Jayron Digital LCD Tachometer Inductive Tach Hour Meter Display Max RPM Waterproof for Most Gas Engine Marine ATV Generator Lawn Tractor Motorcycle (red)
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Availability:
In Stock.
Arrives
Wednesday, Jul 30
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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:
Wednesday, Jul 30
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
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
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
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.
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Reviewed in the United States on December 18, 2024 by curtis snodgrass curtis snodgrass
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
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
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
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
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.
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Reviewed in the United States on March 19, 2025 by lawrence