Parts for 21D65M1066 — MTD
We found 58 parts confirmed to fit the MTD 21D65M1066.
Same parts list as 21D64M1066 (MTD). 21D65M1066 shares an identical confirmed parts list with 21D64M1066 (MTD). That page is the canonical version of this parts list — use it if you want the primary reference, or stay here since the list below is exactly the same for 21D65M1066.
Compatibility table
Prices shown are an informational reference range only, not an offer or an Amazon price — RepairKitHub does not sell parts directly. Each part links to an Amazon search so you can compare current listings yourself.
Common failure areas on this model
The confirmed parts above group into a handful of failure areas. Here is what each points to and how to check it before you order anything.
Drive system (belts, pulleys, motors)
Symptom: A drum or tub that won't turn, a burning-rubber smell, or a loud thump or squeal during a cycle.
Check: With power off, turn the drum or tub by hand -- resistance or grinding points to the motor or a bearing, and a cracked, glazed, or snapped belt is visible once the cabinet is open.
Parts in this group on 21D-65M1066: 78604343 (Idler Bracket), 75604198A (Tiller Engine Pulley), 75604355 (Tiller Transmission Pulley), 78604312 (Idler Bracket), 1916658 (Reverse Belt), 1916657 (Belt), 68404168 (Tiller Idler Pulley), 95404091 (Belt-v Rev Drv 3), 95404090 (Tiller Forward Drive Belt), 7560625 (MTD Lawn Mower Roller Wheel).
Storage, trim and cosmetic hardware
Symptom: A cracked shelf, broken door bin, worn hinge, or missing trim piece -- cosmetic and storage wear rather than a functional breakdown.
Check: Match the physical dimensions and mounting tabs of the old part before ordering; these pieces are often model-specific even between visually similar models.
Parts in this group on 21D-65M1066: 78604364 (RH TAIL BRACKET), 01000512 (Hex Cap Screw), 1509098 (Hex Screw), 1908672 (Hex Screw), 7103037 (Hex Screw), GWWO2050613 (Hex Screw), 91904202B (Housing Transmission), 1120513 (Toro Screw-Hh), 71004605B (Craftsman Lawn Tractor Screw), 7101238 (Lawn & Garden Equipment Screw), 73804320 (Lawn & Garden Equipment Shoulder Screw), 94104299 (Lawn Tractor Mandrel Shaft Spacer), GW1100086 (Screw-hh 3/8), 7380440 (Spacer Shield), 75005349 (Spacer-round), 786040980638 (Troy-Bilt Bracket:Supt), 78604346 (Troy-Bilt Bracket-Idle), 73804425 (Lawn & Garden Equipment Shoulder Screw), 7100347 (MTD Lawn & Garden Equipment Screw, 3/8-16 x 1-3/4-in), 73204276A (MTD Lawn Tractor Spring), 72004072A (Yard Machines Lawn Mower Handle Knob), 7100599 (MTD Lawn Tractor Screw).
General hardware and mounting parts
Symptom: A small mechanical or mounting part has failed, cracked, or gone missing.
Check: Compare the physical shape and mounting points to the original piece, and confirm the exact part number against your model plate before ordering.
Parts in this group on 21D-65M1066: 75306042A (Service Kit), 63404453 (Tiller Wheel Assembly, 11 x 4-in), 93404453 (Tiller Wheel Assembly, 11 x 4-in), 7100170 (Lawn & Garden Equipment Bolt), 94104298 (Lawn Tractor Mandrel Bearing), 73104735 (Hex Grip Brake), 686041354044 (Kmart Craftsmn Red), 92004173 (MTD Grip), 72104271 (Plug), 94604413A (Tiller Forward Drive Control Cable), 7160204 (Tiller Retainer Ring), 72104232 (Tiller Tine Shaft Oil Seal), 91704381 (Tiller Worm Gear), 1120921 (Toro Flange Washer), 7413114 (Troy-Bilt Bearing-Ball), 7103288 (ENGINE-FOR COMPONENTS SEE MOD 143.171122 IN D/9 INDEX), 94604414A (MTD CABLE-REVERS), 742042275083 (TINE-BOLO 10), 686040660638 (Troy-Bilt Holder Asm:T), 742042270637 (Tiller Bolo Tine, Left), 91704380 (Tiller Tine Input Sprocket Assembly), 95112119A (Carburetor Kit-maj), 9360119 (MTD Lawn & Garden Equipment Lock Washer), 7100514 (Yard Machines Lawn Tractor Bolt), 71204063 (Yard Machines Lawn & Garden Equipment Lock Nut, 5/16-18), 71204065 (MTD Yard Machines Lawn Tractor Flange Nut).
Before you buy
Match 21D65M1066 exactly against the model and serial plate on the appliance itself before ordering anything — a single mismatched character can point to a different production run with different parts. Then check the part number printed or stamped on the part you are replacing against the part numbers in the table above; the printed number is the most reliable way to confirm fitment when a model has gone through multiple production runs. RepairKitHub does not sell parts directly — every part link above routes to an Amazon search for that part number so you can compare current listings and sellers yourself.
How to confirm this is your model
Check inside a door opening, on a back or side panel, or behind a removable panel or drawer for a label printed with the model and serial number. Match every character exactly, including letters and dashes at the end — appliance model numbers often have similar prefixes but different suffixes for different production runs.
Still not sure?
Use the model lookup tool to search by model or part number, or start from the symptom your appliance is showing.