Are gas lawn mowers being phased out?
Gas walk-behind mowers (including the MTD 550) are not being universally phased out, but some states and cities are restricting the sale or use of certain new gasoline-powered outdoor power equipment. In most areas, you can still own, repair, and use a gas mower; rules mainly affect new purchases and commercial fleets.
What’s actually changing (and what isn’t)
- Most restrictions target new equipment sales, not existing mowers.
- Many rules focus on small off-road engines (mowers, trimmers, blowers), but details vary.
- Some programs include rebates or incentives to switch to battery equipment.
- Enforcement and timelines differ by location; some areas have no restrictions.
- Parts support remains strong for gas mowers because millions are still in service.
How to decide whether to keep your MTD 550 gas mower
If your mower starts easily, cuts cleanly, and self-propel (if equipped) works correctly, keeping it is usually the most cost-effective option.
Quick keep-or-replace checklist
- Engine starts within 1 to 3 pulls when tuned
- No heavy smoke or oil consumption
- Deck is solid (no major rust-through)
- Wheels and height adjusters hold position
- You can still get common wear parts and hardware
Common parts that help extend mower life
These model-matched parts are often used when you’re tightening up the handle, bagging setup, or drive components:
| Symptom or need | Part that often helps | Example from this model |
|---|---|---|
| Loose handle hardware | Handle knob | Yard machines lawn mower handle knob 720-04072A |
| Bagging frame bent or broken | Grass bag frame | Lawn mower grass bag frame 747-04080A |
| Mower won’t drive correctly | Drive pinion gear | Lawn mower drive pinion gear 717-1761 |
| Blade slips or won’t stay tight | Blade adapter | Adapter assembly 687-02221 |
Why it matters
If your area restricts new gas equipment sales, maintaining your existing MTD 550 can be the simplest way to avoid an unplanned switch. A basic tune-up routine and replacing worn drive or handle parts can keep cut quality and safety where they should be.
For blade-related maintenance that improves cut quality and reduces vibration, follow how to sharpen a lawn mower blade.
Last updated: February 2026
How do I find MTD replacement parts?
For your MTD walk-behind mower model 550, the fastest way to get the right replacement part is to match the part to your mower’s exact model and the part’s description, then confirm the hardware size and where it installs (handle, deck, drive, or bagger). Use a known part listing such as lawn mower control cable 746-1132 as a reference point when comparing.
Step-by-step: how we recommend finding the correct part
- Confirm the model number is 550 (from the mower’s model tag).
- Identify the system you’re repairing: drive, handle controls, cutting deck, or bagger.
- Match the part by name and function first (for example, control cable vs. height adjuster).
- Then match by part number (for example, 746-1132).
- Compare mounting style and hardware (nuts, bolts, knobs) before ordering.
- If multiple similar parts appear, choose the one that matches your mower’s exact location and configuration.
Common MTD 550 part types customers replace
| What’s not working | Part type to look for | Example from this model’s parts |
|---|---|---|
| Engine won’t shut off or control feels loose | Control cable | Lawn mower control cable 746-1132 |
| Self-propel issues or clicking in drive | Drive gear components | Drive pinion gear (717-1761, 717-1762) |
| Bagging problems or frame damage | Bagger components | Grass bag frame (747-04080A), grass bag (964-04007A) |
| Cutting height won’t hold | Height adjuster parts | Height adjuster (987-02194A) |
Helpful tips to avoid ordering the wrong part
- Measure bolt and nut sizes if you’re replacing fasteners (common examples include 710-1241 screws and 712-04065 flange nuts).
- For cables, compare overall length and end fittings to your original cable.
- For wheels and height adjusters, confirm left vs. right orientation when applicable.
Why it matters
MTD walk-behind mowers often use similar-looking hardware across multiple series; matching by model 550 plus the exact part number helps ensure proper fit, safe operation, and correct deck height and drive performance.
Last updated: February 2026
How do I identify my MTD model number?
Your MTD walk-behind mower’s model number is printed on the equipment identification tag (not on the engine). For the MTD model 550 page, we use that tag number to match the correct diagrams and parts so you order the right items the first time.
Where to look on an MTD walk-behind mower
Check these common tag locations (wipe off grass and dirt first):
- On the rear of the mower deck near the discharge opening
- On the back of the deck near the bagging door or rear flap area
- On the side of the deck above a rear wheel
- On the handle bracket or lower handle mounting area
- Under the rear shield area (you may need a flashlight)
What the model number looks like (and what to write down)
MTD model numbers are often a mix of numbers and letters. Write down everything exactly as shown.
- Model number (sometimes called “model”)
- Serial number (sometimes called “serial”)
- Product number or factory number (if listed)
Quick check table
| What you see on the tag | What it’s used for | Tip |
|---|---|---|
| Model number | Matches parts diagrams to your mower | Copy letters and dashes exactly |
| Serial number | Identifies production run | Helpful when parts changed mid-year |
| Engine model/type/code | Identifies engine parts only | Engine parts are matched separately |
Why it matters
MTD uses similar-looking decks, handles, and drive systems across many walk-behind mowers. Using the exact tag model number prevents ordering the wrong hardware, cables, or drive components.
Related DIY help
If you are already working on the mower, these guides help with common service tasks:
Last updated: February 2026
How do I tell what year my MTD lawnmower is?
To tell the year your MTD lawn mower was made, we use the serial number: on most MTD 11-character serial numbers, the 5th character is the last digit of the manufacturing year (for example, a 5th character of 9 indicates a year ending in 9). Use your full serial number to narrow it to the correct decade.
Where to find the serial number on an MTD 550 mower
Common serial number locations on walk-behind mowers include:
- The rear of the mower deck (near the discharge opening or rear door)
- The top of the deck near the engine mounting area
- The back panel or rear skirt area
- A label near the handle mounting brackets
If the label is dirty or faded, wipe it with a damp rag and mild soap; avoid harsh solvents that can remove printing.
How to decode the year (and avoid the decade mix-up)
Because the 5th character is only one digit, it repeats every 10 years. We recommend using these clues to pick the right decade:
- Engine style and primer/choke setup (older designs often look noticeably different)
- Deck condition and paint style (older decks typically show different stamping and finish)
- Parts match: confirm the mower’s configuration by comparing common wear parts like the adapter assembly 687-02221
- Serial number format: confirm it is truly an 11-character MTD serial number
Quick example
| 5th character | What it tells you | What you still need |
|---|---|---|
| 0-9 | Last digit of the year | The decade (for example, 2009 vs 2019) |
Why it matters
Knowing the correct manufacturing year helps us match the right walk-behind mower parts (blade adapter, control cable, height adjuster, wheels) and prevents ordering hardware that looks similar but fits differently.
If you’re already servicing the mower, our how to tune up a lawn mower video is a good next step for seasonal maintenance.
Last updated: February 2026
Is it cheaper to repair or replace a lawn mower?
For an MTD model 550 gas walk-behind mower, it’s usually cheaper to repair when the fix is a wear item (cable, wheel, blade adapter, handle hardware) and the engine still runs well. Replacement makes more sense when the engine or deck is failing and multiple major parts are needed.
Quick rule of thumb (repair vs. replace)
- Repair if the mower starts, runs smoothly, and the issue is drive, control, or hardware related.
- Replace if the engine has low compression, heavy smoke, or the deck is cracked or badly rusted.
- Repair if you can fix it with 1 to 3 common parts and basic tools.
- Replace if you’re facing repeated no-start problems plus drive issues in the same season.
- Repair if the mower meets your needs (cut quality, bagging, self-propelled performance).
Common “worth repairing” fixes on walk-behind mowers
These are typically straightforward and cost-effective compared to buying a new mower:
- Handle and control issues (loose or broken knobs, bent handle sections)
- Self-propelled drive problems caused by worn gears or linkage
- Bagging problems (torn bag, damaged frame)
- Cutting issues caused by a worn blade adapter or loose hardware
Helpful model-related examples from available parts:
Cost comparison guide
| Situation | Typical parts cost | Typical DIY time | Best choice |
|---|---|---|---|
| One broken cable or knob | Low | 30 to 60 min | Repair |
| Drive slips due to worn gear | Medium | 1 to 2 hrs | Repair |
| Bagging hardware damaged | Medium | 30 to 90 min | Repair |
| Engine smokes, surges, and won’t restart hot | High/uncertain | 2+ hrs | Replace |
| Deck is cracked or severely rusted through | High | Not practical | Replace |
Why it matters
A walk-behind mower’s value is mostly in the engine and deck. When those are solid, replacing wear parts restores reliability for a fraction of the cost of a new mower.
Related DIY help
Last updated: February 2026
What are the downsides of a reel mower?
A reel mower can deliver a clean, scissor-like cut, but the main downsides are that it struggles in tall or wet grass, can jam on twigs and small rocks, and requires more frequent blade maintenance than most rotary mowers like the MTD 550.
Common downsides to expect
- Poor performance in tall grass: reel blades work best when grass is kept short and mowed often.
- More jamming: sticks, pinecones, and small stones can stop the reel or nick the blades.
- More effort: manual reel mowers take more pushing force, especially on thick turf or slopes.
- Maintenance sensitivity: the reel-to-bedknife adjustment matters; if it is off, cut quality drops fast.
- Not ideal for rough lawns: uneven ground can lead to scalping or missed patches.
Reel mower vs. gas walk-behind mower (quick comparison)
| Feature | Reel mower | Gas walk-behind mower (like MTD 550) |
|---|---|---|
| Best grass height | Short, maintained frequently | Handles short to moderately tall grass |
| Debris tolerance | Low (jams easily) | Higher (still avoid rocks/sticks) |
| Effort | Higher (manual push) | Lower (engine does the cutting) |
| Blade upkeep | Frequent sharpening/adjustment | Periodic sharpening and balancing |
Blade care tips that reduce the biggest reel-mower complaints
Even if you stay with a rotary mower, good blade habits prevent tearing and browning.
- Pick up sticks and stones before mowing.
- Mow more often during fast growth.
- Avoid mowing wet grass when possible.
- Keep the blade sharp and balanced.
For step-by-step blade maintenance, use our guide: how to sharpen a lawn mower blade.
Why it matters
Choosing the wrong mower type usually shows up as uneven cutting, extra time spent mowing, and more frequent blade damage. If your lawn grows quickly or has debris, a gas walk-behind mower is typically the more forgiving option.
Last updated: February 2026
What brand of lawn mowers does MTD make?
MTD makes and markets lawn mowers under several well-known brand names. For your MTD model 550 walk-behind mower, you will commonly see MTD products sold as Cub Cadet, Troy-Bilt, Yard Machines, Yard-Man, Bolens, Columbia, and Remington, along with MTD-branded equipment.
Common MTD lawn mower brands
These are the brand families most often associated with MTD walk-behind mowers and related outdoor power equipment:
- MTD
- Cub Cadet
- Troy-Bilt
- Yard Machines
- Yard-Man
- Bolens
- Columbia
- Remington
Why the brand name matters when buying parts
Branding can change the decals and styling, but parts selection still depends on the exact mower model and the specific component you are replacing (handle hardware, drive parts, deck parts, bagging parts, etc.). For example, if you are repairing a handle or bagging setup, matching the correct part listing for model 550 prevents fit issues.
Examples of model 550 parts you might match by application
| Repair need | Example part you may see listed | What it helps with |
|---|---|---|
| Handle hardware loosens | Lawn mower handle knob 720-04072A | Secures/adjusts handle sections |
| Bagging frame damage | Lawn mower grass bag frame 747-04080A | Supports the grass bag assembly |
| Self-propel drive issue | Lawn mower drive pinion gear 717-1761 | Transfers motion in the drive system |
Quick tips to identify your exact brand and build
- Check the engine shroud and mower deck decals for the brand name.
- Look for the model and serial tag on the deck or rear housing.
- Match parts by the full model identification (not just the brand family).
- If multiple versions exist, compare diagrams and mounting points before ordering.
Why it matters
MTD’s multiple brand names can make two mowers look different even when they share the same underlying design. Using the model-based parts list for MTD 550 keeps repairs accurate and avoids ordering the wrong hardware, cable, or drive components.
Last updated: February 2026
