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    135 V6 1994 Mariner, no mid range

    Engine idles fine and runs fairly well up to 7kts (1800 rpm). A tiny push on throttle and it will slowly work its way up to 14kts (3000 rpm). There is no way to run at 10kts. Engine has lots of power at top end.<br /><br />Well respected shop says there is nothing wrong with engine while on...
  2. G

    1994 135 Mariner surging

    I have changed all fuel filters, rebuilt the fuel pump, done the Seafoam decarb procedure from the FAQ and changed spark plugs. At any given RPM, 3000 for example, RPM will surge up and down by 2-400 every few seconds. When I pull the plugs, they all look the same, coated with blackened oil, and...
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