10 CENTS
Model Nos. ni-150
111-180
ROTARY MOWER
For one year from date of purchase, MTD Products Inc ,
will replace for the original purchaser, free of charge, F.O.B.
factory or authorized service firm, any part or parts found to
be defective in material or workmanship. All transportation
charges on parts submitted for replacement under this war
ranty must be paid by the purchaser. This warranty does not
include replacement of parts which become inoperative
through misuse, excessive use, accident, neglect, improper
maintenance or alterations by unauthorized persons. This
warranty does not include the engine, motor, battery, bat
tery charger or any component parts thereof. For service on
these units refer to the applicable manufacturer's warranty.
The above warranty will apply only to the original owner
and will be effective only if the warranty card has been pro
perty processed. It will not apply where the unit has been
used commercially.
Warranty service is available through your local author
ized service dealer or distributor. UNDER NO CIRCUM
STANCES WILL THE RETURN OF A COMPLETE UNIT
BE ACCEPTED BY THE FACTORY UNLESS PRIOR
WRITTEN PERMISSION HAS BEEN EXTENDED.
Your rotary mower is a precision piece of power equip
ment, not a plaything. Therefore exercise extreme caution
at all times.
1. Remove all sticks, stones, wire and other hazardous items
from lawn before mowing. Such items are dangerous to
both the mower and individuals in the vicinity of the
mower.
2. Always disconnect spark plug cable during repairs or re
fueling operations.
3. Always start engine from side opposite discharge chute.
4. NEVER place hands or feet under mower or near dis
charge chute while engine is running.
5. Do not tilt mower at extreme angle while engine is run
ning. Cut grass on hills and banks sideways, not up and
down.
6. Always stop engine when not cutting grass.
7. Do not fill gas tank while engine is running. Do not spill
gasoline on hot engine.
8. Keep children and pets away from area at all times during
mowing operation. Never allow mower to discharge grass
toward any person.
9. Do not attempt to start engine while mower is resting in
high grass.
10. Check all nuts and bolts, particularly the blade bolts, for
tightness. This is especially important during the initial
operation period. Make this same check periodically
thereafter.
11. While operating the mower, if any foreign object is struck,
stop the mower and inspect for damage. Do not restart
or operate the mower until all damage has been repaired.
WARNING: Should excessive vibration develop, check your
blade and crankshaft immediately. Do not operate mower
with an unbalanced blade, a damaged blade or a damaged
crankshaft.
:MTD I=>R,0IDUCTS INC
• 5339 west I30fh ST.
P.O. BOX 2741 CL EVEL AND, OHIO 44111
FORM NO. 770-3320A
^—w
111-150
111-180
CHANGE OIL
Change oil after first 5 hours of op
eration while engine iswarm. There
after change oil every 25 hours of
operation while engine is warm.
Engine may be drained through oil
filler opening Be sure to replace
drain plug and oil filler cap.
FORM NO. 770-3320B
\ 0
37^-0
38-^ 1 ^
When ordering replacement parts,
be sure to specify your mower model
number, part number, description of
part, and the number of parts re
quired. . . Parts and service should
be handled by your nearest author
ized service firm as recommended
by your dealer. Request for paris
and service received at the factory
will be forwarded to the appropriate
Central Service Distributor in your
area for handling.
1.
3)'
/
PARTS LIST FOR MOWER MODEL NOS. 111-150 and 111-180
Ref.
Part No.
111-150
No.
... -
1
710-158
2
738-102
3
4 504-9392
736-105
5
310-10415
6
736-119 736-119
7
712-123
8
437-10909
9
310-10414
10
714-365 ' .
11
748-189
12
13 312-7582
736-217
14
15 710-459
710-117 710-117
16
17 901-10769
18 305-7006
714-104 714-104
19
746-128 746-128
20
310-7016
21
712-107
22
710-106 710-106
23
24 310-9364
710-606
25
710-129
26
305-7071
27
712-526
28
710-437
29
310-8511
30
310-10029 310-10029
710-407 710-407
31
437-10611
32
33 305-7470
34 310-8506
310-9996
35 901-7627
732-141
36
305-7520
37
38 310-8313
736-105 736-105
39
40 712-116
41
310-7492
42 710-209 710-209
43 310-10408 310-10408
310-10409 310-10409
44
437-7857
45 305-9973
46 305-9871 305-9871
Part No.
111-180
—
710-158
738-102
505-9392
736-105
310-10415
Engine
Hex Head Cap Screw 5/16-24 x 1-1/4” Lg. *
Axle Bolt
Wheel Assembly - Complete
Belleville Washer
Height Adjuster Complete - L.H.
Spring Lockwasher 5/16 Screw *t
712-123
437-10911
310-10414
714-365
748-189
312-7581
736-217
710-459
Hex Nut 5/16—24 Thread *f
Deck Assembly
Height Adjuster Complete — R.H.
Hi Pro Key #505 *t
Blade Adapter t
Blade
Spring Lockwasher 3/8 Screw Heavy Duty *t
Hex Head Cap Screw 3/8-24 x 1-1/2” Lg. Heat Treated f
Hex Head Cap Screw 5/16—24 x 1” Lg. Heat Treated t
901-10769
305-7006
Blade Adapter Kit/Less Blade
Fortiflex Bearing
Hairpin Cotter
Cable Clip
310-7036 Lower Handle
712-107
Hex Center Locknut 1/4—20 Thread *
Hex Head Cap Screw 1/4-20 x 1-1/4” Lg. *
310-9364
710-606
710-129
Upper Handle
Hex Head Cap Screw 1/4—20 x 1-1/2” Lg. *
Round Head Self Tapping Screw #8—32 x 5/16” Lg. *
305-7071 Grip
712-526 Speed Nut
710-437
310-8511
Round Head Machine Screw #10—24 x 1/2” Lg.
Throttle Control — Complete
Throttle Control — Complete (Optional Cover)
Slot Hex Head Extension Screw #8—32 x 1/2” Lg.
437-10611
305-7470
310-8506
310-9996
Engine Shroud (Optional)
Throttle Control - Knob ft
Throttle Control — Bracket ft
Throttle Control — Bracket (Optional Cover)
901-7627 Ferrule Assembly ft
732-141 Conduit and Wire ft
305-7520
Knob — Height Adjuster **
310-8313 Spring Lever **
Belleville Washer
712-116
310-7492
Elastic Stop Nut **
Pivot Bar **
Sems Hex Head Cap Screw 3/8—16 x 5/8” Lg. **
Index Plate — R.H. **
Index Plate - L.H. **
437-7857 Handle Panel
305-9973 Control Cover (Optional)
Hub Cap (Not Shown) (Optional)
DESCRIPTION
* For faster service obtain standard nuts, bolts and washers locally. If these items cannot be obtained locally, order by part
number and size as shown on the parts list.
t Part of Blade Adapter Kit/Less blade (901-10769). ** Part of Height Adjuster Complete (310-10414—R.H., 310-10415—L.H.).
ft Part of Throttle Control Complete (310-8511). (Optional 310-10029).
NOTE! This instruction manual covers various models, and all acces
sories shown do not necessarily apply to your model mower.
If repairs or service is needed on the engine, please contact your
nearest authorized engine service outlet. Check the "Yellow Pages’’
of your telephone book under "Engines— Gasoline.’’
Find It Fait
In Th*
'Yellow Pages'
FORM NO. 77a3320C
ASSEMBLY INSTRUCTIONS
Your new mower is shipped preassembled with the exception
of the handle and throttle control assembly.
1. Remove lawn mower and all parts from carton. Make cer
tain that all loose parts and literature are removed from
carton before carton is discarded.
2. Extend throttle control assembly, which is attached to
engine at rear of mower, and place on floor. CAUTION:
Do not bend or kink control wire.
3. Snap lower handle into position on two lugs which extend
from either side on rear of the deck.
4. Assemble the two upper handle parts with cap screw in
lower holes. Place speed nut on control. Line up control
mounting holes with top holes in upper handle and secure
with cap screw (yellow) and locknut. Do not tighten.
5. Attach upper handle to lower handle with cap screws in
lower holes only. Do not tighten.
6. Fasten control panel to upper handle with cap screws in
lower holes and round head machine screw through upper
hole. Tighten all nuts.
7. Secure control wires to lower handle with cable clips.
OPERATION
NOTE: For shipping purposes your mower is set with the
wheels in a low cutting height position. For best results,
raise the cutting position until it is determined which height
is best for your lawn. See adjustments.
1. Service engine with gas and oil. See Engine Manual
packed with lawn mower for complete instructions for the
care and maintenance of engine. READ DIRECTIONS
CAREFULLY.
2. When ready to start engine, place throttle control lever in
“START” position and start engine in accordance with
instructions in Engine Manual. After engine starts, move
throttle control lever to desired engine speed. The engine
is stopped by placing control lever in the “STOP” position.
3. Be sure that lawn is clear of stones, sticks, wire or other
objects which could damage lawn mower or engine. For
best results and to insure more even grass distribution,
do not mow when lawn is excessively wet.
ADJUSTMENTS
CAUTION: Do not at any time make any adjustment to lawn
mower without first stopping engine and disconnecting spark
plug wire.
EASY CUTTING HEIGHT - An adjusting plate and thumb
lever at each wheel position provides cutting height adjust
ment. Each adjusting plate has five holes. Height of cut will
be changed when the thumb lever is moved from one hole to
another. Simply depress thumb lever towards wheel and move
wheel and lever assembly to desired position. Cutting height
will be raised as lever is moved toward front and lowered as
lever is moved toward rear. All wheels must be positioned in
relative height of cut positions.
STANDARD CUTTING HEIGHT - Adjustment may be made
by removing and moving wheel studs to desired position.
Cutting heights will be raised as wheel studs are moved to
a lower hole and lowered as wheel studs are moved to a
higher hole in the deck. All wheel studs must be mounted in
a relative position to the deck.
THROTTLE - If adjustment becomes necessary, the throttle
control wire assembly can be reset as follows:
1. Loosen, but do not remove, screw securing throttle
control wire assembly at engine.
2. Move throttle control lever on handle to “FAST” position.
3. Move lever, to which control wire is fastened at engine,
to full open position and retighten screw to secure throttle
control wire assembly.
LUBRICATION
IMPORTANT: Always stop engine and disconnect spark plug
wire before cleaning, lubricating or doing any kind of work
on lawn mower.
WHEELS: Wheel beatings ate of lifetime Fortiflex. They
require no lubrication.
THROTTLE: Periodically lubricate throttle control lever and
throttle wire assembly with a few drops of light oil (S.A.E.
No. 10 or 20) for ease of operation.
ENGINE: Follow Engine Manual for lubrication instructions.
MAINTENANCE
CUTTING BLADE - The blade may easily be removed for
grinding or replacement as follows:
1. Remove bolt and lock washer holding blade and hub
assembly to engine crankshaft.
2. Remove blade and hub assembly from engine crankshaft.
3. Remove two bolts, lockwashers and nuts holding blade
to blade hub.
When sharpening blade, follow the original angle of grind as
a guide. It is extremely important that each cutting edge
receives an equal amount of grinding to prevent an unbal
anced blade. An unbalanced blade will cause excessive
vibration when rotating at high speeds and may cause damage
to the mower.
Upon reassembly, make certain all parts are assembled
properly and tightened securely.
DECK - The underside of mower deck should be cleaned
after each period of use as grass clippings, leaves, dirt and
other matter will accumulate. This accumulation of grass
clippings, etc. is undesirable as it will invite corrosion and
may cause an uneven discharge of grass clippings at the
next cutting.
The deck may be cleaned by tilting the mower forward or on
its left side and scraping clean with a suitable tool or by
washing with a stream of water from a garden hose.
CAUTION: Do not direct the stream of water at a hot engine
as damage to the engine may result.
STORAGE - The following steps should be taken to prepare
lawn mower for storage.
1. Clean and lubricate mower thoroughly as described in the
preceding instructions.
2. Refer to Engine Manual for correct engine storage
instructions.
3. Coat mower’s cutting blade with chassis grease to
prevent rusting.
4. Place blocks under deck to raise tires clear of floor.
5. Store mower in a dry, clean area.
USING YOUR MOWER
For best results, do not cut wet grass because it tends to
stick to underside of the mower thus preventing proper dis
charge of grass clippings. If wet grass must be cut, reduce
engine speed and walking speed to help distribute the
clippings more effectively.
New grass should be treated as wet grass, otherwise a normal
walking speed is about the right pace for efficient mowing.
The best mowing pattern is one that allows the' clippings to
discharge towards the uncut part of the lawn. This permits
recutting of the clippings to further pulverize them. When
cutting high weeds, discharge towards cut portion, then recut
at right angles to first direction.
Lawn should be cut in the fall as long as there is growth.
FORM NO. 770-2869D
PRINTED IN U.S.A.
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