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  1. 2

    1997 mercruiser mag mpi water temp 125-180 fluctuates

    My 1997 mercruiser mag mpi serial number OK 151402 water temp is up an down al the time.Replaced thermostat sending unit an water pressure sensor.I have a Hardin Marine stainless steel housing on my sea water pump. My 454 also has the stainless marine exhaust with stainless marine crossover an...
  2. 2

    7.4 mag mpi backfires on take off

    Well need some help just paid $600 for new fuel pump an cooler still back fires on takeoff but starts right up revs up in neutral but in gear pops hesitates then take off .Also when trying to load on trailer it dies every time I have put new plugs wire rotor cap now new fuel pump an cooler.
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