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  1. J

    5.7 mercruiser heads question.

    I have a friend with a 1998 mercruiser 5.7 efi with cracked block. My question is if I swap the engine with same year post 95 motor with vortec heads(an automobile engine) did the heads that mercruiser used in the 1998 or post 95 goto vortec/same design as well. I’m asking to know if I need to...
  2. J

    Milky madness

    So i was boating today and heard a noise like an intermittent foam cannon. Stopped the engine looked under the hood to find this. Engine was running great when I shut her off and got towed in. 5.7 v8. what do I do after I clean this up?
  3. J

    PCV Question

    I am not sure how to hook up my pcv system because both of my valve covers have a pcv outlet and my flame arrest only has one input connector. None on the base of my carb. Do I connect the hoses together with a T or do I block one off. I asked at Napa and they said I could block one off and just...
  4. J

    Cedar strips cover failure

    I’m in the middle of my rebuild. Stringers down. Sanded tops ready for the deck going in this weekend. foam in(pour in with some low spots). Last night it rained and my cover failed. I didn’t have the cover strapped in as it has never failed me. Well. The water collected in the middle of it...
  5. J

    1974 del magic build foam question

    So I’ve been keeping up with restoring a boat lately. It’s a 1974 Fiberglass Del magic. It looks exactly like a Glastron to note. Done new stringers and transom and getting ready to put 2lb density foam in it. I am not sure how much it needs as I still need to do the calculations. But I already...
  6. J

    Mercury 800 80 hp leaking gas/oil mix when lower unit dropped.

    Hey y’all(Texas), I have a 78’ mercury 80hp 800 model 2 stroke. Done the impeller, impeller seals, complete carb rebuild. Did a pressure test at 10psi on lower unit for around 5 minutes and held. Have ran it previously after doing all of this work and drained oil already due to suspecting a...
  7. J

    Broken jet plug mercury 1978 800 80hp

    Well I was doing something on my rebuild and I broke the jet plug that holds the screw in jet. Part no. 1395-6199. I’m pretty much out of options on buying the part so I’m posting here. Not sure what to do. At a loss
  8. J

    Small tube from intakes question

    Hello. I have a 1978 mercury 800 80 hp. I was redoing the internal fuel lines yesterday and accidentally broke this small tube which is connected to an L connector that connects both the intakes. (2carb). I’m not sure what this small tube does I’m guessing it allows for a small extra amount of...
  9. J

    Question about MERC 1978 800 80hp carburetor rod.

    I was wondering if this rod connected to I think the gas valves of the carb is supposed to move like this and come all the way out of the socket. I notice that the hose it goes into it has electrical connections so I was wondering the function of this and if it looks okay. Posted video here on...
  10. J

    1978 mercury 800 hydraulic issues.

    My hydraulic motor pump is out on my project boat. Tested the motor directly. No motor turny. Have to get a new motor / pump. It’s a 4 hose system. Not sure if these pumps I’m finding online are 4 hose. I believe it is a pre alpha 1978 mercury 800 80 hp. 2 separate cylinders for trimming. Any...
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