- Kenmore refrigerator water filters
- Whirlpool refrigerator water filters
- Samsung refrigerator water filters
- GE refrigerator water filters
- LG refrigerator water filters
- Frigidaire refrigerator water filters
- KitchenAid refrigerator water filters
- Maytag refrigerator water filters
- Kenmore Elite refrigerator water filters
- Estate refrigerator water filters
- GE Profile refrigerator water filters
- Amana refrigerator water filters
- Bosch refrigerator water filters
- Dacor refrigerator water filters
- Electrolux refrigerator water filters
Top DIY repair help
View All Repair Categories
Appliances
Lawn & Garden
Power Tools
Home Improvement
Sports & Leisure
Heating & Cooling
MTD 678 lawn tractor Parts
Here are the diagrams and repair parts for MTD 678 lawn tractor, as well as links to manuals and error code tables, if available.
Owner’s manualBy Schematic
By Part
SELECT DIAGRAM
Browse Parts for 678 Riding Mowers & Tractors
Lock Washer
Part #736-0158Replaced by #736-0158
Manufacturer substitutionThis part replaces 736-0158. Substitute parts can look different from the original.In Stock$25.82
Qty
Steering diagram
Rod-tie-non
Part #747-0861Replaced by #747-0861-0637
Manufacturer substitutionThis part replaces 747-0861. Substitute parts can look different from the original.In Stock$43.0312% OFF Phone Price : $49.03
QtyLock Washer
Part #736-0329Replaced by #936-0329
Manufacturer substitutionThis part replaces 736-0329. Substitute parts can look different from the original.This item is not returnableIn Stock$8.20QtySocket Cap Screw
Part #710-1314Replaced by #710-1314A
Manufacturer substitutionThis part replaces 710-1314. Substitute parts can look different from the original.In Stock$6.9413% OFF Phone Price : $7.94QtySpeed control diagram
Washer
Part #736-0253Replaced by #936-0253
Manufacturer substitutionThis part replaces 736-0253. Substitute parts can look different from the original.This item is not returnableIn Stock$5.8615% OFF Phone Price : $6.86QtySeat and main frame diagram
Tie Strap
Part #726-0209Replaced by #726-0230
Manufacturer substitutionThis part replaces 726-0209. Substitute parts can look different from the original.This item is not returnableIn Stock$39.02QtyDeck "g" diagram
Spindle Assembly
Part #618-0142Replaced by #918-0142C
Manufacturer substitutionThis part replaces 618-0142. Substitute parts can look different from the original.In Stock$118.359% OFF Phone Price : $130.35QtyHarness Assembly
Part #629-0305BReplaced by #929-0305E
Manufacturer substitutionThis part replaces 629-0305B. Substitute parts can look different from the original.In Stock$221.175% OFF Phone Price : $233.17QtySeat and main frame diagram
Lawn & Garden Equipment Screw
Part #710-1268Replaced by #710-1268
Manufacturer substitutionThis part replaces 710-1268. Substitute parts can look different from the original.This item is not returnableIn Stock$2.16QtyDrive diagram
Speed Belt
Part #754-0280Get free shipping with Automatic ReorderReplaced by #954-0280A
Manufacturer substitutionThis part replaces 754-0280. Substitute parts can look different from the original.In Stock$57.409% OFF Phone Price : $63.40Qty
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.…
Parts & More
Electric Water Heater
Gas Cooktop
Gas Range
Gas Walk-Behind Mower
Line Trimmer
Pressure Washer
Refrigerator
Snowblower
Vacuum Cleaner
Walk-Behind Mower