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90 hp Yamaha help please

20056 Views 8 Replies 4 Participants Last post by  Too much junk
My 04 90 hp yamaha is running low water pressure. At 5000 rpm it has about 15 lbs of pressure. At idle almost none. The pisser stream is weak at all ranges. Does this motor have a water bypass? Someone told me that it can get a grain of sand in it and wont close causing this. I would appreciate any help please. Casey
Had impeller change last year
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The standard old rule from dealers was Each year for inshore and every 2 years for offshore. The thinking is you will suck a lot more sediment up inshore with being in the shallows.

Thermostat, Pop-it valve and "COMPLETE" water pump kit ....Not just a impeller.
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