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Troybilt 420 lawn mower Parts
Here are the diagrams and repair parts for Troybilt 420 lawn mower, as well as links to manuals and error code tables, if available.
Owner’s manualBy Schematic
By Part
SELECT DIAGRAM
Browse Parts for 420 Walk-Behind Mowers
Rotary mower diagram
Wing Nut
Part #712-0397Replaced by #712-0397A
Manufacturer substitutionThis part replaces 712-0397. Substitute parts can look different from the original.This item is not returnableIn Stock$6.1714% OFF Phone Price : $7.17
Qty
Rotary mower diagram
Cable Tie
Part #726-0240Replaced by #726-0178
Manufacturer substitutionThis part replaces 726-0240. Substitute parts can look different from the original.This item is not returnableIn Stock$25.35QtyRotary mower diagram
Adjustment Assembly
Part #687-02075AReplaced by #987-02075B
Manufacturer substitutionThis part replaces 687-02075A. Substitute parts can look different from the original.In Stock$48.1611% OFF Phone Price : $54.16QtyRotary mower diagram
Lawn Mower Blade Support
Part #736-0524BReplaced by #736-0524B-1
Manufacturer substitutionThis part replaces 736-0524B. Substitute parts can look different from the original.In Stock$8.2711% OFF Phone Price : $9.27QtyRotary mower diagram
Lawn Mower Lever
Part #732-0404Replaced by #94832
Manufacturer substitutionThis part replaces 732-0404. Substitute parts can look different from the original.This item is not returnableIn Stock$20.1723% OFF Phone Price : $26.17QtyRotary mower diagram
Grsbg 21" 40
Part #664-04011Replaced by #964-04007A
Manufacturer substitutionThis part replaces 664-04011. Substitute parts can look different from the original.In Stock$169.607% OFF Phone Price : $181.60QtyRotary mower diagram
Lawn Mower Rear Skirt Wire Rod
Part #732-0700Replaced by #732P0700
Manufacturer substitutionThis part replaces 732-0700. Substitute parts can look different from the original.This item is not returnableIn Stock$8.09QtyRotary mower diagram
Upper Handle
Part #749-1092AReplaced by #749-1092A-0637
Manufacturer substitutionThis part replaces 749-1092A. Substitute parts can look different from the original.In Stock$44.8140% OFF Was : $74.89QtyRotary mower diagram
Lawn Mower Height Adjuster Knob
Part #720-0426Replaced by #731-13116-1
Manufacturer substitutionThis part replaces 720-0426. Substitute parts can look different from the original.This item is not returnableIn Stock$44.09QtyRotary mower diagram
Arm Assembly
Part #687-02077AReplaced by #987-02077A
Manufacturer substitutionThis part replaces 687-02077A. Substitute parts can look different from the original.In Stock$28.1818% OFF Phone Price : $34.18Qty
Most common symptoms to help you fix your walk-behind mowers
Choose a symptom to see related walk-behind mower repairs.
Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…
Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…
Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…
Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…
Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…
Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…
Repair guides for gas walk-behind mowers
These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.
How to replace a lawn mower front deck tray
Learn how to replace the front deck tray on your lawn mower if it's cracked or damaged.…
Repair time and Difficulty
60 minutes or less
How to replace a lawn mower transmission
Learn how to replace the transmission on your lawn mower if it's locked up or won't drive the wheels.…
Repair time and Difficulty
60 minutes or less
How to replace a lawn mower flywheel key on a flathead engine
When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…
Repair time and Difficulty
45 minutes or less
Effective articles & videos to help repair your walk-behind mowers
Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.
Wondering when to mow your lawn for the best results? Timing matters more than you might think. Discover the best time o…
See a comparison of cordless lawn mowers and gas mowers so you can decide which is best for you.…
Learn about a new feature added to the Search Bar on Sears PartsDirect…
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