VEVOR Compression Tester Adapter Kit, 9 Pcs Automotive Engine Cylinder Leak Down Compression Test, Accurate Dual Scale Pressure Gauge 0-300 psi, with Long Reach Hoses and Case for Engine Cylinders

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Most compression gauges have the Shrader valve located in the gauge itself. This causes an extremely inaccurate reading on small engines. This gauge correctly has the valves located in each of the adapter allowing you to accurately test small engines. ie scooters, lawn mowers, motorcycles, 4 wheelers and go-karts in addition to automotive engines. Plus the kit comes with spare valves.

I purchased this compression tester to check each cylinder on an old truck. The price was reasonable and the attachments were definitely a plus. This tester saved me thousands of dollars in properly diagnosed cylinder issues. I used on the truck, zero turn mower and Dirt Bike. Bike is a must so I will be able to monitor PSI and know when a top end is needed. Great tool, easy to use and money saver. I would buy it again.

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Edit: I'm downgrading my review from 3 to 2 stars based on my experience with this company. I asked them to replace one of the attachments that had defective threads. They sent the wrong itemI contacted them regarding the problem and never heard back. So, I'm guessing their policy is one warranty claim, even if they replace the wrong item.I purchased this gauge to replace a snap-on gauge that was recently stolen from my garage. Upon 1st use, it let me down. The quality of the threads on the 14mm hose extension are poorly machined. I had problems threading the adapter in to The spark plug openings. I contacted the company and they offered to ship a new one. If I don't receive it in the 30 day return window, this set is going back. Only redeeming quality is the quick connector fits my snap-on extensions, which the thieves didn't steal.