Is 90 Psi A Good Compression?

Is 90 Psi A Good Compression? Generally, readings below 90 PSI for modern two-stroke outboards indicate a problem; most will produce cranking compression readings in the 90 to 105 PSI range, depending on the engine year, make, and model. What is a good compression PSI? A compression test reveals the condition of your engine’s valves, … Continue reading Is 90 Psi A Good Compression?