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 Water Oil Temperature Gauge,Alert RPM & Temp,Backlights Display for Lawn Tractor Compressor Generator Snowmobile Marine Jet Ski Pit Bike (RL-HM035A-TS001)

Product ID: 448748324

Details

Brand
Runleader
Item weight
60 Grams
Material
Plastic Glass
Number of Items
1
Unit count
1 Count

⏱️999.99 hrs runtime tracking

⚙️0-25,000 RPM precision

🌡️-20°C to 300°C temp range

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MOP$479

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Sold byAmazon MacauDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Stay ahead of engine wear with smart alerts and precision tracking!

RUGGED READY - Waterproof IP67 design with shock resistance and easy installation for all your outdoor power equipment.
DYNAMIC RPM ALERTS - Real-time RPM readout with programmable alerts up to 25,000 RPM keeps your engine performance optimized.
NIGHT READY BACKLIT DISPLAY - Green and red backlights ensure clear visibility and instant warnings even in low-light conditions.
PRECISION ENGINE MONITORING - Track total & job hours with 0.1 hr accuracy to never miss a maintenance window.
COMPREHENSIVE TEMPERATURE CONTROL - Monitor oil, water, and coolant temps with overheat alerts to protect your engine’s health.

The Runleader RL-HM035A is a multi-functional digital tach hour meter designed for gas engines, offering precise tracking of total and job hours, real-time RPM monitoring up to 25,000 RPM, and temperature measurement for oil, water, and coolant. Featuring programmable maintenance alerts, a backlit LCD for night use, and a rugged waterproof IP67 design, it ensures optimal engine performance and longevity across lawn tractors, generators, snowmobiles, and more.

Specifications

ASIN	B0B24FFJMQ
Best Sellers Rank	#206,617 in Automotive ( See Top 100 in Automotive ) #74 in Automotive Tachometers
Brand Name	Runleader
Customer Reviews	4.1 4.1 out of 5 stars (32)
Item Weight	60 Grams
Manufacturer	Ningbo Jiangbei Run Leader Electronics Co., Ltd
Material Type	Plastic Glass Metal
Model	RL-HM035A-TS001
Part Number	HM035A
Unit Count	1 Count

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