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Jayron Digital LCD Tachometer Inductive Tach Hour Meter Display Max RPM Waterproof for Most Gas Engine Marine ATV Generator Lawn Tractor Motorcycle (red)

  • Based on 152 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Saturday, Jul 26
Order within 14 hours and 5 minutes
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Color: red


Features

  • HOUR METER----The total hour reading display range is 0 to 99999 H, 0.1/1H accuracy. There is also a resettable partial timer
  • TACHOMETER---- Measure the current RPM of the engine. When the engine turn on, the LCD displays the current RPM and the maximum RPM is 30000
  • INSTALLATION---- Easy to install, no wiring required, or connection with the enclosed hardware, this tachometer records gasoline engines total running hours and RPM by getting the induction from spark plug cable when engine starts.
  • RPM TYPE---- According to the gasoline engine with different power and speed range, there are 3 optional RPM types: 1P2R; 1P1R; 2P1R
  • OTHER ----100% epoxy sealed shell, waterproof, shockproof, waterproof grade: IP68; contains detailed users instructions; patents, CE ROHS certification; has two years after-sales guarantee

Brand: Jayron


Material: Plastic


Item Weight: 59 Grams


UPC:


Manufacturer: Jayron


Manufacturer: ‎Jayron


Brand: ‎Jayron


Item Weight: ‎2.08 ounces


Item model number: ‎RL-HM016R


Batteries: ‎1 Lithium Metal batteries required. (included)


Manufacturer Part Number: ‎RL-HM016R


Date First Available: December 16, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jul 26

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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Top Amazon Reviews


  • Phenomenal performance!!!!!
Color: orange
Works perfectly. Made 10 wraps around spark plug cable, fired the blower up and worked right away. Very impressed. Stable readings after 1 second delay. Idle At 2200rpm and full throttle was 5900-6000 epms.
Reviewed in the United States on March 11, 2025 by APM

  • Tuning chainsaws.
Color: orange
I got this specifically to tune the carbs on chainsaws. I've used it on dirt bikes also. Functions as it should. I kept the packaging because it has the instructions on it and I don't use it every day so I forget.
Reviewed in the United States on March 9, 2025 by Chris from Oregon

  • It works as described, but instructions would be great!
Color: orange
So first of all the product does indeed work as described but the instructions are not all that great. If you continue to hit the set button there are 3 main settings. On the package there are instructions but they are vague. I have discovered that when you repeatedly hit the set button, you are left with 3 options and what they do; P=Pulse/R=Revolutions, (1P1R/1P2R/2P1R). Which is used for the difference between [2 cycle 1 cylinder~1P1R] , small engines with 2 cylinders that share one coil which sparks twice per revolution. "example v-twin/flat twin (opposing cylinder twin) engines"/[4 stroke, 2 cylinder 1 coil engines~2P1R] , and lastly any 4 stroke engine that has one coil per cylinder and only sparks once per 2 revolutions~1P2R]. So essentialy and simplified in MOST cases it would look like this. 2 stroke, 1 coil = 1P1R 4 stroke, 1cyl, 1 coil/magneto = 1P1R 4 stroke w/stater, points, 12v coil = 1P2R 4 stroke, multiple cyls, 1coil per cyl=1P2R 4 stroke, 2 cyl 1 coil = 2P1R 2 stroke, 2 cyl 1 coil = 2P1R So to achieve the correct actual rpm, you must make sure it's seeing how many actual pulses are being supplied by the coil you are reading the rpms from. I hope this helps with the main settings and getting an accurate reading for the engine you're using this on. Once it is set one time for the engine you are using it on, it it's only used on that engine and or engines or the like, it will save its last setting. Which is nice for tuning a chainsaw, bike, car, go cart, ect... Other than the poor instructions, I feel it's very close to accurate based off using a scan tool and reading actual data on a car engine and comparing it to this device it was withing 5 rpms! I feel that's pretty impressive for how cheap this is. ... show more
Reviewed in the United States on December 18, 2024 by curtis snodgrass curtis snodgrass

  • Sweet little digi tach
Color: orange
Needed an RPM reference to tune a 2 stroke. Works great. Super easy. Recommend using the wire so you have 2 hands free to do the tuning.
Reviewed in the United States on July 24, 2024 by Buyer

  • Junk dont buy
Color: orange
Does not read accurate at all sais 22000 rpm when its realy around 3800rpm complete Chinese junk
Reviewed in the United States on May 22, 2025 by Bob roberts

  • Just Hold up to spark plug Wire!
Color: red
Literally just hold up to your spark plug wire for instant rpm read. I use this to tune my mowers, tractors and other small engine equipment. Really cool little useful gadget.
Reviewed in the United States on November 20, 2023 by Dan Terninko

  • digital tachometer
Color: orange
nicely made an worked as stated, used on my lawn mower an chain saw to set the correct rpms.
Reviewed in the United States on November 5, 2023 by Amazon Customer

  • Close but no cigar
Color: red
This maybe useful as an hour meter. But, the tachometer has limitations. First, the refresh rate is really low. So, you have to wait quite a while to get your reading. The other problem it's really frustrating is that the maximum rpm is not resettable. That makes it very limited for use as a tuning device. ... show more
Reviewed in the United States on March 19, 2025 by lawrence

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