Bought a used 99' Chaparral Sig 27 w/ MCM 7.4 MPI with B3 drive. I've been through through hell getting into shape, but I'm finally there. <br /><br />Originally as I turned the key before cranking it over, the dash alarm would sound AND I could hear the fuel pump make a loud buzzing type sound. I know it was the fuel pump because I've had my head inches from it. The noise only lasted for 1 or 2 seconds. I replaced the fuel lines (leaking) and pump (corrosion). I solved the leaking fuel problem and the fuel pump noise was still there. I've only put 6 hours on the boat since then. The new fuel pump made the same noise as the original one. I just figured the pump had to prime/pressurize the system. <br /><br />Now sometime in the last 6 hours, the fuel pump quit making that buzzing noise. I do remember the fuel pump noise while testing on muffs in the driveway, but I don't know if quit immedately thereafter. I have absolutely no performnace issues whatsoever! At WOT 4600 rpms, my 28 ft, 7000# cruiser scoots along at 43 mph and burns 28 gph.<br /><br />This probably is a really dumb question, but is that buzzing fuel pump noise normal? I'm hoping it was never normal and I just advertantly fixed another problem.
