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  1. M

    Merc 60 EFI Fluctuating motor speed at any speed, air in fuel filter

    Yep. Pulled it out of the water (not easy), took it to the dealer, they had it for two weeks, said it was a cracked spark plug and it was running perfect. Took it back, put it back in the lake (not easy) and it was running a bit better but still speed fluctuates and the thing stalls. Dealer...
  2. M

    Merc 60 EFI Fluctuating motor speed at any speed, air in fuel filter

    2022 Merc 60 EFI SN 1C700202
  3. M

    Merc 60 EFI Fluctuating motor speed at any speed, air in fuel filter

    I've replaced the IAC Valve - no improvement. Also checked and tightened all fuel hose connections up to the filter. It seems to be sucking in air and will gradually drain as the engine runs. If I remove the filter element it stays full, but the engine speed still fluctuates and the engine...
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