Merc. 150 Xr-6 SN#OTO-65719
Just replace water pump impeller,plate lower and top gaskets. Before the the parts replacement every thing was fine except I felt water pressure at idle was a little low.(under 2 lbs. psi)
Now at idle I have sometimes 2 psi then sometimes 8-10 psi. If I bump up the throttle some it drops to 2 psi. and when on plane( before any trim 2psi.) ??? With some trim, pressure climbs to 8 psi.then stars bouncing around. Tell tail stream also seams a little erratic at idle also.
I have changes dozens of water pumps over the years and have never had/seen this issue before. Any idea????
Thanks.