200 hpdi water pressure issue

[basshawg41]

i have a 2007 yamaha hpdi that the water has dropped to 15. I have brought to shop replaced impeller, cleaned pressure valve and blew out all lines including line and pressure gauge. I always ran between 20-25 at 4000 rpm's and all of a sudden barely get 15. The motor is on a 195vs ranger intercoastal that i do use in saltwater also. Any help will be greatly appreciated

[Sequoiha]

There is nothing wrong with 15 psi,, must be your guage, actually should only be about 18 at WOT with everything working properly..

[basshawg41]

Ok I'll change my gauge is it good to flush with some type of salt free

[Sequoiha]

its a personal preference, i live on the gulf coast and i always use salt away when i flush my engine..