(2003 yamaha 150hp efi vmax vx150)Problem...Only 0-2 psi on (New) water pressure gauge at idle,visual water stream is present on rear of motor,17-20psi at 4000-5500rpm.No overheating Yet!Rebuilt water pump to include plate,gasket,o/rings,impeller....Twice! Same problem....idle is 600/700...
