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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Digital Tach Hour Meter Engine Temperature Gauge RL-HM035A-TS002 | Alert RPM & Temp,Backlights Display,For Lawn Tractor Compressor Generator,For Snowmobile Marine Jet Ski,For Pit Bike

Product ID: 318290599

Details

Brand
Runleader
Item Weight
60 g
Item dimensions L x W x H
1.46 inches
Material
Plastic
Number of Items
1

⏱️0-999,99 hrs TOT & JOB tracking

⚙️0-25,000 RPM real-time & alert

🌡️-20°C to 300°C engine temp monitoring

41545CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Stay ahead of engine wear with smart monitoring that never sleeps!

ADAPTIVE BACKLIGHT MODES - Green and red backlights with always-on, auto, or manual modes ensure visibility and instant alert recognition day or night.
ROBUST EASY INSTALLATION - Water and shock-resistant design with versatile mounting options and simple one-wire spark plug connection for quick setup.
DYNAMIC RPM MONITORING ALERTS - Real-time RPM display with customizable firing patterns and alert system to prevent engine over-revving.
COMPREHENSIVE TEMPERATURE CONTROL - Keep your engine safe with continuous temperature readouts and high-temp alerts, switchable between °C and °F.
PRECISION ENGINE RUNTIME TRACKING - Monitor total and job hours with programmable previous hours for seamless maintenance scheduling.

The RL-HM035A-TS002 by Runleader is a compact, durable digital tachometer and engine temperature gauge designed for precise tracking of engine hours, RPM, and temperature. Featuring programmable hour counters, real-time RPM alerts up to 25,000 RPM, and temperature monitoring from -20°C to 300°C, it ensures proactive maintenance. Its adaptive backlight system and easy one-wire installation make it ideal for lawn tractors, generators, marine vehicles, and more, delivering professional-grade engine management in a sleek, user-friendly package.

Specifications

ASIN	B092CDSQ33
Best Sellers Rank	#13,799 in Automotive ( See Top 100 in Automotive ) #3 in Automotive Tachometers
Brand Name	Runleader
Customer Reviews	4.0 4.0 out of 5 stars (1,231)
Item Dimensions	1.46 inches
Item Weight	60 g
Manufacturer	Ningbo Jiangbei Run Leader Electronics Co., Ltd
Material Type	Plastic
Model	RL-HM035A
Part Number	RL-HM035A
Thread Style	Spark Plug Wire Wrap (One-wire)
UPC	723093900728

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