It runs good until about 3500rpm, then when i rev up, it gets loopy, revs up and down,not really skipping,but like fuel mixture not correct. Idles fine. New plugs, fuel filters, 38psi fuel pressure, any help greatly appreciated.
Sorry,computer froze. Just got motor, took out on water once, did run ok up to 3500rpm, then bogged down any rpm's over 3500. Was afraid it might be a sign the fuel pump was going bad. Try it with muffs in gear. It will also clear out some, and rev up higher than 3500rpm on the muffs. Fuel pump with regulator built in is over $700. Can't afford it,to just be guessing.
Would not be surprised if you just have a failed spark plug, but the best might be to hook it to a computer and check for any error codes. You may use either the Johnson/Evinrude 4-stroke diag prg or a Suzuki prg. The EMM is a basic Mitshubishi design and have seen Mitsubishi prg work as well.
Would not be surprised if you just have a failed spark plug, but the best might be to hook it to a computer and check for any error codes. You may use either the Johnson/Evinrude 4-stroke diag prg or a Suzuki prg. The EMM is a basic Mitshubishi design and have seen Mitsubishi prg work as well.
Tryed new plugs today. How can i access those programs for the computer. Called dealer, wanted $$90. an hour. He was talking multiple hours to launch the boat to test it. Thanks for your input.
