engines sucked a lot of mud...

[phatdaddy]

I like to wade fish the flats and tend to bump bottom a lot getting to them. I installed a temp gauge and a water pressure gauge. I,ve noticed that after I stir the bottom I can loose as much as 3 or 4 psi @ 4000rpm. A local tech told me that anything over 10 psi @ 4000rpm is acceptable(Mariner 150,carb.). I put a new pump kit in every year or when the psi drops, which ever comes first. Macojoe's right all you can do is go run it, but don't just look at the pee stream, mine looks the same at 6psi and 12 psi, this is why I put the gauge in.