Runleader Digital Hour Meter Tachometer, Maintenance Reminder, Battery Replaceable, Automatically shutdown, Use for ZTR Lawn Mower Tractor Generator Marine Snowmobile.

I use these for small engines primarily, and purchased this one to verify and maybe adjust te governor speed on my snowblower. Rated speed is 3600 RPM, and it's tough to get my mechanical shaft-end tach to the drive end of the crank without taking guards off and exposing the spinning bits. Plus the mechanical tach doesn't offer continuous readings; you push the button, and the needle swings up for a couple seconds then stops. Great for adjusting machine speeds, but not nearly as handy as this one with continuous speed readings.I did add a battery charger clamp to the end of the cable, so I could use it as a portable diagnostic tool rather than mounted as a ride-along tach. Just pushed cable down one leg, bent it over the spring where it pivots open/closed, then back up the other leg of the little clamp. Gently squeezed the tabs to hold the wire in place without crushing it. Just place the charge clamp around the plug wire, and it reads perfectly. No need to wrap the sense wire around the plug wire 6x as the instructions suggest.How did the snowblower governor project go? Governor was set for about 3300 RPM, and a little linkage adjustment on the LCT snowblower engine brought that up to about 3650 RPM. Does it throw 10% more snow 10% farther? Here's hoping! I had most of the snow cleared (six neighborhood driveways plus about 5000 square feet of our private street...) before I did the first measurement, and I finished that work before I pulled engine covers off to adjust anything. We're getting sleet and some snow tonight on top of the melt-off and rain from yesterday and last night, so it's more like fused snow on skating-rink ice underneath. Low 20's overnight tonight. Not enough snow to deserve the snowblower, and way too slippery underneath to do much even if there was a bunch more snow.Conclusion: I'd buy this tach again in a heartbeat. Has replaceable battery, compact packaging, and for my use it's the perfect solution at a very reasonable price. For well under $20, I can add it to my tool-a-holic collection with no guilt whatsoever.

Bought 1 impressed enough, bought 2 more. Log splitter & 2 mowers. RPM may not be exact, but gives a good idea of how fast. Hour meter is nice. Make sure you read the instructions for how many cylinders on your engine and make sure to wrap the plug wire correctly. have over 2000 hours on one, have yet to need a battery.

a bit inconsistent, and hard to adjust, but it does a good job for the price. i dont know why there is a 4 and a 2 stroke mode, considering the magnet passes the coil every 360 degrees of rotation, and it sparks every time that happens. if you dont know what your rpm is, its hard to verify the acuracy of this. i was lucky enough to have a laser style tachometer to verify its readings

Installed this on my Toro Timemaster. Attached to the plastic crossmember on the mower handle. Couldn't get the hour meter to work correctly but I was only interested in the RPM gauge so I wasn't too concerned. Overall nice product.

I was a little scared when I first put in the battery and went to test out the tach and nothing happened. Read the paper and said to hold down the S1 & S2 buttons to initialize the tach and then it worked great. I'm using it to tune the carb and adjust the max rpm and for $10 it's working great. Purchased my last two on the auction site for nearly $20 each and while they are probably a little nicer, they aren't twice as nice!Update:Got a second one and stuck it on the predator engine on my pressure washer. Mounted it to the top of the air filter box with a couple short screws. Then I adjusted the engine max rpm to around 3900 from the stock 3600 area. That really helps with the 3100 psi pump on there and boosted the running psi by a few hundred. The tach worked fine for the two hours I ran the thing the other day. I'll pick up a few more as I'd like to have one that's NOT mounted on an engine so I can check RPM on other things like my chainsaws.

Garbage. Not water resistant. Worked for 1 day properly. I put it on my 4stroke outboard. Went camping and fishing. Worked first day. Sat on the console of my boat overnight. It did not rain at all, I know I was in a tent. The dew that gathered in the morning was more than this junk could handle. Display filled with condensation, became unreadable and failed the following day. Might work for a weedwacker in the desert but otherwise junk.

Wanted something compact enough to install on my small inverter generator but easy to read. This little jewel fit my needs for a very good price. Easy install, I used Gorilla double stick tape for mounting. Input wire just wraps a few times around the spark plug wire and stays put with small zip tie which was provided. Works great and keeps track of service intervals. RPM's are great for monitoring state of tune, happy with purchase...