RL-HM011G Digital Hours Tachometer with Maintenance Reminder

Great product, easy to install and works really well!

Not sure how accurate the rpms are but it works perfect for keeping up with hours

Cheap, but im not so sure accurate. Even when set for the application still reads high on rpms. Otherwise perfect!

I hooked these up to my two lawn mowers and ran them all this past summer. They worked perfectly displaying the RPMs and the total hours run. In the past I really lost track of how many hours the mowers were being run. This is really helpful. I have removed the batteries and put the mowers away for the year. They were very easy to install and having a replaceable battery is something that I'm sure will ensure they last. Well worth the money

I only wanted an hour meter so it works for me. The tach function might work on larger engines but on small single cylinder engines it is only accurate within plus or minus five or six thousand rpm. Also, when the engine is running you can only see the wildly inaccurate tachometer function not the hours.

They work great and last!

Bought for a brand new Yamaha SuperJet but doesn’t work because it has coil packs and there’s no way to wrap the wire. Turns out I needed one for our 1989 WaveRunner because the last runleader hour meter got submerged in water for too long. Works great for keeping hours and watching the rpms. The 1989 is carbureted. You have to know the rpms to adjust the carb. I have runleader digital tachs on multiple motorcycles. I have one that also has a temp probe for water temp on a BMW motorcycle.

Initially rated product highly as it worked out of the box. After sitting under a cover in a boat protected out of the sun, the tach apparently became intruded with water and will no longer function. Although it wasn’t I expensive, I didn’t expect it to be disposable. Something intended for a marine environment should probably be less susceptible to moisture, I’d think.

It's a nice little thing that works very well. Easy to use and install. But I still have a little question for the manufacturer: What is wrong with you? That inductive cable is way too short! Obviously, this device is very useful in marine applications, as an add-on for the outboards who does not have a tachometer. However, the best/safest (rain-free) place for installing it is somewhere on the transom or near the boat commands. For transom installation, the cable should be at least 10 feet long, to easily allow steering and tilting. For installation near the boat commands, the cable should be like 20 feet. The most commonly used cables for acceleration have 20 feet. Boaters would like to strap this inductive wire on the acceleration cable ( follow the same route ). I gave 5 stars because I knew the cable is short from the beginning. It's not like I have been tricked. I had to hide the device inside the junction box, where I cannot see it without rising the lid. Still good for diagnostic and maintenance schedules.

La batería no dura mucho. Su instalación es fácil.

Hours seem super accurate but can’t get the tach working but I don’t really care about that

I bought this just for checking and adjusting the running speeds on a snowblower engine that I was fixing up. Very easy to use if your read the instructions. At first it was displaying the RPMs at twice what it should have been so I changed the firing order configuration as suggested in the manual and it then displayed correctly. It has other features like tracking usage hours that are helpful if you permanently mount it to your machine but I don't need that. I have no way of verifying the accuracy of this device but I did try it several times and it consistently displayed the same results. This is a great tool for the price, even for a one time use.

This works very well and appears to be accurate. While it's supposed to have automatic off when not in use, this doesn't seem to work. After using it several times, I noticed hours later that it's still on. I have to press the 2 buttons together to force it to turn off. Other than that, it's good.