I'm in the process of buying a used boat with a 99 Honda 50 HP 4 stroke OB. I asked the selling shop to do a compression test before I sealed the deal. The salesman said the test showed 75 psi in all three cyl. I was surprised as I thought this pressure sounded very low. He said that 75 was normal in the smaller OB's like the 50 HP. I have tested compression on a 50 HP Johnson and it was in the 125psi range so I'm not sure if this should be a red flag? Any thoughts would be appreciated.