FUXTEC FX-RM4646 Review: Premium Self-Propelled Mower for Larger Lawns
Tired of pushing a heavy mower across your entire garden? The FUXTEC FX-RM4646 is a game-changer for homeowners with medium to large lawns. This self-propelled gas mower combines the power of a 146cc engine with rear-wheel drive automation, eliminating the physical strain of manual mowing. Add a true 3-in-1 cutting system (mulching, bagging, and side discharge) and a generous 46cm cutting width, and you have a mower that delivers professional results without the professional price tag. In this comprehensive review, we examine every feature to help you decide if it's your ideal lawn solution.
Quick Specs at a Glance
Product Overview
The FUXTEC FX-RM4646 is the professional-grade option from FUXTEC's consumer lineup. It retains the proven 146cc engine from the budget FX-RM4346ECO but adds a rear-drive propulsion system that does the pushing for you. The result is a mower that feels significantly more capable and comfortable to operate, especially on larger properties or sloped terrain.
At 34 kg, the FX-RM4646 is heavier than its budget sibling, but the self-propulsion system makes this irrelevant—you're not pushing weight, you're guiding direction and controlling speed. The 46cm cutting width covers more grass per pass, reducing mowing time by 15–20% compared to 42cm alternatives.
Perfect for gardens between 400–800 m², this mower bridges the gap between budget push mowers and expensive riding mowers, offering comfort and efficiency at a mid-range price.
Self-Propulsion System
The standout feature of the FX-RM4646 is its rear-wheel drive self-propulsion. Here's how it works and why it matters:
- Automatic forward movement: The mower moves itself forward at a controlled speed. You simply grip the handle and guide direction—no pushing required.
- Speed control: A throttle lever on the handle lets you adjust the mower's speed from slow (perfect for thick grass) to fast (for quick passes over thin lawn).
- Fatigue reduction: On a 400 m² lawn, you'll notice the difference immediately. Self-propulsion cuts mowing fatigue by 60–70%.
- Terrain capability: The rear-drive system handles slopes and uneven ground far better than push mowers. You can confidently tackle lawns with gentle hills.
- No batteries required: Unlike electric self-propelled mowers, the FX-RM4646's propulsion runs entirely on gasoline—unlimited runtime.
The system engages through a simple lever on the handle. There's no complex controls—just point, pull the lever, and let the mower do the work. Emergency disengagement is also simple: release the lever and the self-propulsion stops immediately.
Cutting Performance & 46cm Width
The 46cm cutting width is noticeably wider than typical 42cm budget mowers. This seemingly small difference has practical benefits:
- 300 m² lawn: 42cm = ~45 min | 46cm = ~40 min (5 min faster)
- 500 m² lawn: 42cm = ~75 min | 46cm = ~65 min (10 min faster)
- 700 m² lawn: 42cm = ~105 min | 46cm = ~90 min (15 min faster)
The blade is hardened steel and maintains exceptional edge retention. The cutting deck is engineered to provide even, clean cuts from edge to edge—no scalping on uneven ground. Blade sharpening is recommended every 10–12 hours of use.
3-in-1 System: Mulch, Bag & Side Discharge
Where the FX-RM4646 truly excels is versatility. Most gas mowers force you to choose: collect or nothing. The FX-RM4646 offers three options via a simple lever:
- Bagging mode: Grass is collected in the 50-liter bag. Perfect for formal lawns and cleanup. The bag fills slowly due to excellent collection efficiency.
- Mulching mode: Grass clippings are finely chopped and returned to the lawn, providing natural fertilization. Ideal for reducing mowing waste and promoting lawn health. Works best on dry grass.
- Side discharge: Clippings are ejected sideways. Best for rapid clearing of tall, overgrown grass or heavy growth periods. Creates a visible stripe pattern on the lawn.
Switching modes takes seconds. No tools required—just flip the lever and continue mowing. This flexibility is invaluable for adapting to seasonal changes and different lawn conditions.
Engine Power & Fuel Efficiency
The 146cc 4-stroke engine is identical in displacement to the FX-RM4346ECO but tuned differently for self-propulsion. The 2.6 kW output provides plenty of cutting force even in dense or wet grass.
- 4-stroke design: No fuel-to-oil mixing. Add gasoline and oil separately—simpler, cleaner operation.
- Low emissions: Modern 4-stroke technology means fewer emissions than older 2-stroke models.
- Quiet operation: At approximately 88–92 dB, it's acceptable for daytime weekend mowing.
- Fuel efficiency: Expect 1 liter of fuel to cover 350–450 m² under normal conditions. The self-propulsion system consumes slightly more fuel than a push version due to the drive mechanism.
- Reliable pull-start: The recoil starter is robust and typically fires within 2–3 pulls when cold, once you learn the technique.
Pros & Cons Analysis
✓ Pros
- ✅ Self-propulsion eliminates pushing: Mow with minimal physical effort, even on large lawns
- ✅ 46cm cutting width: Faster mowing compared to 42cm alternatives
- ✅ True 3-in-1 system: Mulch, bag, or side discharge—maximum flexibility
- ✅ 7-position height adjustment: 25–75mm range suits any grass type
- ✅ Powerful engine: Handles tall, thick, or wet grass without bogging down
- ✅ Excellent value: Self-propelled mower at mid-range price
✗ Cons
- ❌ Heavier (34 kg): Not ideal if you need to lift it frequently or have limited storage space
- ❌ Louder than push mowers: At 88–92 dB, it's noticeable during early morning mowing
- ❌ Manual pull start: Can be difficult for elderly or weak users
- ❌ Limited to ~800 m²: For very large properties, a riding mower is more practical
- ❌ Requires regular fuel management: Ethanol in standard gas degrades in 30 days; use fuel stabilizer for storage
FUXTEC FX-RM4646 vs FX-RM4346ECO
Both are excellent FUXTEC options, but they target different needs. Here's the detailed comparison:
| Feature | FX-RM4346ECO | FX-RM4646 |
|---|---|---|
| Self-Propulsion | ❌ No (push only) | ✅ Yes (rear drive) |
| Engine | 146cc, 2.2 kW | 146cc, 2.6 kW |
| Cutting Width | 42 cm | 46 cm |
| 3-in-1 Cutting | ❌ Bag only | ✅ Mulch/Bag/Discharge |
| Height Positions | 6 (25–75 mm) | 7 (25–75 mm) |
| Weight | 27 kg | 34 kg |
| Bag Capacity | 40 liters | 50 liters |
| Price | ~$200–250 | ~$400–450 |
| Best For | Small lawns <300 m² | Medium-large lawns 400–800 m² |
Verdict: The FX-RM4346ECO is the smart choice if your lawn is under 300 m² and you're comfortable with push effort. The FX-RM4646 is worth the upgrade if your garden exceeds 350 m², you value comfort, or you want the flexibility of a 3-in-1 cutting system.
Who Should Buy This Mower?
The FUXTEC FX-RM4646 is ideal for:
- ✅ Homeowners with medium-large lawns: 400–800 m² of grass
- ✅ Comfort-conscious users: Those who want to avoid pushing fatigue
- ✅ Sloped or hilly properties: Self-propulsion handles terrain better than push mowers
- ✅ Flexibility seekers: Users who want mulching, bagging, and discharge options
- ✅ Weekly lawn maintainers: Regular mowing sessions where comfort matters
- ✅ Those avoiding riding mower complexity: Self-propelled is simpler than riding without the push effort
Not recommended for: Very small gardens (under 250 m²), those with limited storage space, or anyone seeking a quiet operation for early morning use.
Our Recommendation
✅ FUXTEC FX-RM4646 — Best Premium Self-Propelled Mower
This is our top recommendation for homeowners seeking a self-propelled gas mower that doesn't require the investment of a riding machine. The combination of automatic propulsion, 3-in-1 versatility, and a 46cm cutting width makes it a practical upgrade over budget push mowers. With 4.4 stars from 1,240+ verified users, real owners confirm its quality and reliability.
At 34 kg, it's heavier than push mowers—but the self-propulsion makes this irrelevant. You're guiding, not pushing. For lawns between 400–800 m², this mower delivers premium comfort without premium pricing.
FUXTEC FX-RM4646
- ✓ 146cc self-propelled 4-stroke engine (2.6 kW)
- ✓ 46cm cutting width, 50L grass bag
- ✓ 3-in-1 system: mulch, bag, side discharge
- ✓ 7 height positions (25–75mm)
- ✓ Rear-wheel drive propulsion — zero pushing
Price on Amazon.com
Maintenance & Usage Tips
To keep your FUXTEC FX-RM4646 running smoothly and reliably for 10+ years:
- Oil changes: Every 50 hours of use or once per season. Use 10W-30 synthetic oil for best performance.
- Spark plug: Inspect every season; replace annually for easy starting and consistent power.
- Blade maintenance: Sharpen every 10–12 hours of cutting. A sharp blade prevents grass damage and improves mulching quality.
- Air filter: Clean monthly during heavy use; replace annually. A clean filter improves fuel efficiency and engine power.
- Fuel management: Use fresh fuel each season. Ethanol in standard gasoline degrades in 30 days—add fuel stabilizer (Sta-Bil, TruFuel) before storage.
- Propulsion system: Check the drive belt for wear every season. It's a simple replacement (under $30) that keeps self-propulsion functioning smoothly.
- Winter storage: Run the fuel tank dry or add stabilizer before storing for 3+ months. Drain carburetor or use carb cleaner spray.
These straightforward maintenance steps extend your mower's lifespan and keep it performing at peak efficiency.
Troubleshooting Common Issues
Won't start: Check fuel freshness, spark plug condition, and oil level. Prime the carburetor by pressing the fuel bulb 5–6 times before pulling the starter.
Uneven cutting: The blade is likely dull, bent, or worn. Sharpen or replace immediately. Uneven cuts indicate blade problems, not engine issues.
Self-propulsion not engaging: Check the drive lever—ensure it's fully engaged. Inspect the drive belt for cracks or slippage. A loose or worn belt requires replacement.
Excessive vibration: A bent blade, loose bolts, or a misaligned deck cause this. Check the blade first (most common cause), then tighten all fasteners.
Poor mulching results: Mulching works best on dry, short grass. Damp or tall grass clogs the deck. Cut when grass is dry and adjust to a higher height (55–65mm) before mulching tall growth.
Frequently Asked Questions
Frequently Asked Questions
Want to Compare More Gas Mowers?
Explore our complete gas lawn mower buying guide with side-by-side comparisons, expert tips, and recommendations for every garden size and budget.
View Full Buying Guide →