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    2.5L Mercruiser Alpha1 Knocking

    I just got this 1988 Sunbird 16.5' with a 2.5L Mercruiser MCM 2.5. Rochester carb And an Alpha 1 outdrive with a 17pitch SS prop. 4500RPM's seems to be max at speed trimmed right. I have some knocking in it in both nutral and drive. It seems to increase with RPM does not lack power. I ajusted...
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    SUNBIRD Model Help

    I just bought a Sunbird Boat its a bow rider listed as a 1987 and no model. Inboard 2.5l Alpha one drive. The boat Measures 16.5' and in 1987 there were no 16ft or 17ft Sunbirds made. I have the serial number or (VIN) from the boat its is<br />SB275###L687. As far as i can tell the SB2...
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