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MTD 663 lawn tractor Parts
Here are the diagrams and repair parts for MTD 663 lawn tractor, as well as links to manuals and error code tables, if available.
Owner’s manual
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By Part
SELECT DIAGRAM
Browse Parts for 663 Riding Mowers & Tractors
Seal
Part #721-0338Replaced by #921-0338
Manufacturer substitutionThis part replaces 721-0338. Substitute parts can look different from the original.This item is not returnableIn Stock$10.9615% OFF Phone Price : $12.96
Qty
Transmission diagram
Ball Bearing
Part #741-0600Replaced by #941-0600
Manufacturer substitutionThis part replaces 741-0600. Substitute parts can look different from the original.In Stock$35.5214% OFF Phone Price : $41.52QtyShift Bracket
Part #17630AReplaced by #17630A-0637
Manufacturer substitutionThis part replaces 17630A. Substitute parts can look different from the original.In Stock$28.09QtyBrake assembly diagram
Drive Shaft
Part #711-04053Replaced by #918-04079
Manufacturer substitutionThis part replaces 711-04053. Substitute parts can look different from the original.In Stock$133.248% OFF Phone Price : $145.24QtySpacer
Part #750-0932AReplaced by #950-0932A
Manufacturer substitutionThis part replaces 750-0932A. Substitute parts can look different from the original.This item is not returnableIn Stock$29.87QtyDrive diagram
Shaft
Part #738-0569Replaced by #938-0569
Manufacturer substitutionThis part replaces 738-0569. Substitute parts can look different from the original.In Stock$47.89QtyGrille/ hood and fender diagram
Wire
Part #746-0634Replaced by #946-0634
Manufacturer substitutionThis part replaces 746-0634. Substitute parts can look different from the original.This item is not returnableIn Stock$21.46QtyLift diagram
Index Bracket
Part #17730Replaced by #783-04113P
Manufacturer substitutionThis part replaces 17730. Substitute parts can look different from the original.In Stock$60.96QtyTransaxle diagram
Extension Spring
Part #732-04050AReplaced by #732-04050D
Manufacturer substitutionThis part replaces 732-04050A. Substitute parts can look different from the original.In Stock$52.08QtyDeck "h" diagram
Lawn Mower Blade
Part #742-0644Replaced by #942-0611A
Manufacturer substitutionThis part replaces 742-0644. Substitute parts can look different from the original.This item is not returnableGet free shipping with Automatic ReorderIn Stock$33.5415% OFF Phone Price : $39.54Qty
Most common symptoms to help you fix your riding mowers & tractors
Choose a symptom to see related riding mower and lawn tractor repairs.
Main causes: damaged tie rods, bent or worn wheel spindle, worn front axle, damaged sector gear assembly…
Main causes: dead battery, stale fuel, bad starter solenoid, ignition system problem, bad ignition interlock switch, clo…
Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged ma…
Main causes: engine overfilled with oil, leaky head gasket or sump gasket, damaged carburetor seals, cracked fuel pump, …
Main causes: punctured tire or inner tube, leaky valve stem, damaged wheel rim…
Main causes: unlevel mower deck, dull or damaged cutting blades, worn mandrel pulleys, bent mower deck, engine needs tun…
Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, …
Main causes: faulty battery, bad alternator…
Main causes: shift lever needs adjustment, neutral control needs adjustment…
Most common repair guides to help fix your riding mowers & tractors
These step-by-step repair guides will help you safely fix what’s broken on your riding mower or lawn tractor.
How to replace the starter solenoid on a riding lawn mower
Replace the starter solenoid if it doesn't click when you turn the ignition key.…
Repair time and Difficulty
30 minutes or less
How to replace a riding lawn mower ignition coil
If you're not getting spark from a good spark plug, the problem could be the ignition coil. Follow these step-by-step in…
Repair time and Difficulty
30 minutes or less
How to replace a riding lawn mower fuel filter
Help your mower run better by replacing the fuel filter during your riding mower's annual tune-up.…
Repair time and Difficulty
15 minutes or less
Effective articles & videos to help repair your riding mowers & tractors
Use the advice and tips in these articles and videos to get the most out of your riding mower or lawn tractor.
Get answers to frequently asked questions about Sears and Sears PartsDirect.…
Learn some of the most common symbols found in a wiring diagram and what they mean.…
Learn how to connect cables safely to jump-start your mower’s battery.…
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