Innova 3612 Compression Tester - 4 Piece Kit

Works well with lawnmower

The beer drinking shop guy on YouTube mentioned the Schrader valve when testing small engines. He's right. I trust readings on this affordable tool.

This compression tester works good and is easy to read. and has a pressure release valve that is nice so you can release the pressure without unscrewing from the cylindar head. This also has a gauge on it thatll tell you if the comression is acceptable or if it needs work. of corse you should check with your engine specs to see exactly how much compression your engine should have but just as a quick reference just to give you an idea if the motor is even worth messing with, the red/green gauge on compression is great. i bought this for working on small engines such as for riding mower and it works great. The only thing that i dont like is that it didnt come with any type of case to put it in. This isnt something that most people will use every day and it would be nice if i came with some type of case so it doesnt get damaged rattling in the toolbox. but i just went on here and bought a padded handgun case and that worked great to store it in.

Solid compression tester. Comes with everything you need, and not a bunch of stuff that you really don't. Most importantly, has a Schrader valve so can use it for small engines (chainsaws, weed trimmers, etc.) or larger engines equally as well.

Worked well

seems pretty accurate. easy to use

I used it once on my Ford F-150. Works as it should, same an most other compression tool. The gauge has a release button to release the pressure. Now I know my truck's compression is great.

As others stated the needle on my dial gauge was tucked on the wrong side of the pin so it could not move up the gauge. The bezel(clear plastic cover) on the gauge has a notch that you can use to pop the cover off. Then just carefully lift and move the needle over the stop pin with your fingernail. Works now and the brass quick release coupling does not leak like the different brand I purchased did. The one in a lime green case.