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MTD 13BL78XT099 lawn tractor Parts
Here are the diagrams and repair parts for MTD 13BL78XT099 lawn tractor, as well as links to manuals and error code tables, if available.
Owner’s manual
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Browse Parts for 13BL78XT099 Riding Mowers & Tractors
Transmission diagram
Lawn & Garden Equipment Lock Washer
Part #936-0169Replaced by #736-0169
Manufacturer substitutionThis part replaces 936-0169. Substitute parts can look different from the original.This item is not returnableIn Stock$5.60
Qty
Steering/wheels diagram
Lawn Tractor Steering Block
Part #748-04278-0637Replaced by #748-04278
Manufacturer substitutionThis part replaces 748-04278-0637. Substitute parts can look different from the original.In Stock$34.1115% OFF Phone Price : $40.11
QtyFuel tank/upper dash panel diagram
Lawn Tractor Ignition Key
Part #625-04124Replaced by #925-1745A
Manufacturer substitutionThis part replaces 625-04124. Substitute parts can look different from the original.In Stock$25.7019% OFF Phone Price : $31.70QtyTransmission diagram
Lawn Tractor Variable-speed Guide
Part #683-04522Replaced by #783-06227A
Manufacturer substitutionThis part replaces 683-04522. Substitute parts can look different from the original.In Stock$26.0419% OFF Phone Price : $32.04QtyFrame/battery/lift diagram
Lawn Tractor Shoulder Screw
Part #938-0380Replaced by #738-0380
Manufacturer substitutionThis part replaces 938-0380. Substitute parts can look different from the original.In Stock$39.03QtyTransmission diagram
Lawn Tractor Transaxle
Part #918-04566AReplaced by #618P09815
Manufacturer substitutionThis part replaces 918-04566A. Substitute parts can look different from the original.In Stock$557.62QtySteering/wheels diagram
Lawn & Garden Equipment Cotter Pin
Part #914-0474Replaced by #714-0474
Manufacturer substitutionThis part replaces 914-0474. Substitute parts can look different from the original.In Stock$35.93QtyDeck/spindle pulley diagram
Lawn Tractor Blade Brake
Part #983-05183Replaced by #753-09904A
Manufacturer substitutionThis part replaces 983-05183. Substitute parts can look different from the original.In Stock$109.2534% OFF Was : $164.35QtyTransmission diagram
Lawn Tractor Drive Pedal Shaft
Part #947-04201A-0637Replaced by #947-04201B-0637
Manufacturer substitutionThis part replaces 947-04201A-0637. Substitute parts can look different from the original.In Stock$71.53QtySeat/fender diagram
Lawn Tractor Shoulder Screw
Part #938-0296Replaced by #738-0296
Manufacturer substitutionThis part replaces 938-0296. Substitute parts can look different from the original.This item is not returnableIn Stock$6.60Qty
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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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