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Walker MR21 Mower

Walker MR21 Parts: Idlers & Pulleys

Walker MR21 Mower
Serial numbers covered: 178455 – 189148. Walker changes parts between serial ranges, so check the serial plate on your machine and look up your exact serial number before ordering.
353 OEM part numbers18 in stock to order onlineFree shipping $125+

Shop MR21 Parts: Idlers & Pulleys

Part Type: Idlers & Pulleys
All part types 18Blades 3Spark Plugs & Ignition 1Tires & Wheels 1Idlers & Pulleys 2Spindles 1Carburetor & Fuel 1Electrical & Switches 4Hardware 5
Brand
Walker 14Rotary 3
Clear all
Genuine Walker OEM part

Idler Pulley (2-3/4)
Genuine Walker OEM part

V-Groove Idler (4") S84&ON

Walker MR21 OEM Parts List by Type

Every part number on the Walker MR21 parts list. Part numbers with a Shop button are in stock online; for any other number, search it at the top of the page or ask us and we'll order it.

MR21 Blades
Part #DescriptionQtySerials
1731Blade Drive Belt, MR 481allShop
7705-31LH/RH Blade, 21-3/8" (RH Rotation)2allShop
7705-29LH/RH Blade, 24-3/8" (RH Rotation)2allShop
1731-2Blade Drive Belt1all
1731-1Blade Drive Belt, MR 421all
8600-56Blade Mounting Torque Carrier Frame1all
8052-5Blade Spindle2all
8600-28Danger, Rotating Blades Deck Housing (one on each end)2all
7705-42LH/Center/RH Blade, 18.6673all
7705-36LH/RH Blade, 21-3/8" (Mulch)2all
7705-37LH/RH Blade, 24-3/8" (Mulch)2all
MR21 Belts
Part #DescriptionQtySerials
1620-2Belt Drive Cover1all
1250Drive Belt1all
MR21 Filters
Part #DescriptionQtySerials
5020-3Fuel Filter1all
5020-2Fuel Filter, In Tank1all
MR21 Tires & Wheels
Part #DescriptionQtySerials
F0151/2-20 Wheel Lug Nut8all
1770Caster Wheel Fork2all
5715-20Caster Wheel, Hollowmatic (8 x 3.00-4)2all
5075-2LP Tire (18 x 8.50-10) *1all
5075-3LP Wheel & Tire Assembly (18 x 8.50-10)2all
5075-5LP Wheel (10 x 7) *1all
6715-2Roller Wheel2all
5162-12Roller Wheel (5" Poly)2all
8490Roller Wheel Axle Bolt2all
6715-3Roller Wheel Bearing4all
5036Tail Wheel & Hub (6 x 4.5) * * Service Part Only1all
5035Tail Wheel & Tire Assembly (13 x 6.50-6)1all
5420-3Tail Wheel Fork1all
5035-1Tail Wheel Tire (13 x 6.50-6) *1all
MR21 Idlers & Pulleys
Part #DescriptionQtySerials
5245-2Idler Pulley (2-3/4)3allShop
5247-2V-Groove Idler (4")2allShop
6240-24Engine Pulley (3-1/2/A)1all
1300-6Ground Drive Idler Arm1all
1701-19Idler Arm (Includes Items # 26 & 27)1all
1703-9Idler Arm (Includes Items # 26 & 28)1all
1702-9Idler Arm, DS54-R1all
1300-15Idler Mount Plate1all
7245-2Idler Pulley1all
5245Idler Pulley (3")1all
4245Idler Pulley (3/A)1all
1701-16Idler Stop1all
1300-21Twin Idler Mount, LH1all
1300-20Twin Idler Mount, RH1all
MR21 Spindles
Part #DescriptionQtySerials
6240-26Spindle Pulley (5.25)3all
6240-25Spindle Pulley (6")2all
6240-23Spindle Pulley (6-3/4/B)2all
MR21 Bearings & Bushings
Part #DescriptionQtySerials
5270-1Ball Bearing2all
8769-12Bearing Cup (1/2 ID)2all
5037-1Bearing, Tail Wheel2all
5083-1Bushing, Rubber1all
5740-4Deck Pin Bushing4all
7201-3Fiberglide Bearing2all
7201-2Fiberglide Bearing 1/2"2all
7201-4Inner Race (1-1/2)1all
5683-2Pivot Bearing (.750 x 1.0)4all
5103-2Pivot Bushing (5/16 ID) 320all
9704-3Pivot Rod Bushing, Plastic2all
5463-5Steering Arm Pivot Bushing (SS)2all
MR21 Cables
Part #DescriptionQtySerials
7409-1Brake Control Cable, LH (31")1all
7410-1Brake Control Cable, RH (36.5")1all
5832Cable Clamp (1/2) .203 Hole1all
6833Cable Clamp (9/16 x #10)5all
5975-1Cable Tie (18# x 3-3/4")4all
1108-1Throttle Cable (45")1all
5108-5Throttle Control Knob, Red1all
MR21 Batteries & Chargers
Part #DescriptionQtySerials
1910Battery Mount Plate1all
MR21 Seats
Part #DescriptionQtySerials
1383-1Seat Latch1all
5103-11Seat Pan 129all
MR21 Carburetor & Fuel
Part #DescriptionQtySerials
5082-42-1/4 Rachet Fuel Cap (EPA)1all
5108-20Control Lever, Throttle1all
6045-1Fuel Tank Gauge1all
6045-10Fuel Tank, 3.0 Gallon1all
1046Gas Tank Mount1all
5083-7Tank Tube (8-1/2")1all
MR21 Engine Parts
Part #DescriptionQtySerials
F1231" External Snap Ring4all
F0721/4 “E” Retainer Ring2all
8600-12Caution, Engine Exhaust Engine, LH Side1all
8600-5Caution, Engine Exhaust Muffler Guard1all
5665-1Compression Spring (2-1/2)2all
5682Compression Spring (9/16 x 3/4)2all
4142-1FSC Cam1all
5855Important, Engine Cooling Engine1all
1013-6Muffler1all
1013-4Muffler Guard1all
8043-8Roll Over Valve1all
MR21 Seals & Gaskets
Part #DescriptionQtySerials
6045-2Fuel Tank Gauge Grommet1all
5977-7Roll Over Grommet (.900 x 1-1/2)1all
2212-3Seal Retainer2all
MR21 Electrical & Switches
Part #DescriptionQtySerials
5933Battery Terminal Insulation Red (+)1allShop
8990-1Hourmeter (Global)1allShop
4950PTO Switch1allShop
5942-8Safety Switch (NO), Delta Side Mount2allShop
F0661/4 x 1/4 x 3/4 Key1all
F5003/16 x 3/16 x 9/16 Key2all
5932Battery Terminal Insulation Black (-)1all
8941Circuit Breaker (30 Amp)1all
6940-21Ground Wire1all
8960-15Ignition Switch W/Keys1all
6940-18Jumper Wire1all
6940-19Jumper Wire1all
4940-11Jumper Wire1all
8960-3Key Set W/Umbrella1all
4950-11PTO Switch Spacer 1** * Replacement sensor for the integrated seat sensor.1all
6941-9Relay Switch 30/40 Amp2all
5942-20Safety Switch (NO)1all
5103-12Seat Switch 1*1all
5103-3Seat W/Switch 127all
1300-10Solenoid Guard1all
5929Starter Solenoid1all
1940Wire Harness1all
MR21 Drive & Hydraulics
Part #DescriptionQtySerials
5714-3Axle Spacer Tube2all
6715-6Axle Spacer Tube2all
5038-1Axle Spacer Tube (6-5/8)1all
1410Clutch1all
1410-2Clutch Step Washer1all
1410-1Clutch Stop1all
5086-7Hose (1/4 x 6)1all
5879-3Hose Clamp (1/2)2all
1300-5Hydro Fan Cover, LH1all
1300-2Hydro Fan Cover, RH1all
1406Parking Brake Arm1all
1406-1Parking Brake Bracket1all
1406-2Parking Brake Clevis2all
1406-3Parking Brake Knuckle1all
1212-4Transmission Control Arm2all
MR21 Handles & Controls
Part #DescriptionQtySerials
5108-21Control Bracket1all
5213-5Control Rod (17")2all
5180Edge Molding, Lever Opening2all
1170-27FSC Lever Weldment1all
5145-4Gas Spring Assembly1all
5850-5Handle Grip (1 x 1 x 3-3/4)1all
5850-2Handle Grip, Foam (5-1/2)1all
7440-5Shock Mount (1-1/4 x 3/4) 428all
7307-1Shock Mount (1.0 x .25) Double Stud4all
1451-40Steering Assembly1all
5463-4Steering Lever Actuator2all
4199-3Steering Lever Dampener Assembly2all
5453-14Steering Lever Handle, Adjustable2all
1452Steering Lever Tube W/Tab2all
4452-6Steering Pivot (1/4-20 x 1-5/8)2all
1300-12Tensioner Lever1all
6811-3Tilt Bar With Grip (20")1all
MR21 Deck & Body Parts
Part #DescriptionQtySerials
1600-3Danger, Tilt-Up Carrier Frame2allShop
1431-1Deck Support Arm, LH1allShop
F3831/4-20 x 2 Shear Bolt, Grade 21all
1709-5Backup Plate1all
1702-70Baffle1all
8600-55Belt Danger Drive Belt Guard1all
8600-57Caution, Pinch Point Carrier Frame2all
1300-1Chassis Frame1all
1660-1DS42-R Carrier Frame1all
1703-4DS42-R Deck Housing (Includes Item # 20)1all
1661-1DS48-R Carrier Frame1all
1701-18DS48-R Deck Housing (Includes Item # 7)1all
1662-3DS54-R Carrier Frame1all
1702DS54-R Deck Housing (Includes Item # 12)1all
5848-3Danger, Side Discharge Shield Side Discharge Shield1all
8600-14Danger, Tilt-Up Carrier Frame, Front1all
1431-3Deck Arm Latch, LH1all
1431-4Deck Arm Latch, RH1all
1703-1Deck Belt Cover1all
1703-14Deck Belt Cover1all
1701-1Deck Belt Cover1all
1701-14Deck Belt Cover1all
1701-15Deck Belt Cover1all
1600-4Deck Height Adjustment Footrest1all
1703-13Deck Step, DS42-R (Includes Item # 7)1all
1701-13Deck Step, DS48-R (Includes Item # 7)1all
1431-6Deck Support Arm, RH1all
1709-6Discharge Shield Frame1all
1619-1Drive Belt Guard1all
1619-2Drive Belt Guard1all
1619-3Drive Belt Guard1all
1170-1FSC Link2all
1662Footrest (Includes Items # 2 & 4)1all
4504-1Hinge (13-1/2") 130all
8600-53LH Fender Chassis, LH Side Near Seat1all
2028-5Lockout Arm, LH1all
2028-6Lockout Arm, RH1all
7307-9Pull Through Bumper6all
8600-52RH Fender Chassis, RH Side Near Seat1all
1692-55Removable Mulch Baffle1all
1692-47Removable Mulch Baffle1all
8845-1Rubber Bumper (1-1/4 x 3/4)1all
7844Rubber Bumper (1.25 x .250)1all
7845-1Rubber Bumper (1.375 x .750)2all
1709-3Rubber Shield1all
1300-13Tensioner Arm Assembly1all
1300-17Tensioner Mount Assembly1all
1661-2Tilt Up Link2all
MR21 Hardware
Part #DescriptionQtySerials
F00210-24 Keps Nut7allShop
F0123/8-16 Keps Nut2allShop
F0473/8-16 x 4-1/2 Hex Bolt2allShop
F0095/16-18 Whiz Locknut16allShop
7775-2Hitch Pin, LH (Gold) #62allShop
7775-1Hitch Pin, RH (Silver) #62allShop
F086#10 SAE Washer8all
F206#2 x 3/16 Drive Pin2all
F198.250 x .625 x .040 Washer, SS2all
F183.312 x .700 x .074 Washer2all
F241.375 x .875 x .10 Washer1all
F0481/2 SAE Washer2all
F0161/2-13 Self-Locking Nut1all
F2921/2-13 x 8-1/2 Hex Bolt, Grade 51all
F2651/2-20 x 1-1/2 Hex Bolt2all
F1851/4 Internal Star Lock Washer, SS2all
F0501/4 SAE Washer2all
F6421/4 x .042 Belleville Washer1all
F1821/4 x 5/8 x 1/8 Washer2all
F0051/4-20 ESNA Nut1all
F0191/4-20 ESNA Wing Nut1all
F5691/4-20 Flange Top Lock Nut4all
F1461/4-20 Jam Nut1all
F0041/4-20 Keps Nut17all
F1881/4-20 Self-Locking Nut4all
F3451/4-20 x .770 Knurled Bolt4all
F1791/4-20 x 1 Hex Bolt1all
F3921/4-20 x 1 Set Screw, SS Cup Point1all
F1161/4-20 x 1-1/4 Hex Bolt1all
F4261/4-20 x 1/2 Carriage Bolt1all
F0291/4-20 x 1/2 Hex Bolt10all
F1841/4-20 x 1/2 Hex Bolt, SS2all
F0321/4-20 x 3/4 Hex Bolt4all
F4771/4-20 x 5/8 Carriage Bolt2all
F0311/4-20 x 5/8 Hex Bolt2all
F6241/4-20 x 6 Carriage Bolt1all
F3901/4-20 x 7/8 Carriage Bolt1all
F6401/4-20, 7/8 Washer Free Spinning Nut4all
F6271/4-28 Nylock Jam Nut2all
F1111/8 x 3/4 Cotter Pin1all
F23210-32 Keps Nut2all
514610mm Ball Stud4all
F0513/8 SAE Washer10all
F2783/8 Split Lock Washer3all
F0593/8 Wave Spring Washer4all
F3123/8 x 3/8 Shoulder Bolt2all
F0143/8-16 ESNA Nut2all
F5703/8-16 Flange Top Lock Nut2all
F5873/8-16 Top Lock Flange Nut Grade G1all
F0133/8-16 Whiz Locknut6all
F4053/8-16 x 1-1/2 FHA Screw, SS1all
F0403/8-16 x 1-1/2 Hex Bolt2all
F6093/8-16 x 1-1/4 Button Head Cap Screw1all
F0393/8-16 x 1-1/4 Hex Bolt3all
F0413/8-16 x 1-3/4 Hex Bolt2all
F6673/8-16 x 1-5/8 Hex Bolt1all
F1083/8-16 x 2 Hex Bolt2all
F0423/8-16 x 2-1/4 Hex Bolt4all
F3933/8-16 x 3-1/4 Hex Bolt1all
F1923/8-24 Self-Locking Nut1all
F6203/8-24 x 1-1/2 Hex Bolt1all
F0495/16 SAE Washer6all
F1705/16 x 1 x 7/64 Flat Washer (Zinc Plate)2all
F0205/16-18 ESNA Nut2all
F5515/16-18 Flange Top Lock Nut5all
F1695/16-18 x 1 Carriage Bolt3all
F0935/16-18 x 1 Hex Bolt2all
F2555/16-18 x 1-1/2 Hex Bolt2all
F1315/16-18 x 1/2 Hex Bolt3all
F2755/16-18 x 2 Hex Bolt1all
F2355/16-18 x 2-1/2 Hex Bolt4all
F4385/16-18 x 2-3/4 Hex Bolt2all
F4785/16-18 x 3-1/4 Hex Bolt2all
F6235/16-18 x 3-3/4 Hex Bolt1all
F0345/16-18 x 3/4 Hex Bolt2all
F0915/16-18 x 5/8 Hex Bolt4all
F5715/16-18 x 7/8 Carriage Bolt2all
F2265/16-18 x 7/8 Hex Bolt6all
F0105/16-24 ESNA Nut2all
F0245/16-24 Jam Nut2all
F4135/16-24 x 5/16 Set Screw2all
F0555/8 SAE Washer2all
F4045/8-18 Jam Nut2all
F5066-32 Nylock Nut6all
F1947/16 x 1-1/4 x 1/8 Washer2all
F5917/16-14 Flange Top Lock Nut2all
F6257/16-14 x 2 Carriage Bolt2all
F6217/16-20 Flange Top Lock Nut2all
F6327/16-20 x 1-1/2 Hex Bolt2all
F6267/16-20 x 2-1/2 Hex Bolt Grade 81all
1692-2Baffle Retaining Clip1all
5214-4Ball Joint (5/16-24) W/O Stud2all
F407Belleville Washer 3/8 x 1.187, SS1all
4407-4Bow Tie Cotter Pin3all
8655-4Clevis Pin (5/16 x 3/4)2all
7523-3Clevis Pin W/Hole (1/4 x 1/2)1all
5450D-Clip2all
5840-3Deck Arm Washer2all
4219-1Extension Spring1all
5221-4Extension Spring (1 x 8)1all
5743-15Extension Spring (1 x 9)2all
5222Extension Spring (1/2 x 3-1/4)2all
7222Extension Spring (1/4 x 3)1all
5221Extension Spring (3/4 x 4)1all
5221-1Extension Spring (3/4 x 5)1all
5141FSC Friction Washer (1-1/2 x 3/8 x 1/16)2all
5108-10Friction Washer (.125)2all
7775-5Lock Pin (5/16 x 1-5/8)1all
F497M8 x 20 Hex Bolt4all
5267-1Retainer Collar (1") (Includes Item # F413)1all
5841Retainer Washer (3/8 x 1-1/4)2all
1701-58Retaining Tab4all
1010-3Spacer (.750 x .375 x .5625)2all
5743-16Spacer (5/16 x 1-1/2)2all
6325-2Spacer Bushing (5/16)1all
1703-12Spacer Plate1all
1701-12Spacer Plate1all
1662-1Tie Down Strap1all
1661-3Tilt Up Link Spacer2all
7364-5Torsion Spring, LH1all
7364-4Torsion Spring, RH1all
7846Washer (3/8 x 1-1/4 x 1/8)2all
F349Washer .835 ID 1.122 OD, SS1all
F637Washer .835 x .505 x .1252all
4401-4Washer 1-3/4 x 3/8 x 1/4 Thk4all
7434-1Washer 1-3/8 x 5/8-1/2 Thick4all
F665Washer 1.0 x .406 x .0621all
F552Washer 1.250 x .314 x .1252all
F517Washer 3/8 x 1-1/8 x 1/86all
5463-6Washer 5/16 x 3/4 x .2502all
5727-1Washer Shim (5/8 ID)4all
4950-10spacer was located on the out-1all
MR21 Oil & Lubricants
Part #DescriptionQtySerials
5830Grease Fitting1all
6895-103Kohler 300 Hour Oil Solenoid Guard1all
MR21 Decals
Part #DescriptionQtySerials
8821-15Decal (42") Deck Housing1all
8821-16Decal (48") Deck Housing1all
8821-32Decal (54") Deck Housing1all
1600-5Decal, Belt Routing Seat Pan, Underside1all
8600-54Decal, Ignition Switch Chassis, Front1all
8600-66Decal, Pinch Point Tensioner Mount Assembly1all
8821-28Decal, R21 Chassis, Front1all
1600-2Decal, Steering Lever Chassis, Front1all
5809-2Decal, Walker Footrest, Front1all
5800-9Decal, Walker Round (4-3/4") Chassis, LH Side1all
MR21 Other Parts
Part #DescriptionQtySerials
5847Plastic Tip1allShop
F362& F640)1all
F3501/4-20 LP Nylock2all
F3331/4-20 x 3/4 PTHMS6all
F02610-24 x 1/2 PPHMS7all
F02510-24 x 3/8 PPHMS7all
F5276-32 x 3/4 Hex Trim MS, SS2all
F5056-32 x 7/8 Hex Trim MS, SS4all
1910-1Battery Hold Down1all
5025-24Hydro-Gear EZT-2200, LH1all
5026-24Hydro-Gear EZT-2200, RH1all
7854Plastic Tip, Red1all
1300-45Rear Chassis1all
8735-10Rubber Mat (5 x 6)1all
8786-9Rubber Mat (6 x 12)2all
5747-10Rubber Mat, No-Hole (3 x 6)1all
2025-10TWHCS 5/16-24 x 1.0 (Patch)2all
4219-0093or1all
38904or equivalent)1all

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