So I rekitted my water pump. I noticed one strange thing in the kit and that was that the long, branched seal that goes into the plastic pump housing round the cup seemed like a loose fit compared to the old one. I went with it anyhow and got outboard back together. It pumps great a heap of water comes out the pee tube but water also comes out of the relief hole about 1/2 way up the leg so there must be a seal issue? What's the most likely cause of the leak?