Ok for the last two trips out my boat has taken on a lot of water. There is a line that is capped on the raw sea water pump and the cap keeps blowing off. The original one blew to pieces and I found a replacement cap that seemed to fit at a hardware store and re capped it. I took it out and after a few minutes and did the same thing. Do I need to order the oem one offline or is there another problem that's causing excessive pressure to blow the caps to pieces? Ill also add this just started happening after the water pump took a crap out in the water and the boat overheated and warped the head. We just got the boat back a few months ago from the mechanic after thousands of dollars in repairs. I'm not sure if this problem is related. I also want to know why there's a second line there that's not used? What is it even there for? Anything that can help is appreciated to help avoid going back to the mechanic for costly repairs again.
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