I have a 2003 f90 4stroke outboard. We noticed last weekend that there is nothing coming out of the telltail .New water pump beginning of the season and pumped great with a strong tell tail. I am thinking something is clogged because 2 weeks ago we were blown onto a sanbar hard and took awhile to get off of it. So I am assuming I sucked up a bunch of sand. The motor does not overheat and runs great but noting comes out of the telltail. Any ideas where to start? I heard that some of the Yamaha's have fuel and rectifier coolers that can clog. Is this true on my motor?