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  1. I

    evenrude sport twin 9.9

    my evenrude runs well with the engine cover off. When i put the cover back on, it slowly loses power and eventually dies. It's not pinching a fuel line or shorting out plug wires.
  2. I

    evenrude sport twin

    I have an early 80's evenrude 9.9 hp sport twin motor. It runs great with the engine cover off but loses power when the cover is on. I can have it running wide open, put the cover on and it will gradually slow down and eventually die. By raising the cover about 2 inches, the motor speeds up...
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