90 hp Yamaha help please

20068 Views 8 Replies 4 Participants Last post by Too much junk, Oct 2, 2012

Too much junk

Discussion Starter · Oct 2, 2012

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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Too much junk

Discussion Starter · #3 · Oct 2, 2012

Sorry didn't go into detail enough. This was a brand new factory lower unit installed July of 11 Thanks Casey

Too much junk

Discussion Starter · #5 · Oct 2, 2012

Where is the poppet valve located?

Too much junk

Discussion Starter · #7 · Oct 2, 2012

It is a 90 hp 2 stroke 3 cyl in line.

Too much junk

Discussion Starter · #9 · Oct 2, 2012

Thanks everyone for the info.

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