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    Vacuum Gauge Connection

    I have a refurbished Mercruiser 357 Alpha 4v. I want to tune the carbs using a vacuum gauge. There is no place on the base of the carburetor that I can find to connect the gauge. Do I need to take out one of the plugs in the manifold and connect the gauge there? I would think that if that is the...
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    Mystery Part - Help!

    I have a SE106 Alpha outdrive. The motor is a mercruiser 357 Alpha 4v. A mechanic that worked on my boat left a part in the boat. I do not know where the part goes or what it is for. The mechanic claims he did not leave any part in the boat. The mechanic put in a water pump kit, a new lower unit...
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    Engine Accelerates/Decelerates on its own

    The engine is a Mercruiser 357 Alpha 4v. While running, the engine will start to speed up. If I back off on the throttle, it will speed up again after maybe a minute. This continues. After trolling for a couple of hours, the engine will do the opposite. If I am running at 18 mph, soon I will be...
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