Picked up BE Pressure washer with water leak

Hello All,
New to the forums picked up a BE pressure washer used with Honda GX 390 and Comet ZWD 4040 pump. Came with nothing got a hose and gun and pressure seems good, need to get a pressure gauge to check. But when i connect the hose to the pump even with out it running water starts to run out of the bottom of the pump. Its coming from between the oil section and the water section. When it is running the water continues to come out at the same pace but as I said seems to have great pressure. So the question is can it be used as is for a little to wash my boat and what should I look to replace during the winter if it can wait? Water seal Kit?
Thank you,
Attila