ryan LAWNAIRE IV User manual

Part No. 524483 Rev. 3
TECHNICAL MANUAL
Safety, Operations, Maintenance, Parts
LAWNAIRE IV

MODELS 544863B STANDARD
MODELS 544881A COMMERCIAL

500–11–00–CU 2000 Textron Inc. All Rights Reserved.
Lincoln, Nebraska •Printed in U.S.A.
GENERAL INFORMATION
To make sure you are fully aware of safety and service
information, the following two symbols are used
throughout this manual.
!This “HAZARD” symbol is used to alert you to
information about unsafe actions or situations, and will
be followed by the word DANGER, WARNING, or
CAUTION. Used with the word DANGER it will describe
immediate hazards that may result in severe personal
injury or death. With the word WARNING it will describe
unsafe actions or situations that may cause severe
injury, death and/or major equipment or property
damage. With the word CAUTION it will describe unsafe
actions or situations that may cause injury, and/or minor
equipment or property damage.
NOTICE This NOTICE symbol is used to alert you
to information that describes procedures or tips that will
help you operate and maintain your equipment properly.
IMPORTANT!
THIS MANUAL WILL AID YOU IN THE SAFE
OPERATION AND PROPER MAINTENANCE OF
YOUR EQUIPMENT. ANYONE WHO WILL BE
OPERATING THE EQUIPMENT SHOULD READ THE
MANUAL THOROUGHLY BEFORE ATTEMPTING
OPERATION.
IF ANY PORTION OF THIS MANUAL IS NOT CLEARLY
UNDERSTOOD, CONTACT AN AUTHORIZED
DEALER FOR CLARIFICATION.
WARNING
!
The information and instructions included in
this manual alert you to certain things you
should do very carefully. If you don’t, you could:
•hurt yourself or others
•hurt the next person who operates the
equipment
•damage the equipment.
This manual contains essential operation and
safety information and must remain with the unit
at all times, within easy access of any operator.
Additional operator’s manuals are available through your
dealer.
IMPORTANT!
THIS EQUIPMENT SHOULD NOT BE MODIFIED OR
ADDED TO WITHOUT THE MANUFACTURER’S
AUTHORIZATION.
Contact your dealer for correspondence with the factory.
WARNING
!
Altering this equipment in any manner which
adversely affects the operation, performance,
durability or use may cause hazardous
conditions.
PRODUCT REFERENCE
Information in this manual may refer to a specific
product, brand name, number or tool. Unless specifically
stated otherwise, an equivalent product may be used.
ILLUSTRATIONS & SPECIFICATIONS
All information, illustrations and specifications contained
in this manual are based on the latest product
information available at the time of printing. Textron
Golf, Turf and Specialty Products reserves the right is to
make changes at any time without notice.
PRODUCT REGISTRATION
Textron Golf, Turf and Specialty Products makes every
effort to keep owners informed of all safety related
information. Therefore, changes in address and/or
ownership should be reported to the manufacturer.
Your dealer has REGISTRATION CHANGE forms which
will be filled out and filed by the dealer for his records, and
a copy will be sent to the manufacturer.
For the location of the dealer nearest you, call
1–800–228–4444 (for dealer information only)
or you may write directly to:
Textron Golf, Turf and Specialty Products
Warranty Dept.
P.O. Box 82409
Lincoln, Nebraska 68501–2409

1
INDEX Page
Controls 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Owner Registration Inside Front Cover. . . . . . . . . . . .
Paint, Touch Up 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Lists
Aerator And Drive Group 10. . . . . . . . . . . . . . . . .
Chassis 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Controls And Handle Group 14. . . . . . . . . . . . . . .
Height Adjuster And Transport Frame 16. . . . . .
Service 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Publications Inside Front Cover. . . . . . . . . . .
Set–Up 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transporting 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty 21-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MODEL NUMBER AND
SERIAL NUMBER LOCATION
The units model number and serial numbers are printed
on the Nameplate/Identification decal located on the left
side of the aerator frame. See Figure 1.
4192
Figure 1. Model Number And Serial Number
SPECIFICATIONS
Engine Lawnaire IV Model 544863B
Briggs & Stratton 3.5 HP, 4 cycle,
#093452, Type 0141, Trim .01, with 6 to 1
gear reducer. Recoil starter and rotary
stop switch. Governor set at 3600 ±100
RPM No load, idle speed 2000 RPM.
4 qt. (3.8 L) metal fuel tank.
Lawnaire IV Model 544881A
Honda, GX120 K1HX, 4 HP, 4 cycle,
with 6 to 1 gear reducer.
Recoil start and rotating on/off switch.
Governor set at 3600 RPM. No load,
idle speed 1400 ±100 RPM.
0.66 gal. (2.5L) metal fuel tank.
Clutch Belt tightener type – controlled
from handle.
Chassis Welded steel construction.
Drive Primary: V belt w/ idler clutch.
Secondary: #40 sealed roller chain to tine
assembly.
Transport: #40 sealed roller chain
to water tank.
Axles 5/8″(16 mm) diameter with
needle bearings.
Lubrication Pressure lubrication fittings.
Reduction Speed reduction to aerating tine
wheel 8.75 to 1.
Speed Transport: 190 f.p.m. (58 m.p.m.)
Aerating: 225 f.p.m. (69 m.p.m.)
Wheels One water tank front 11″(279 mm)
diameter, 6.6 gal. (25 L) capacity
maximum.
2 semi–pneumatic rear 8 x 1.75
with sealed ball bearings.
Tines 3/4″(19 mm) coring tines, formed
from 0.080″thick chrome–
molybdenum alloy steel, hardened
for long life. 30 tines per unit.
Aerating
Width 19″(483 mm)
Aerating
Depth 2 3/4″(70 mm) maximum
Aerating
Pattern 3 3/4 x 7″(95 x 178 mm) on center
Controls Two levers, clutch/throttle and
transport lever on handle.
Net Weight 188 lbs. (85.2 Kg) dry, w/o weight.
224 lbs. (101.5 Kg) dry, with weight.
274 lbs. (124.1 Kg) with water tank full
and weight installed.
Dimensions Width 28″(813 mm); height in
aerating position 38″(965 mm);
height in transport position 47″
(1,194 mm); length 48″(1,219 mm).

2
SET–UP
WARNING
!
•To prevent possible injury to yourself or others,
stay clear when cutting banding. Banding is
under tension and can snap back when cut.
1. Cut banding and remove hardware bag, handle
assembly and center support from pallet.
2. Attach left side of handle assembly to aerator
(curved portion of handle pointing up) using two
3/8–16 x 3/4″screws and lockwashers. Do not
tighten hardware at this time.
3. Be sure square washer on the tine axle is in proper
position (as shown in Figure 2) before installing right
side hardware. Attach right side of handle to aerator
using one 3/8–16 x 3/4″screw and lockwasher in
lower hole, and one 3/8–16 x 1 1/4″screw and lock-
washer in remaining hole. Attach tine cover to 1 1/4″
screw with flatwasher and locknut. Do not tighten
hardware at this time.
4197
5328
2
1
3
Figure 2. Handle Attachment
1. Tine Axle Square Washer
2. Handle Assembly
3. Mounting Hardware
4. Position center support (as shown in Figure 3) and
attach to bracket on handle using two 3/8–16 x 3/4″
screws with locknuts. Attach the opposite end of the
center support with two 3/8–16 x 3/4″screws and
locknuts to the bottom side of the tab on aerator
frame located just below the fuel tank.
Figure 3. Handle Assembly
1. Center Support
2. Handle Bracket
3. Aerator Frame Tab
5. Secure tine cover to center support using one
5/16–18 x 1 1/2″screw, washer, lockwasher and
locknut.
Tighten all hardware installed in previous steps at
this time.
6. Attach ball end of clutch control cable to cable clamp
on bellcrank. See Figure 4.
4198
1
2
3
Figure 4. Clutch Cable Attachment
1. Clutch Control Cable
2. Cable Clamp
3. Bellcrank
7. Attach one end of spring to the clutch control handle
and the opposite end to the eye of the clutch control
cable. See Figure 5.

3
4193
1
2
3
Figure 5. Clutch Cable Attachment
1. Clutch Control Handle
2. Clutch Cable Eye
3. Spring
8. Adjust the position of the cable clamp (See Figure 4)
so that when the clutch handle is pulled back and the
idler engages the belt, the clutch spring (See
Figure 5) is extended 3/8″(10mm). Release the
clutch and make sure the belt disengages com-
pletely.
9. Unwrap throttle cable from engine. Hook cable end
into throttle lever on right side of clutch control han-
dle. Install cable clamp as shown in Figure 6, but DO
NOT tighten clamp.
5069
1
2
3
Figure 6. Throttle Cable Attachment
1. Throttle Cable
2. Cable Clamp
3. Throttle Lever
BRIGGS AND STRATTON ENGINE
10. Make sure throttle friction wing nut is loosened to
allow free movement of throttle control.
Remote adjustment throttle control.
Loosen casing clamp screw on control plate. Pull
clutch handle all the way rearward. Move casing and
wire to end of travel to move throttle control to FAST
position. Tighten casing clamp screw. See Figure 7.
THROTTLE
STOP
SCREW
THROTTLE
FRICTION
NUT
WIRE
CASING
CASING
CLAMP
SCREW
THROTTLE
CONTROL
Figure 7. Remote Throttle Control
HONDA ENGINE
Remote adjustment throttle control.
Make sure throttle lever friction nut is loosened
enough to allow free movement of throttle lever. Pull
clutch handle all the way rearward and push the
throttle cable forward until the throttle lever on the
engine is fully advanced. Tighten cable clamp
securely.
THROTTLE
LEVER
FRICTION NUT
THROTTLE
LEVER
THROTTLE
CABLE
THROTTLE
CABLE
CLAMP
Figure 8. Honda Remote Throttle Control
11. Secure all cables to the center support of the handle
using the two tie straps provided.
12. Attach height adjustment tubes to height adjustment
links. A nylon bearing is taped into the lower end of
each tube. Secure both sides with shoulder bolts,
lockwashers and nuts. See Figure 9.

4
5328
2
1
Figure 9. Height Adjustment Tube Attachment
1. Height Adjustment Tube
2. Height Adjustment Link
13. Cut banding securing aerator to pallet. Pull up on
height control handle to raise aerator to the transport
position. Carefully remove aerator from pallet.
CONTROLS
Height Control Handle: Controls transport wheels.
Pushing down on handle will lower tines. Pulling handle
up will raise tines. See Figure 10.
Clutch Control Handle: Engages belt tightener clutch
and controls engine throttle. Pulling back on handle
engages clutch while increasing engine speed. Handle is
spring loaded, by releasing handle, the clutch is disen-
gaged, and engine speed is reduced. See Figure 10.
WARNING
!
•Releasing the clutch on an incline will cause
freewheeling which will allow unit to roll back
down the incline.
5329
1
2
Figure 10. Handle Controls
1. Height Control Handle
2. Clutch Control Handle
NOTICE
•The Lawnaire IV is available with either a 3.5 HP
Briggs & Stratton engine or a 4 HP Honda engine.
Briggs & Stratton Engine Controls: The engine is
equipped with an On/Off control, a choke control and fuel
shut–off valve. On/Off control must be in the “ON” posi-
tion for the engine to be started. Turning the On/Off con-
trol to the “OFF” position will stop the engine. Using the
choke control will help start a cold engine. After engine
starts, adjust choke for best running results. Once engine
warms, the choke should not be needed. Refer to
Figure 11.
5070
13
5071
2
Figure 11. Briggs & Stratton Engine Controls
1. Choke Control
2. On/Off Control
3. Fuel Shut–off valve
Honda Engine Controls: The engine is equipped with a
Choke, Fuel Valve and On/Off switch. Fuel Valve, and
On/Off switch must both be in “ON” position to start
engine. Turn On/Off switch to “OFF” to stop engine.
Using the choke will help start a cold engine. After engine
starts, adjust choke for best running results. Once engine
warms, the choke should not be needed. Refer to
Figure 12.

5
3753
1
23
Figure 12. Honda Engine Controls
1. Choke
2. Fuel Valve
3. On/Off Switch
NOTICE
•The Honda engine is equipped with a low oil sensor
to prevent engine damage. When it senses a low oil
condition (ie. operating on an exceptionally steep
slope) the engines shuts down. Condition must be
corrected before engine can be restarted (see
engine operator’s manual for more information).
OPERATION
Pre–Operation Check
Visually check all moving parts and all fasteners, if loose
or broken, tighten or replace. Check for broken or bent
tines, replace if necessary.
Lubricate all fittings after every four hours of aerating,
using a pressurized gun with a standard lithium base
lubricant. Wipe off fittings before and after lubricating.
Check engine crankcase and gear reduction case oil lev-
els with engine resting in a level position. Add oil if neces-
sary.
Follow the recommendations of the engine manufacturer
for the correct type and amount of oil. Fill the fuel tank
according to engine manufacturer specifications.
WARNING
!
•Gasoline is extremely flammable and highly
explosive under certain conditions. Always stop
the engine and do not smoke or allow open
flames or sparks when refueling. BE SURE to
reinstall fuel cap after refueling.
•NEVER start or run the engine inside where
exhaust fumes can collect. Carbon monoxide
present in the exhaust is an odorless and deadly
gas.
•DO NOT operate equipment without shields in
place. DO NOT make adjustments or perform any
maintenance while the engine is running.
•Before operating, check the area and remove any
object which may present a safety hazard or
damage the equipment.
•This unit is not designed to be used on steep
slopes. To prevent injury and/or damage to
equipment use extreme caution when operating
near terraces or hilly terrain. Travel up and down
slopes at a 45°angle rather than across, to pre-
vent unit from tipping over. DO NOT release
clutch handle on a slope, this will cause free
wheeling, allowing unit to roll back down the
slope.
NOTICE
•Never cross hard objects or surfaces (sidewalks,
driveways, stepping stones, etc.) with tines in down
position.
•Always drain water tank for winter storage. Freezing
water may rupture the tank.
Aerating
For best performance and maximum tine penetration
lawn should be thoroughly watered the day before aera-
tion.
Rotate water tank on front of unit until filler plug is posi-
tioned at the top. Remove plug, fill tank with water and
replace the plug. Plug is located on left side of unit. See
Figure 13.
4192
1
Figure 13. Tank Filler Location
1. Tank Filler Plug

6
Move On/Off lever to “ON” position, pull recoil starter and
choke as required to start engine.
Make sure the transport wheels are in the down position
(tines not touching ground), slowly pull back on clutch
handle and transport aerator to work area.
Upon reaching the work area, release clutch control han-
dle, push down on height control handle lowering aerat-
ing tines to the turf.
Pull back slowly on the clutch handle to start aerating.
For maximum tine penetration into turf, apply downward
pressure on handle.
At the end of aerating run, release clutch handle and lift
up on height control handle. Apply just enough pressure
on clutch handle to aid in turning aerator around and
repeat aerating pass.
When finished aerating, lift up on height control handle to
move wheels into transport position.
Drain water tank when finished with aerating.
SERVICE
WARNING
!
•When replacement parts are required, use genu-
ine RYAN parts or parts with equivalent charac-
teristics including type, strength, and material.
Failure to do so may result in product malfunc-
tion and possible injury to the operator and/or
bystanders.
•Any warning decal that becomes illegible should
be replaced immediately.
•Do not operate equipment without shields in
place. Do not make any adjustments or perform
any maintenance while the engine is running.
Thoroughly clean all tines inside and out when aerating is
completed and apply a light coat of oil to prevent rust on
tines.
Check engine and gear reduction case oil level with
engine resting in a level position.
Inspect air filter element and replace if necessary.
Wipe off lubrication fittings before and after each lubrica-
tion. Always lubricate aerator each time it is put into ser-
vice.
Keep drive belt free of oil and dirt.
Check roller chains for tightness and wear. Apply a light
coat of no. 30 oil or penetrating chain lubricant to keep
the chain clean and in proper running order.
Idler sprockets are adjustable. Loosen nut and screw
holding idler sprocket to frame then slide sprocket in slot
to desired position. Tighten hardware.
NOTICE
•Excessive roller chain tightness will shorten the life of
the bearings. Chain should have movement of 1/8″
to 1/4″(3mm to 6mm) up and down at center point
between both sprockets.
STORAGE INSTRUCTIONS
WARNING
!
•To prevent possible explosion or ignition of
vaporized fuel, do not store equipment with fuel
in tank or carburetor in enclosure with open
flame. (Example: Furnace or water heater pilot
light).
Before the equipment is put into storage for any period
exceeding 30 days, the following steps should be taken:
1. Drain all fuel from fuel tanks and fuel lines.
2. Start engine and run until all fuel is used from carbu-
retor float bowl.
3. While engine is still warm, drain the crankcase oil
and replace with the proper weight oil corresponding
to the season the equipment will next be used.
4. Remove the spark plug and squirt a small quantity of
engine oil into the cylinder. Turn the engine over a
few times to distribute that oil.
5. Drain water tank.
6. Lubricate all lubrication fittings.
To put equipment into operation after an extended stor-
age:
1. Check for loose parts and tighten if necessary.
2. Check for cracked or broken tines and replace.
3. Fill fuel tank.
4. Check engine and gear reduction case oil levels
(with engine in a level position).
5. Start engine.
6. Check for fuel leaks.
7. Check clutch lever operation to make sure unit stops
when lever is released.

7
TOUCH UP PAINT
Ransomes Green (medium green)
16 oz. (0.5L) spray order no. 838140. . . . . . . . . . . . . .
1 qt. (0.95L) can order no. 838141. . . . . . . . . . . . . . . .
Safety Yellow
16 oz. (0.5L) spray order no. 833252. . . . . . . . . . . . . .
1 qt. (0.95L) can order no. 833251. . . . . . . . . . . . . . . .
TRANSPORTING
If tote trailer is used, weight from aerator frame bar must
be removed and locking shaft installed through aerator
frame.
Removal of weight bar from unit and draining water tank,
will decrease the weight for easier loading on vehicle or
trailer.
Remove weight bar by turning lever to the up position and
sliding weight bar out. Take care, the bar weighs approxi-
mately 20 lbs.
5072
1
2
Figure 14
1. Lever
2. Weight
Close fuel shut off valve before transporting unit.

8
M4 M5 M6 M7 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27
N·m 2 4 7 11 18 32 58 94 144 190 260 368 470 707
ft.-lb. 1.5 3 5.2 8.2 13.5 24 43.5 70.5 108 142 195 276 353 530
N·m 3 6 10 16 25 47 83 133 196 269 366 520 664 996
ft.-lb. 2.2 4.5 7.5 12 18.8 35.2 62.2 100 147 202 275 390 498 747
N·m 3.6 7 11 20 29 58 100 159 235 323 440 628 794 1205
ft.-lb. 2.7 5.2 8.2 15 21.8 43.5 75 119 176 242 330 471 596 904
1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1 1/8
ft.-lb. 9 18 31 50 75 110 150 250 378 583 782
N·m 12 24 42 68 102 150 203 339 513 790 1060
ft.-lb. 13 28 46 75 115 165 225 370 591 893 1410
N·m 18 38 62 108 156 224 305 502 801 1211 1912
ft.-lb. 24 40
N·m 33 54
TORQUE SPECIFICATIONS
HEX HEAD CAP SCREWS
* Grade 5 marking – Minimum commercial quality (Lower quality not recommended).
U.S. Standard Hardware
Grade Shank Size (Diameter in inches, fine or coarse thread)
SAE
grade
5 *
SAE
grade
8 **
Flangelock
Screw w/
Flangelock
Nut
The torque values shown should be used as a general guideline when specific torque values are not given.
** Grade 8 marking –
Grade Shank Size (Diameter in millimeters, fine or coarse thread)
Grade
8.8*
Grade
10.9**
Grade
12.9 ***
Metric Standard Hardware
* Grade 8.8 marking – ** Grade 10.9 marking – *** Grade 12.9 marking –
8.8 10.9 12.9

9
NOTES

10
AERATING AND DRIVE GROUP
◊
◊◊

11
AERATING AND DRIVE GROUP
1◊540291 Chain, #40 sealed roller 1. . . . . . . .
* 522122 •Link, connector 1. . . . . . . . . . . . . . .
2 547889 Chain, #40 sealed roller 1. . . . . . . .
* 522122 •Link, connector 1. . . . . . . . . . . . . . .
3 547920 Tank assembly, complete 1. . . . . . .
4 306932 •Nut, 5/16–18 12. . . . . . . . . . . . . . .
5 522414 •Tank, water 1. . . . . . . . . . . . . . . . . .
6 522480 •Gasket, 4 1/2″diameter 1. . . . . . . .
7 522481 •Gasket, 3″diameter 1. . . . . . . . . . .
8 522586 •Plate, cap, 3″diameter 1. . . . . . . .
9 522674 •Sprocket, tank 1. . . . . . . . . . . . . . . .
10 523912 •Fitting, lubrication 1. . . . . . . . . . . . .
11 545887 •Ring, split 2. . . . . . . . . . . . . . . . . . . .
12 547855 •Kit, needle bearing 1. . . . . . . . . . . .
13 303269 ••Lockwasher, 7/16 2. . . . . . . . . . . .
14 304364 ••Nut, lock 7/16–14 2. . . . . . . . . . . .
15 515891 ••Spacer, large As Req’d. . . . . . . . .
16 523241 ••Seal, v–ring 2. . . . . . . . . . . . . . . . .
17 523829 ••Washer, thrust 2. . . . . . . . . . . . . . .
18 523832 ••Bearing, needle 2. . . . . . . . . . . . . .
19 523885 ••Bushing 2. . . . . . . . . . . . . . . . . . . . .
20 524807 ••Washer, square 2. . . . . . . . . . . . . .
21 523939 ••Shim, small As Req’d. . . . . . . . . .
22 523947 ••Shaft, axle 1. . . . . . . . . . . . . . . . . .
23 548478 ••Shim, large As Req’d. . . . . . . . . . .
24 547873 •Tube, drive 1. . . . . . . . . . . . . . . . . . .
25 548224 •Fitting, lubrication 1. . . . . . . . . . . . .
26 548604 •Screw, flangelock, 5/16–18x3/4 3. . .
27 548911 •Nut, flangelock 5/16–18 3. . . . . . . .
28 821274 •Plug, drain 1. . . . . . . . . . . . . . . . . . .
29 547921 Tine wheel assembly, complete 1. .
30 306501 •Screw, 5/16–18 x 1 1/2 3. . . . . . . .
31 521582 •Sprocket 1. . . . . . . . . . . . . . . . . . . . .
32 521588 •Bushing 3. . . . . . . . . . . . . . . . . . . . .
33 522229 •Sprocket, drive 1. . . . . . . . . . . . . . .
34 522361 •Tine, 3/4″(19 mm) 30. . . . . . . . . .
35 547855 •Kit, needle bearing 1. . . . . . . . . . . .
36 303269 ••Lockwasher, 7/16 2. . . . . . . . . . . .
37 304364 ••Nut, lock 7/16–14 2. . . . . . . . . . . .
38 515891 ••Spacer, large As Req’d. . . . . . . . .
39 523241 ••Seal, v–ring 2. . . . . . . . . . . . . . . . .
40 523829 ••Washer, thrust 2. . . . . . . . . . . . . . .
41 523832 ••Bearing, needle 2. . . . . . . . . . . . . .
42 523885 ••Bushing 2. . . . . . . . . . . . . . . . . . . . .
43 523890 ••Washer, square 2. . . . . . . . . . . . . .
44 523939 ••Shim, small As Req’d. . . . . . . . . .
45 523947 ••Shaft, axle 1. . . . . . . . . . . . . . . . . .
46 548478 ••Shim, large As Req’d. . . . . . . . . . .
47 547871 •Wheel, tine 1. . . . . . . . . . . . . . . . . . .
48 548224 •Fitting, lube 2. . . . . . . . . . . . . . . . . .
49 548604 •Screw, flangelock, 5/16–18 x 3/4 3. .
50 548911 •Nut, flangelock 5/16–18 3. . . . . . . .
51 800290 •Nut, lock 5/16–18 63. . . . . . . . . . .
52 800606 •Bolt, carriage, 5/16–18 x 1 1/2 60. .
53◊◊ 547888 Chain, #40 sealed (74 links with
connector) 1. . . . . . . . . . . . . . . . . . . .
Ref.
No. Part No. Description No. Req’d No. Req’d
Description
Part
No.
Ref.
No.
•INDENTED PART NAMES INDICATE THESE PARTS ARE INCLUDED IN PRECEDING ASSEMBLY.
* Not illustrated.
◊For units produced after 10-09-95.
◊◊ For units produced prior to 10-09-95.

12
CHASSIS
Obtain Engine
Locally
◊
◊◊
57

13
CHASSIS
Ref.
No. Part No. Description No. Req’d No. Req’d
Description
Part
No.
Ref.
No.
1 103867 Washer, 5/16 4. . . . . . . . . . . . . . . . . .
2 120177 Lockwasher, 3/8 2. . . . . . . . . . . . . . .
3 131794 Screw, 3/8–16 x 2 2. . . . . . . . . . . . . .
4 306325 Lockwasher, 5/16 10. . . . . . . . . . . .
5 306367 Key, #9 woodruff 2. . . . . . . . . . . . . . .
6 306375 Nut, 1/4–20 1. . . . . . . . . . . . . . . . . . .
7 306396 Lockwasher, 1/4 3. . . . . . . . . . . . . . .
8 306405 Washer, 3/8 14. . . . . . . . . . . . . . . . .
9 306414 Screw, 3/8–16 x 1 1. . . . . . . . . . . . . .
10 306418 Screw, 1/4–20 x 1 1/8 2. . . . . . . . . .
11 300646 Screw, 1/4–20 x 3/4 2. . . . . . . . . . . .
12 306501 Screw, 5/16–18 x 1 1/2 4. . . . . . . . .
13 306322 Screw, 5/16–18 x 7/8 2. . . . . . . . . . .
14 306562 Nut, 3/8–16 2. . . . . . . . . . . . . . . . . . .
15 306932 Nut, 5/16–18 10. . . . . . . . . . . . . . . .
16 103867 Washer, 11/32 1. . . . . . . . . . . . . . . . .
17 521585 Shaft, jack 1. . . . . . . . . . . . . . . . . . . .
18 521589 Bushing 1. . . . . . . . . . . . . . . . . . . . . .
19 521608 Pulley, engine 1. . . . . . . . . . . . . . . . .
20 521609 Pulley 1. . . . . . . . . . . . . . . . . . . . . . . .
21 521613 Belt, 17/32 x 9/32 x 47″O.D. 1. . . .
22 522355 Latch, weight 1. . . . . . . . . . . . . . . . . .
23 523352 Guard, chain (left) 1. . . . . . . . . . . . . .
24 523359 Guard, chain (right) 1. . . . . . . . . . . .
25◊841261 Sprocket (16 teeth) 2. . . . . . . . . . . . .
26 545797 Shield 1. . . . . . . . . . . . . . . . . . . . . . . .
27 521787 •Decal, warning 1. . . . . . . . . . . . . . .
28 522131 •Decal, operating instructions 1. . .
29 545844 Weight 1. . . . . . . . . . . . . . . . . . . . . . .
30 545904 Stop assembly 1. . . . . . . . . . . . . . . .
31 306409 •Screw, 1/4–20 x 7/8 1. . . . . . . . . . .
32 306488 •Lockwasher, 1/4 1. . . . . . . . . . . . . .
33 522516 •Mount, isolation 1. . . . . . . . . . . . . .
34 548175 •Washer, 1/4 1. . . . . . . . . . . . . . . . . .
35 547676 Frame, 1. . . . . . . . . . . . . . . . . . . . . . .
36 548052 Nut, lock 3/8–16 1. . . . . . . . . . . . . . .
37 548101 Bearing, ball w/collar 2. . . . . . . . . . .
38 521856 •Bearing 1. . . . . . . . . . . . . . . . . . . . . .
39 521857 •Collar, locking 1. . . . . . . . . . . . . . . .
40 548201 Screw, set 5/16–18 1. . . . . . . . . . . . .
41 548366 Key 1. . . . . . . . . . . . . . . . . . . . . . . . . .
42 548960 Sprocket, idler 2. . . . . . . . . . . . . . . . .
43 548962 Flange, bearing 4. . . . . . . . . . . . . . . .
44 800557 Bolt, carriage 5/16–18 x 3/4 4. . . . .
45 840697 Decal, warning 1. . . . . . . . . . . . . . . .
46 548164 Washer, 3/8 5. . . . . . . . . . . . . . . . . . .
47 869081 Decal, danger 2. . . . . . . . . . . . . . . . .
48 838494 Decal, stripe, 20’(6.1M) As Req’d..
49 524281 Decal, Ryan 1. . . . . . . . . . . . . . . . . . .
50 524362 Decal, Lawnaire, IV 1. . . . . . . . . . . .
51 540235 Tube, exhaust 1. . . . . . . . . . . . . . . . .
52 800149 Screw, #10–16 x 3/8, tapping 1. . . .
53 306834 Screw, 3/8–16 x 3/4 1. . . . . . . . . . . .
54 548804 Nut, 3/8–16 2. . . . . . . . . . . . . . . . . . .
55 831004 Weatherstrip, 25’ (7.6M) As Req’d.
56◊◊ 523603 Sprocket (12 teeth) 1. . . . . . . . . . . . .
57 844847 Decal, TEXTRON 2. . . . . . . . . . . . . .
•INDENTED PART NAMES INDICATE THESE PARTS ARE INCLUDED IN PRECEDING ASSEMBLY.
◊For units produced after 10-09-95.
◊◊ For units produced prior to 10-09-95.

14
CONTROLS AND HANDLE GROUP

15
CONTROLS AND HANDLE GROUP
1 103867 Washer, 5/16 3. . . . . . . . . . . . . . . . . .
2 111898 Clamp 1. . . . . . . . . . . . . . . . . . . . . . . .
3 120052 Lockwasher, #10 1. . . . . . . . . . . . . . .
4 120177 Lockwasher, 3/8 4. . . . . . . . . . . . . . .
5 306325 Lockwasher, 5/16 2. . . . . . . . . . . . . .
6 306328 Pin, cotter 3/32 x 3/4 1. . . . . . . . . . .
7 306405 Washer, 3/8 1. . . . . . . . . . . . . . . . . . .
8 306409 Screw, 1/4–20 x 7/8 2. . . . . . . . . . . .
9 306322 Screw, 5/16–18 x 7/8 1. . . . . . . . . . .
10 306501 Screw, 5/16–18 x 1 1/2 1. . . . . . . . .
11 306514 Screw, #10–24 x 1/2 1. . . . . . . . . . .
12 306531 Nut, #10–24 1. . . . . . . . . . . . . . . . . . .
13 306834 Screw, 3/8–16 x 3/4 6. . . . . . . . . . . .
14 306835 Screw, 3/8–16 x 1 1/4 2. . . . . . . . . .
15 306932 Nut, 5/16–18 1. . . . . . . . . . . . . . . . . .
16 308090 Washer, 1/4 4. . . . . . . . . . . . . . . . . . .
17 548157 Washer, 33/64 3. . . . . . . . . . . . . . . . .
18 521712 Decal, operating 1. . . . . . . . . . . . . . .
19 523000 Lever, throttle 1. . . . . . . . . . . . . . . . .
20 523139 Grip, handle 2. . . . . . . . . . . . . . . . . . .
21 523363 Bushing, snap 2. . . . . . . . . . . . . . . . .
22 524808 Clamp, cable 1. . . . . . . . . . . . . . . . . .
23 523898 Spring 1. . . . . . . . . . . . . . . . . . . . . . . .
24 547445 Cable, clutch 1. . . . . . . . . . . . . . . . . .
25 547646 Handle, clutch 1. . . . . . . . . . . . . . . . .
26 540311 Handle, aerator 1. . . . . . . . . . . . . . . .
27 547735 Cable, throttle (Honda) 1. . . . . . . . .
28 547854 Bellcrank 1. . . . . . . . . . . . . . . . . . . . .
29 548225 Fitting, lubrication 1. . . . . . . . . . . . . .
30 548804 Nut, flangelock 3/8–16 6. . . . . . . . . .
31 548942 Pulley, idler 1. . . . . . . . . . . . . . . . . . .
32 551094 Screw, 3/8–16 x 1 3/4 1. . . . . . . . . .
33 602937 Spring 1. . . . . . . . . . . . . . . . . . . . . . . .
34 800059 Nut, lock 1/4–20 2. . . . . . . . . . . . . . .
35 800290 Nut, lock 5/16–18 1. . . . . . . . . . . . . .
36 800292 Nut, 3/8–16 1. . . . . . . . . . . . . . . . . . .
37 800385 Screw, flangelock 3/8–16 x 3/4 1. .
38 817019 Bushing 2. . . . . . . . . . . . . . . . . . . . . .
39 540218 Cable, throttle (B&S) 1. . . . . . . . . . .
40 320107 •Tie, plastic 2. . . . . . . . . . . . . . . . . . .
41 524467 Cover, tine 1. . . . . . . . . . . . . . . . . . . .
42 515755 Clip 1. . . . . . . . . . . . . . . . . . . . . . . . . .
43 300646 Screw, 1/4–20 x 3/4 1. . . . . . . . . . . .
44 524281 Decal, RYAN 1. . . . . . . . . . . . . . . . . .
45 838494 Decal, stripe, 20’(6.1M) As Req’d..
46 524476 Support, center 1. . . . . . . . . . . . . . . .
Ref.
No. Part No. Description No. Req’d No. Req’d
Description
Part
No.
Ref.
No.
•INDENTED PART NAMES INDICATE THESE PARTS ARE INCLUDED IN PRECEDING ASSEMBLY.

16
HEIGHT ADJUSTER & TRANSPORT FRAME
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31 28
2

17
HEIGHT ADJUSTER & TRANSPORT FRAME
1 120177 Lockwasher, 3/8 2. . . . . . . . . . . . . . .
2 304636 Pin, cotter 1/8 x 1 2. . . . . . . . . . . . .
3 306325 Lockwasher, 5/16 2. . . . . . . . . . . . . .
4 306414 Screw, 3/8–16 x 1 2. . . . . . . . . . . . . .
5 306562 Nut, 3/8–16 2. . . . . . . . . . . . . . . . . . .
6 306835 Screw, 3/8–16 x 1 1/4 2. . . . . . . . . .
7 306932 Nut, 5/16–18 2. . . . . . . . . . . . . . . . . .
8 306956 Pin, cotter 1/8 x 3/4 2. . . . . . . . . . . .
9 306981 Washer, 3/8 4. . . . . . . . . . . . . . . . . . .
10 548157 Washer, 33/64 3. . . . . . . . . . . . . . . . .
11 516634 Pin, clevis 2. . . . . . . . . . . . . . . . . . . . .
12 518438 Bushing 2. . . . . . . . . . . . . . . . . . . . . .
13 524633 Screw, shoulder, 5/16–18 1. . . . . . .
14 524638 Tube, control 2. . . . . . . . . . . . . . . . . .
15 524649 Handle, height adjustment 1. . . . . .
16 524643 Bearing, split 4. . . . . . . . . . . . . . . . . .
17 545931 Wheel 2. . . . . . . . . . . . . . . . . . . . . . . .
18 547675 Frame, transport 1. . . . . . . . . . . . . . .
19 522440 •Spacer 2. . . . . . . . . . . . . . . . . . . . . .
20 548804 •Nut, 3/8–16 flangelock 4. . . . . . . . .
21 800385 •Screw, flangelock, 3/8–16 x 3/4 4. . .
22 547707 Link Kit 1. . . . . . . . . . . . . . . . . . . . . . .
23 521679 •Bushing 2. . . . . . . . . . . . . . . . . . . . .
24 522343 •Link, height adjustment 2. . . . . . . .
25 523366 •Spring 2. . . . . . . . . . . . . . . . . . . . . . .
26 523423 •Link, height adjustment 2. . . . . . . .
27 548165 Washer, 21/32 2. . . . . . . . . . . . . . . . .
28 604174 Washer, 3/8 4. . . . . . . . . . . . . . . . . . .
29 800292 Nut, lock 3/8–16 2. . . . . . . . . . . . . . .
30 830165 Bushing 2. . . . . . . . . . . . . . . . . . . . . .
31 548164 Washer, 3/8 2. . . . . . . . . . . . . . . . . . .
Ref.
No. Part No. Description No. Req’d No. Req’d
Description
Part
No.
Ref.
No.
•INDENTED PART NAMES INDICATE THESE PARTS ARE INCLUDED IN PRECEDING ASSEMBLY.

18