Today I tested the compression for both cylinders. I have not done this previously so I was curious about the results. I did the test when the engine was cold and throttle was set to high idle position. The compression was a little above 130 PSI for both cylinders.
I don't have the service manual so I don't know where it should be, at least this is not a low value which is good. My outboard model is after all Selva 40, the 40 XS and 50 models have different engine heads so they might have even higher compression.
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