Having issues with water pressure on this motor. I bought this boat/motor last year. First trip out last year I was only getting only 5-6 psi at wot. I replaced the impeller and then at best I got 10-12 psi at full throttle. Seems to me it should be a higher psi than that. Took it out again the other day and I’m back to the 5-6 psi at wot and maybe 2 psi at idle. Got a descent stream at wot but very weak at idle. Would a complete water pump kit fix my problem? Motor is on a 2007 21 ft sun tracker pontoon. I have a 2008 60 hp 4 stroke on my fishing boat and get around 20 psi at wot. So I’m thinking I have a problem somewhere. Any help would be greatly appreciated.
Serial # 1B497104