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,Alert RPM & Temp,Backlights Display for Lawn Tractor Compressor Generator Snowmobile Marine Jet Ski Pit Bike

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

Product ID: 367284650

Details

Brand
Runleader
Item dimensions L x W x H
37 millimeters
Item weight
60 Grams
Material
Plastic
Thread type
Spark Plug

⏱️999.99 hrs runtime tracking

⚙️0-25,000 RPM precision

🌡️-20°C to 300°C temp range

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Description

⏳ Keep your engine in check, or risk falling behind! 🚀

RUGGED READY - Waterproof IP67 design with easy one-wire install and replaceable battery for hassle-free durability.
REAL TIME RPM ALERTS - Stay ahead with programmable RPM alerts and max RPM recall for optimal engine performance.
PRECISION ENGINE MONITORING - Track total & job hours with 0.1 hr accuracy to never miss maintenance windows.
ADVANCED TEMPERATURE CONTROL - Monitor current & max engine temps with overheat alerts to protect your investment.
NIGHT READY BACKLIGHT DISPLAY - Green & red backlights ensure clear visibility and instant warnings even in low light.

The Runleader RL-HM035A is a compact, waterproof digital tach hour meter designed for gas engines up to 25,000 RPM. It accurately tracks total and job hours with programmable maintenance alerts, monitors engine temperature with overheat warnings, and features a dual-color backlit LCD for clear visibility day or night. Its rugged design includes a replaceable battery and versatile mounting options, making it ideal for lawn tractors, generators, marine vehicles, and more.

Reviews

E**G

Habe das Ding auf einen 3 Zylinder Außenborder funktioniert tadellos

29.08.2024

L**T

Installé sur une moto custom ancienne sans compte tours ,le compte tours bloque a environ 1700t/mn .J'ai essayé plusieurs étalonnages du compte tours mais c'est compliqué avec une notice sans français Le thermomètre fonctionne bien Point positif pas besoin d'alimentation électrique à prendre sur la moto.

27.12.2025

B**K

great for monitoring temps & rmp also records operating hours

22.06.2025

F**D

Easy to install, but not working well it's reset everytime

14.10.2025

G**A

Le produit est plutôt sympa mais impossible de faire fonctionner la température moteur. Le boîtier indique erreur à l'écran. Bon à la base je le voulais surtout pour le compte tour donc je fais sans.

19.03.2026

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€ 80.62

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In stock

Sold byAmazon LuxembourgDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Luxembourg.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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

2 days ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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ASIN	B092CDSQ33
Best Sellers Rank	#74,299 in Automotive ( See Top 100 in Automotive ) #28 in Car Electrical Hour Meter
Brand Name	Runleader
Customer Reviews	4.0 4.0 out of 5 stars (1,085)
Item Dimensions	37 millimeters
Item Weight	60 Grams
Manufacturer	Ningbo Jiangbei Run Leader Electronics Co., Ltd
Material Type	Plastic
UPC	723093900728

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

Details

Details

Description

Specifications

Reviews

Common Questions