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Robot Lawn Mowers

Honda Miimo HRM310

Honda · Launched Apr 2009

An early entrant whose wire-guidance architecture became a liability as satellite navigation matured. Honda's exit reflects the category's direction, not a product failure.

Level II
Assisted Autonomy
1 sources reviewed ·
Ready Now
Ready to own today
Reassessed
Jun 11
View history
Robovations Score
Adequate · 51 of 100
Rescored 2026-06-11
Autonomy35 / 100

30% weight

Reliability55 / 100

25% weight

Maintenance50 / 100

15% weight

Value25 / 100

15% weight

Privacy95 / 100

15% weight

Framework

How we score →

Weighted average of 5 reads, 0–100. Scored from documented evidence — we do not lab-test.

Will the Honda Miimo HRM310 work on your yard?

Pick what matches your setup. The fit updates as you go.

Yard size
Terrain
Grass type
Boundary setup
How Honda Miimo HRM310 holds up
Yard size
Terrain
Grass type
Boundary setup
Specifications

The full spec sheet.

Manufacturer-published values.

Within the category, one of the shorter runtimes in the class and one of the shortest charge times tracked.

Positions are rank within the 66 robot lawn mowers in the Robovations database.

20.5 in23.6 inTOP9.8 in23.6 inSIDEDimensional drawing
Honda HRM310 · Released Apr 2009 · 19.8 lbs
This robot’s rank in categoryCategory median
Runtime60min50240 min
Charge time60min40360 min
Noise58dB5482 dB
Weight19.8lbs11.9160 lbs
Mapping & navigation

Boundary wire perimeter guidance with random-walk cutting pattern

Lifecycle

The record since launch.

2 tracked events since launch
20092010201120122013201420152016201720182019202020212022202320242025TODAY123
  1. 1
    RELEASE · APR 1, 2009First shipped
  2. 2
    NEWS · NOV 15, 2023Honda Miimo line exits North American dealer service network
  3. 3
    REASSESSED · MAR 10, 2025HRM310 readiness reclassified as wire-nav segment contracts and parts scarcity firms
Ownership & reliability

How it holds up after the purchase.

Owner reports · manufacturer documentation

Wire boundary system is robust; mechanical reliability was Honda-standard for the era; parts support and software updates are no longer available.

No major recalls documented during the product's active market period. Wire-guidance architecture has inherent reliability advantages (fewer sensors to fail). Post-discontinuation support means no firmware patches or driver updates for any issues.

Owner effort~45 minhands-on time per month
Consumables$60per year, replaceable parts
Reliability trendUnprovenowner-reported arc to date
What goes wrong, and who fixes it
Failure pointLikelihoodResolution
Blade wear and sharpness lossUneven cutting, scalping on slopes, increased motor loadCommonOwner fixManual blade replacement every 2-4 weeks depending on grass density and property size.
Boundary wire breaks or contact lossRobot exits perimeter or stops mid-session until wire is located and repairedOccasionalOwner fixWire continuity testing with a multimeter; re-burial or splicing required.
Dock charging contacts corrosionIntermittent charging failure, battery discharge between sessionsOccasionalOwner fixContact cleaning with fine grit or emery cloth after rain or seasonal use.
Motor burnout from overload on slopesComplete mobility loss until replacement motor obtainedOccasionalOwner fixParts no longer available from Honda; third-party replacement may be possible but not officially supported.
Maintenance cadence
Weekly52×a year

Inspect boundary wire for visible breaks or damage; clear grass clippings from deck.

Monthly12×a year

Clean dock charging contacts and verify docking success after each mowing cycle.

Seasonally4×a year

Winter storage requires battery removal and cool, dry storage; drain fuel if engine-powered variant used.

Yearly1×a year

Check wire loop continuity with multimeter; repair buried wire if intermittent contact detected.

As neededVariesno fixed cadence

Sharpen or replace blades as needed based on cutting quality; dull blades increase motor load.

Safety flags
CautionSpinning blade during automatic operationRobotic mowing occurs without human supervision. Blade contact risk for pet paws or loose debris approaching the unit.
NoteNo official support or replacement partsProduct discontinued; parts sourcing and repairs are DIY or aftermarket only.
Common questions

What buyers actually ask.

5 answered
Operation
Does the Honda Miimo HRM310 require a boundary wire to operate?
Yes. The wire must be installed in a loop at the yard perimeter and buried or secured at the surface. Installation takes 2-4 hours depending on yard size and perimeter shape. This is a fixed setup; virtual boundaries are not supported.
Operation
What is the battery runtime and can it cover a half-acre property in one charge?
Runtime is approximately 60 minutes per charge. A half-acre property takes one full charge to complete. Dock and recharge cycles are fully automatic.
Operation
What happens if the HRM310 crosses the boundary wire or gets stuck?
If the mower crosses the wire boundary, it stops autonomously when it detects the signal. Manual retrieval and repositioning inside the boundary is required. Self-righting or recovery is not automatic.
Ownership
Is the HRM310 still supported by Honda, and are replacement blades available?
Honda ceased US market support and manufacturing of the HRM310 in the early 2020s. Parts are increasingly difficult to source; third-party blade replacements may be available from aftermarket suppliers, but official support is not available.
Compatibility
Does it require an app or wireless connectivity to operate?
No. The Miimo operates entirely based on the boundary wire loop. No smartphone app, Wi-Fi, or Bluetooth connectivity is needed. Start and scheduling are mechanical controls only.

More in this category

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Husqvarna Automower 115HII
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Compact flat yards under 2,000 sqft, wire-based perimeter, seasonal-only operation
Verified63/100Capable
Husqvarna Automower 305II
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Husqvarna Automower 305

Mid-size wired yards 2,500-5,000 sqft, moderate slopes, established Husqvarna ecosystem users
Verified64/100Capable
Cite & embed

Reference the Honda Miimo HRM310 classification.

Embed the Autonomy Ladder™ mark or copy the citation. The mark links back to this assessment and updates if the classification changes.

RobovationsAutonomy Ladder™IIAssisted AutonomyIndependent classification
Citation
Where to next

Three ways to keep going.

For shoppers

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Open the compare builder pre-loaded with the Honda Miimo HRM310 and Trifo Lucy — side-by-side score, autonomy, fit profile, and trade-offs.

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By RobovationsUpdated: Jun 14, 2026
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