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    Water in All Cylinders

    Winterized 4.3L according to Mercruiser Manual but did something wrong because I have water in all cylinders. Cleaned all drain plugs to get complete drain down and refilled both block and manifold with RV anti-freeze. This is the dry joint manifold design and I wonder if it's possible to have...
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    4.3L Dieseling

    4.3L/LH 2-BBL (2004) was running hot (up to 190 deg) with hot riser on one side so changed the impeller and motor is now running 160-175 but now experiencing some dieseling unless I let motor idle for several minutes before turning off. Used some seafoam during this same run because had trouble...
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    4.3L Has Hot Riser on Port Side

    Just installed factory exhaust manifold on port side to get dry-joint back to original setup, previous owner had installed after market manifold and it was leaking. The riser looked ok so re-installed with new manifold. Removed hoses leading to risers while engine was at idle and same amount of...
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    Right Prop

    Looking for right prop for my 1992 23' trophy that is equiped with 4.3L (2-bbl 200hp +/-) engine and Alpha-One Gen II (CR, 1.47 ratio) outdrive. The boat with 4-6 passenger, half tank and misc probably runs 4500-5000LBS. The boat currently runs at 25-27mph at WOT (4000 rpm). The comfortable...
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    4.3vortec clunky cranking

    Have a 4.3 vortec that started fine till recently. Batteries are fully charged but need a jump to barely turn engine over. Makes a loud clunking noise while starting but runs fine once running, 4000 rpm with plenty of power. Able to turn engine with breaker bar with plugs still in place. Oil...
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