mounting Torque Center Bolt 450 in lb min 600 in lb max To insur...

Page 15: ...e lower pulley assembly and re move the old belt from around the crankshaft See Figure 25 15 Place the new belt over the transmission pulley Start the belt in pulley groove and rotate pulley until bel...

Page 16: ...se screws 25 Lightly lubricate the crankshaft and reinstall blade and blade adapter as described in the Cutting Blade section 26 Tip the mower back on its wheels 27 Make certain to retest the unit for...

Page 17: ...ower in a dry clean area STORAGE OF THE BATTERY The battery must be stored with a full charge A discharge battery will freeze IMPORTANT All batteries discharge during storage Recharge battery every tw...

Page 18: ...120 days from the date of purchase MTD PRODUCTS LIMITED will replace the defective battery for the original purchaser for a cost of one half 1 2 of the current retail price of the battery in effect a...

Page 19: ...not adjusted prop erly 1 Fill crankcase with proper oil 2 Remove blower housing and clean 3 Adjust carburetor Idles poorly 1 Spark plug fouled faulty or gap too wide 2 Carburetor improperly adjusted 3...

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