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    Head gasket and intake manifold

    So I’m changing gaskets on my 4.3 mer cruiser and I can not for the life of me get the intake manifold and cylinder heads off the block. All bolts removed soaked with PB Blaster, no luck. Any tips or tricks from experience out there?
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    4.3 mercruiser overheated .. need check list

    Hey guys boat was running good Older mercruiser 4.3 alpha 1 outdrive, I went threw a shallow channel and think I sucked up some mud and plugged the water intake somewhere before the thermostat. I got out the channel and gave it some gas, it was smoking and sounding funny then it died with some...
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    Hard knock when shifting into gear

    Hey guys ive had the boat out couple times now, been running good but what I don't like is when I shift from neutral into gear there is pretty alarming bang. What is it that's happening? Is it located in the sterndrive? And is it an expensive\easy fix ? Running a 88' Mercruiser 4.3 w\ alpha 1...
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    Caurburated 4.3L mercruiser ... do I really need a thermostat??

    Ok simple question older 1986 4.3L carbureted engine “B” serial number, do I really need a thermostat to run? Will it help the engine to get to temp sooner? Yes, But is that a make or break issue with a carburetor? Pros? better water flow?/ cons? Cooler engine temp? Just looking for knowledge...
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    Approval on performance upgrade for 4.3 mercruiser

    Hey fellas I was browsing some old post and saw some talk about upgrading a 4.3L Mercruiser from 2 bbl carb and intake to 4 bbl .. I found these parts hoping there just bolt on and minor air/fuel ratio adjustments? Any advice would be great?? I have engine number B403048
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    4.3l mercruiser dies frequently

    I just rebuild some things on my 86 sunchasser deck boat. It has the 4.3l mercruiser engine... I got the thing running ... new coil, plugs, wires, battery so now I replaced the impeller and some hoses along with a 140 degree thermostat. The engine starts good but once I get into gear and running...
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