I picked this up to replace the tired compression tester I have been using for years. I did a lot of rebuilding waverunners and riding lawnmowers, both of which have their own quirks, but I would have loved to have the adapters and flexibility that this one has. I tried it out on my John Deere tractor which is only a couple years old, so I new that it would have good compression. It took a little adapting, but I managed to use it to check the compression on that engine. The compression came in around 98-99 which is close enough to the 100psi I was expecting. The kit comes with schrader valves which leads me to believe I could use it for testing the fuel rail on cars, though I haven't tried it yet. I have a good tester for that, but it is nice to have this as a backup. Overall, a nice compression kit that seems to work well.
Randy Newman 
