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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Runleader Digital Tach Hour Meter Engine Temperature Gauge RL-HM035A-TS002

Product ID: 367284650

Details

Brand
Runleader
Item dimensions L x W x H
37 millimeters
Item weight
60 Grams
Material
Plastic

⏱️Tracks up to 999.99 hours total & job time

⚙️Real-time RPM up to 25,000 with alert

🌡️Monitors engine temp -20°C to 300°C with alert

A$75

Duties & taxes included

In stock

Sold byAmazon AustraliaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⏱️ Stay ahead of engine wear — track, alert, and maintain like a pro!

ADAPTIVE BACKLIGHT MODES - Green and red backlights with automatic, always-on, or manual activation ensure visibility and instant alert recognition day or night.
DYNAMIC RPM MONITORING ALERTS - Real-time RPM display with customizable alert thresholds and max RPM recall to optimize engine performance.
PRECISION ENGINE RUNTIME TRACKING - Accurately logs total and job hours with programmable initial hours for seamless engine replacements.
COMPREHENSIVE TEMPERATURE SURVEILLANCE - Continuous current and max engine temperature readouts with overheat warnings to prevent costly damage.
RUGGED EASY INSTALLATION MAINTENANCE - Waterproof IP67 design, one-wire spark plug connection, replaceable battery, and versatile mounting options for hassle-free setup.

The Runleader RL-HM035A-TS002 is a compact, waterproof digital tachometer and hour meter designed for gas engines. It precisely tracks total and job hours up to 999.99, monitors real-time RPM up to 25,000 with programmable alerts, and continuously measures engine temperature from -20°C to 300°C with overheat warnings. Featuring adaptive backlighting and a replaceable battery, it ensures reliable performance and easy maintenance for professionals who demand engine longevity and peak performance.

Specifications

ASIN	B092CDSQ33
Best Sellers Rank	#48,131 in Automotive ( See Top 100 in Automotive ) #15 in Car Electrical Hour Meter
Brand Name	Runleader
Customer Reviews	4.0 4.0 out of 5 stars (997)
Item Dimensions	37 millimeters
Item Highlight	Alert RPM & Temp,Backlights Display,For Lawn Tractor Compressor Generator,For Snowmobile Marine Jet Ski,For Pit Bike
Item Weight	60 Grams
Manufacturer	Ningbo Jiangbei Run Leader Electronics Co., Ltd
Material Type	Plastic
Model	RL-HM035A
Number of Items	1
Part Number	RL-HM035A
Thread Style	Spark Plug Wire Wrap (One-wire)
UPC	723093900728

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