Re: 15hp exhaust & water leak…why?

[Don]

So the cooling system is OK then? And yes, the early 9.9/15s don’t show a lot of water coming from that relief hole, especially at idle, more of a fine spray. They do seem to expel more water out of there at higher speeds like you mentioned though. I’m guessing this is because the exhaust housing fills with water due to more volume/pressure from the water pump at higher speeds, the excess blows out of that relief hole.