What should the PSI be on an outboard compression test?
What should the PSI be on an outboard compression test? Results vary depending on whether the outboard is a Four-Stroke or a Two-Stroke. Good results for Four-Strokes should be 180-210 PSI, and Two-Strokes should be around 110-130 PSI. Here is everything that you need to know about outboard compression tests. How to do them and what the results mean for you! What Is A Compression Test? What causes a bad compression test on a Mercury 2 stroke? Even a small leak will result in a poorly performing powerhead as the fuel mixture will become lean causing the temperatures of the...