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    No fuel coming from fuel pump.

    I just rebuilt the Rochester carb on my 77 merc 140. This was prompted due to some hesitation when I was accelerating. Ran smooth and would eventually get on plane if I eased it up slowly. I also replaced my fuel pump filter. I just attempted a post rebuild initial start-up. I was getting...
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    Carburetor linkage help

    I just rebuilt the Rochester carb on my 1977 merc 140. I am going to install it today and am wondering if anyone can review the attached pictures and let me know if the way I have the linkage connected looks correct. Thanks in advance for your assistance. Greg
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    Advice on setting choke on Rochester 2GC carb

    I am rebuilding a Rochester 2GC carb off a 1977 Merc 140 hp. I cannot figure out how to reinstall the choke cover/coil assembly. Specifically I am wondering how much tension(rotations?) I need when I install. Any help or resources you can provide would be appreciated. Tks, Greg
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    1977 Merc 140 hp Hesitation upon acceleration

    I have a 1977 Bayliner with a Merc 140 hp that I have owned for 25 years. After years of taking it to a mechanic I decided to dive in and try to work on it myself(limited mechanical skills but a helpful neighbor) Recently I replaced the head(rusted through), cam(likely victim of a hydro lock)...
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    Overheating issue on Merc 140 hp

    I have an overheating issue on a 1977 merc 140hp. I replaced the raw water pump but still am having problems. I want to confirm that the water pump is delivering proper flow after my replacement. How much flow rate should i see at the t-stat intake hose? I definitely see flow when I run at 2000...
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    Merc 140 hp- new lifter source

    Thanks for all the feedback on the camshaft replacement. Suffice to say I am trying to cut corners due to budget constraints and the fact that the entire boat is getting old and in need of more work than I can do at the moment. I am replacing all gaskets, swapping a head, replacing water pump...
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    Merc 140 hp camshaft replacement help

    I am replacing the camshaft on my merc 140 hp.(Long story) I bought a used camshaft that looks fairly clean. Two questions: 1) What kind of lube would you recommend coating it with for reinstall? 2) Would you recommend trying to buff off the little bit of rust scale with steel wool? Something...
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    Replacing exhaust gasket on Merc 140- Install dry of with gasket sealant?

    I replaced my head and now am putting the exhaust manifold back on. I bought a replacement gasket online that fits the manifold but I am not sure if I should apply sealant or put on dry. It is a Sierra part # 18-2912 gasket made from "CMP-4000" material green in color. I looked everywhere...
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    Replacement engine for a 140 hp merc?

    I need to replace a 140 hp mercruiser engine in a 17 ft 1977 Bayliner mutiny. (Froze it in the garage last winter after 20 years of ownership) Can anyone tell me how to determine whether a bigger engine such as the one below would work as a swap. Make: MERCRUISER Description: 4.3 V6...
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