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Triarc blade

Cutter bar-tbo

Blade MTD 21 Inch
Sharp, balanced blades are the heart of clean cuts and healthy grass. Homelite lawn mower blades wear faster than you'd expect—dull blades tear grass instead of slicing it, weakening your lawn and stressing the engine. Repair Clinic stocks genuine OEM Homelite lawn mower blade parts including replacement blades, spindle assemblies, and deck parts that fit your exact model.
A good approach is to inspecting blades every 20 operating hours and replacing them immediately if you notice bending, cracking, or uneven wear. Installing OEM parts ensures proper blade rotation speed and deck balance—critical for mulching performance and engine longevity.
Grass contains silica and dirt particles that dull blades naturally. If your blade dulls within 10–15 hours of mowing, you're likely hitting rocks, sticks, or hardened soil frequently. Inspect your mowing area before each use and sharpen or replace blades every 20–40 hours depending on conditions. OEM Homelite blades are engineered to hold an edge longer than aftermarket alternatives.
Check the frame or deck underside—most Homelite models have a stamped or decal-applied model number there. You can also check the operator manual pocket or original purchase receipt. Once you have the model number, use Repair Clinic's parts lookup tool to match the exact OEM blade assembly.
Yes, dull but undamaged blades can be sharpened using a metal file or angle grinder. File at the blade's original angle (typically 30–45 degrees) and maintain balance—an imbalanced blade causes dangerous vibration. If the blade is cracked, bent, or has metal fatigue, replacement is safer and more cost-effective than sharpening.
A blade is just the cutting edge; a spindle assembly includes the blade, housing, bearings, and mounting hardware. If your spindle bearings are shot (indicated by squeaking or grinding), replacing the full assembly restores proper blade rotation and prevents deck damage.


Maintain optimal cutting performance with genuine Homelite Lawn Mower blade parts from Repair Clinic. Replacing mower blades is key for a clean, efficient cut and to prevent damage to your lawn. Utilize our model number lookup to find compatible blade parts quickly. Experience the convenience of same-day shipping, No-Hassle 365-Day Returns, and a Price Match Guarantee. Proper blade maintenance ensures your Homelite mower delivers pristine results every time. For expert installation tips, visit our Lawn Mower Repair Help page. Find additional Homelite Lawn Mower Parts to improve your equipment.
Homelite usually prints the lawn mower model number on a label or metal plate near the blade deck, under the seat, or on the engine housing. Check these spots after shutting off the mower and removing the key or spark plug wire as appropriate. The model number identifies the entire unit, not just its blade or another individual part. Once you have it, search that number and the results will narrow the catalog to parts built for your Homelite mower. This gives you a model-specific starting point, so you can check fit quickly and avoid ordering parts meant for a different configuration.

Sharp blades and well-tensioned chains cut cleanly and reduce strain on your Homelite Lawn Mower. Repair Clinic stocks OEM blades and chains for a wide range of outdoor equipment, along with installation and sharpening videos. Use the model number lookup to confirm the exact specification for your unit, and consider keeping a spare on hand for the season.

Repair Clinic has five ways for you to stop your lawn mower from leaking gas. Before we get to those, let's review how the gasoline you pour into the tank powers the mower.

Why does your lawn mower battery keep dying? Repair Clinic has done the research and this article will provide some answers, starting with what a battery's purpose is on a gas-powered lawn mower.

What's causing that black smoke to billow out of the engine? There are three likely reasons and they are all related to how a gas-powered lawn mower engine operates.