How do you connect it to read engine temperature?

Remove the spark plug. Place the copper washer over the threaded portion of the plug and screw the plug back into the cylinder head. Tighten the plug with the appropriate torque.

Does this work with 2-cylinder engines, or just singles?

It works with: 2 stroke: 1 cylinder / 2cylinder / 3cylinder 4stroke:1 cylinder / 2cylinder / 3cylinder / 4cylinder / 5cylinder / 6cylinder / 8cylinder /12cylinder/16cylinder 6 stroke:2 cylinder Some 4 stroke 1 cylinder engine is 1P1R,the setting is the same way as the 2 stroke 1 cylinder engine.

How long are the wires on the temperature sensor ring cables? Only the length of the tach wire is shown.

The length of probe sensor wire is 58.5cm(approx.23.03 inches)

How do I know which model to get? The connections look different.

we think your model is HM035A-TS003, the temp sensor can measure the engine temperature especially easy to put it into engine radiator.

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⏲️ Stay ahead of the grind—track, alert, and conquer every engine hour!

DURABLE USER FRIENDLY - Water and shock resistant with easy installation and long-lasting battery life for hassle-free operation.
UNIVERSAL COMPATIBILITY - Designed for lawn tractors, generators, snowmobiles, marine jets, and more—one device, endless applications.
VERSATILE BACKLIT DISPLAY - Green and red backlights ensure clear visibility and instant warnings, day or night.
PRECISION ENGINE MONITORING - Keep your machine’s runtime and RPM in sharp focus with real-time digital tracking.
PROACTIVE MAINTENANCE ALERTS - Never miss a service window with programmable hour and temperature alerts that protect your investment.

The Runleader Digital Tach Hour Meter is a compact, multi-functional engine monitor that tracks total and job hours, real-time RPM up to 25,000, and engine temperature from -20°C to 300°C. Featuring programmable alerts, a backlit LCD display with green and red lighting modes, and robust water and shock resistance, it’s engineered for diverse engines including lawn tractors, generators, snowmobiles, and marine vehicles. Easy to install with a one-wire connection and backed by 2 years of support, it empowers proactive maintenance and maximizes engine longevity.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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Brand	Runleader
Material	Plastic
Item dimensions L x W x H	1.46 inches
Item Weight	60 Grams
Screen Size	1.62 Inches
UPC	723093900728
Manufacturer	Ningbo Jiangbei Run Leader Electronics Co., Ltd
Item Weight	2.12 ounces
Item model number	RL-HM035A
Batteries	1 Lithium Metal batteries required. (included)
Manufacturer Part Number	RL-HM035A

Runleader Digital Tach Hour Meter,Engine Temperature Gauge,Alert RPM & Temp,Backlights Display for Lawn Tractor Compressor Generator Snowmobile Marine Jet Ski Pit Bike

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