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    Twin Chrysler inboards will not go over 3300RPM

    1978 Marinette has twin 440&#3 1978 Marinette has twin 440's. Engines were probably 1976+. They have 2000 hours but were rebuilt at 1200 hours. I have not been able to get over 3300 RPM and no more than 24 MPH. When the boat was new it would get 4200 RPM and run at 31-33 MPH. Original...
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