Compression Tester Adapter Fits Yanmar Marine Engines 2QM20 , 3QM30 YM1810 Be sure to check out

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Wiring diagrams

For that information you will need the Yanmar Service Manual which we also carry

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Compression Tester Adapter Fits Yanmar Marine Engines 2QM20 , 3QM30 YM1810 Be sure to check outCompression Tester Adapter This adapter is proudly MADE IN USA and includes an integrated check valve inside the adapter to hold the pressure and allow you to easily see your engine's maximum compression. This listing also includes a quick disconnect coupling set to let you easily attach your own compression tester gauge. If you do not already have a compression tester gauge please consider our gauge kit in the link below. How To Use: Click Here For