Hardline Products USA Digital Hour Meter & Tachometer – OEM Replacement for Toro - MTD - Cub Cadet - Bad Boy - Troy Built - Briggs and Stratton– Waterproof Inductive Maintenance Gauge – N310

What It Is

An inductive digital hour meter and tachometer combo that tracks engine runtime (for maintenance intervals) and RPM (for optimal blade engagement and idle speed). Designed for commercial and residential zero-turn mowers, lawn tractors, and walk-behinds from Toro, MTD, Cub Cadet, Bad Boy, Troy-Bilt, and Briggs & Stratton—no wiring required.

Fitment & Compatibility

• Brands confirmed: Toro, MTD, Cub Cadet, Bad Boy, Troy-Bilt, and any engine with a spark plug wire (Briggs & Stratton, Kohler, Kawasaki, Honda).
• What to check before buying:
  • Spark plug wire access: The sensor wraps around the spark plug wire—make sure you can reach it without removing shrouds or engine covers.
  • Mounting surface: Needs a flat, clean metal or plastic area for the adhesive pad. Avoid painted/rusty surfaces; clean with alcohol first.
  • OEM vs aftermarket: This is a direct replacement for OEM meters on the brands listed (e.g., Toro 119-0235, Cub Cadet 925-04196). It’s not brand-specific—works on any gas engine with a spark plug.
  • Physical size: 2.1” x 1.5” x 0.7”. Ensure clearance on your dash or console.

Key Things to Know

• Installation difficulty: Very easy—wrap the inductive pickup around the spark plug wire, mount the meter with the included adhesive pad, and it’s live. No battery connection needed.
• Waterproof rating: IP65 (dust-tight and protected against low-pressure water jets). Fine for rain and hose washes, but don’t submerge.
• Display lag: LCD updates every 2–3 seconds for RPM. Fine for setup and monitoring, but not for real-time tuning.
• Common gotcha: The meter resets if disconnected from the spark plug wire for more than a few seconds. Write down your total hours before removing it.

Should You Buy It

Yes, if you want a cheap, no-wire way to track engine hours for oil changes, filter swaps, or blade sharpening, and you need a quick RPM check for idle or blade speed. It’s ideal for DIY owners of mid-range to premium mowers (Cub Cadet, Toro, Bad Boy) who don’t want to splice into wiring. Skip it if you need a tach for precise governor adjustments—the slow refresh makes that frustrating.