I blew my 2001 Mercury, 225HP EFI up last fall. I had a shop in Pennsylvania put a new power head on it, or so I thought. I have had trouble getting on plane and generally it doesn't run well after I do get on plane. I just bought a pressure gauge and find that I am getting between 90 and 95 lbs. pressure on all of the cylinders. Is this kinda low for this motor? The motor probably has about 25 hours on it. This may be a dumb question, but is there any way to clean my injectors by flushing through the fuel system or similar processes without dismantling the front end of my motor?