Rotary Digital Engine Tachometer Replaces Echo 99051130017

This is a must have if you work with small engines. I was finally able to fine tune an old Tecumseh-powered snow-blower that I've had for years. Works just as it should. It tells me the current RPM accurately. It's more sensitive when connected with the wire but just as good when the unit is hovering close to the ignition wire.

Great for setting the idle speed on a small engine.

Great tach! I am recently retired and beginning to service small engines to keep busy. This tach is outstanding. Allows me to properly set idle and max speeds on 2 and 4 stroke motors quickly, accurately, and with great reliability! If you're in the market - get this tach!

This was used to tune up a number of chainsaws and a couple of trimmers. I saw this sort of unit used on a YouTube video, was unaware there was anything like it out there. It can be used free standing, holding next to a spark plug or there's a clip-on antenna wire for the spark plug wire, we used that mode since we needed hands free to adjust the carb needles. It has a couple of modes, one for cylinder one on two cycles and 4 cycles and one for cylinder two for same. Cylinder one has the widest rpm range. Had no twin engines to tune, used the first mode and the unit sat on the bench. Managed to rev one chainsaw up to 15K, that's excessive and turned it back to 12K. Started out at 8K and my b-in-l said it was bogging down when at open throttle. Way better than just a calibrated ear. The needle tweak was almost imperceptible. All units drained and hung up for the winter after tuning. Marked down one star for not having a readily replaceable battery. Case is well-screwed shut. Probably soldered down. I can deal with that when the time comes. Has rudimentary instructions with it, those plus YouTube videos are all that's needed to use. This replaces a genuine Echo part number about $50 more and out of stock. There is no case, I used a cheap plastic pencil box from WalMart to store this and the set of carb diddle sticks I got from Amazon. Those are much better than trying to jam a screwdriver into the needle slots, recommended to get, were cheap. Nice having the tools for the job.

Did an engine swap and wanted to check engine RPM based on throttle cable. This thing worked great with and without the wire. just held the tachometer nice and close to the spark plug, and gave a clear readout with minor fluctuations.

Bough this tach as a recommendation from Chickanic and I can tell you it’s been a game changer in my shop. My helper thinks its the best thing since sliced bread.

Saw an unsolicited review on YouTube by Chickanic. Item measures RPM accurately and updates quickly. Very simple to use. Although the battery is soldered in place as others have mentioned, Lithium button cell batteries are available with solder tabs for those who are so inclined to replace their own. Available right here on Amazon, in fact.

So far so good, it works very good for the small engine repair work that I do.

It works as advertised

Works well. I had to make a little label to allow me to remember the right settings for 2- and 4-cycle engines.

Happy with tachometer , but they should have made it easier to change the battery, they soldered the battery in, not sure what battery is needed to replace it, also for the money I paid for it, should of come with a case for it, it was a bit pricey, 119.99 Canadian and 25.80 for shipping and when I got it from the US they said I had to pay another 18.21, should of let me know I had to pay more when ordering from the USA. I didn’t take the plastic off the screen yet so the screen looks a little weird.

Quit working after a few months of use. Now it only reads 3000rpm whether an engine is idling or at full speed.