Quick Cylinder Compression Tester Kit 0-300 Psi - Engine Diagnostic Tool

Thinking your engine might be losing some compression?

This handy little tool from AJ lets you check it out quickly.

It reads from 0 to 300 psi, so it covers most gas engines just fine.

The gauge seems solid and it’s a great thing to have in the toolbox for diagnosing why that engine’s running rough or lacking power.

It’s a brand new kit, so all the parts should be there and ready to go.

Made in China, but these testers are pretty straightforward and get the job done.

Much cheaper than a trip to the mechanic just for a diagnosis.

Pull the plugs, screw this in, and see what’s happening in those cylinders.