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NInE-ROnG has focused on product development and manufacturing in the fields of hour meter, battery indicator, multi-function meter，service for the garden machinery industry, outdoor power vehicle equipment, transportation vehicles.In addition, we are also committed to creating simple and practical day timers, night light, hygrometers and other products to add fun and security to our life.
PRODUCT FUNCTION
Hour Meter (TOT)
- Tracks the total number of hours the machine has been running.
- The total hours display range is 0-99999H with 0.1H/1H accuracy.
- TOT hours are non-resettable. Automatic clearing when exceeding the maximum value.
- The device is turned off, the total reading is retained, and the next cycle is accumulated directly.
JOB timer (PAr)
- Used to measure partial the work time,such as changing the oil.
- Display the partial running time of the engine by operating the button.
- PAr timer reading shows 0-99,999H,0.1H/1H accuracy.
- PAr timer can be reset.
Tachometer（RPM）
- Displays the current RPM of the engine during operation.
- The device stops working, recall maximum RPM.
- The maximum RPM is 30000RPM.
- Suitable for most types of gasoline engines:2 Stroke 1 cylinder/4 stroke 2 cylinder/4 stroke 1 cylinder//4 stroke 4 cylinder//2 stroke 2 cylinder(a small part,such as OHV engine).
Spark plug connection
Double-sided adhesive installation&Application
Buyer
2025-08-20 15:25:20
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.
Customer
2025-07-31 15:50:06
nicely made an worked as stated, used on my lawn mower an chain saw to set the correct rpms.
curtis snodgrass
2025-06-26 14:08:21
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 = 1P1R4 stroke, 1cyl, 1 coil/magneto = 1P1R4 stroke w/stater, points, 12v coil = 1P2R4 stroke, multiple cyls, 1coil per cyl=1P2R4 stroke, 2 cyl 1 coil = 2P1R2 stroke, 2 cyl 1 coil = 2P1RSo 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.
Colin
2025-06-17 16:30:53
Trying to use this for tuning chainsaws. On the low end, it seems to be off by 800 to 1200 rpm as far as i can tell. On the high end, wide open throttle, it shows numbers in the 3000s and occasionally will go up to numbers in the 6000s, when the chainsaws rpms are actually around 12,000. Really was trying to make this work since the price was right, but it doesnt feel reliable and the risk of damaging expensive saws is not worth it.
Dan Terninko
2025-06-04 17:06:42
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.
John Burris
2025-05-21 10:38:19
I bought this as a tool for maintaining small engines, it turns off when there is no signal and you can hold the square end up to the plug wire or spark plug boot and it wakes up and reads RPM very well, works great!
Mary Ziegler
2025-05-20 16:08:42
Used the tachometer 4 times so far on 2 stroke equipment. Appears to do what it is supposed to. I like that you don’t have to use the wire to get a reading. I hope it lasts longer than the cheaper black ones I’ve ordered from China. (This one is probably from China too) Lol
Cheryl Williams
2025-04-29 15:07:25
Didn't do what I wanted I didn't want to hookup wires to see rpm just wanted to hold and instruction would be nice.
Naydene Gibson
2025-04-26 14:58:29
exactly what was asked for
Customer
2025-03-30 16:03:03
The digital readings are so far out the product is unusable.
Client d'
2024-12-29 14:10:37
fonctionne a merveil bravo
Customer
2024-12-12 16:41:47
Instructions are hard to follow. I needed a RPM reader but all kids of numbers. Cannot figure it out.
Rob H.
2024-12-04 14:23:15
Wish I spent the extra money on a Tiny Tach instead of wasting it on this. Less than 3 months old, used three times so far and not giving accurate reading.
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