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Companion 917278121 lawn tractor Parts
Here are the diagrams and repair parts for Companion 917278121 lawn tractor, as well as links to manuals and error code tables, if available.
Owner’s manual
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Browse Parts for 917278121 Riding Mowers & Tractors
Peerless pmst transaxle diagram
Brake Pad
Part #799021Replaced by #799021
Manufacturer substitutionThis part replaces 799021. Substitute parts can look different from the original.$12.2214% OFF Phone Price : $14.22
Qty
Mower diagram
Bolt
Part #72140610Replaced by #583611601
Manufacturer substitutionThis part replaces 72140610. Substitute parts can look different from the original.This item is not returnableIn Stock$9.26QtyPeerless pmst transaxle diagram
Spring
Part #792079Replaced by #792079
Manufacturer substitutionThis part replaces 792079. Substitute parts can look different from the original.This item is not returnableIn Stock$3.8521% OFF Phone Price : $4.85QtyChassis and enclosures diagram
Lawn Tractor Thread Rolling Screw
Part #17670508Replaced by #817670508
Manufacturer substitutionThis part replaces 17670508. Substitute parts can look different from the original.In Stock$14.83QtyMower diagram
Lawn Mower Mandrel Shaft
Part #165482Replaced by #532165482
Manufacturer substitutionThis part replaces 165482. Substitute parts can look different from the original.In Stock$135.22QtyBagger diagram
Drilled Rivet
Part #126875XReplaced by #532126875
Manufacturer substitutionThis part replaces 126875X. Substitute parts can look different from the original.This item is not returnableIn Stock$5.0317% OFF Phone Price : $6.03QtyBagger diagram
Plug Support
Part #175401Replaced by #583576301
Manufacturer substitutionThis part replaces 175401. Substitute parts can look different from the original.This item is not returnableIn Stock$7.40QtyChassis and enclosures diagram
Lawn & Garden Equipment Screw
Part #142432Replaced by #596134101
Manufacturer substitutionThis part replaces 142432. Substitute parts can look different from the original.This item is not returnableIn Stock$5.54QtySeat assembly diagram
Husqvarna Lawn Tractor Seat Pivot Bracket (black)
Part #180166Replaced by #532180166
Manufacturer substitutionThis part replaces 180166. Substitute parts can look different from the original.In Stock$35.70QtyMower diagram
Carriage Bolt, 5/16-18 X 3/4-in
Part #72110506Replaced by #872110506
Manufacturer substitutionThis part replaces 72110506. Substitute parts can look different from the original.In Stock$27.04Qty
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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