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    Mercury 1150 Water In Bottom 2 Cylinders

    Replace the lower crank seals, bearing cap oring and likely the lower main bearing. Hopefully it is just the crank seals, as it is an easier repair.
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    115 v4 manual

    Try marineengine They will want the model number as well to get the correct manual.
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    Bimini top advice needed

    To be clear, a top that attaches to the windshield is normally know as a Navy Top. Bimini tops are freestanding. Measure the boats width at the helm and measure out how long you want it and look online for a kit. The length you buy is not as important as the width, as several lengths will...
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    Part Identification

    That amount of fuel will make a very large explosion under the right conditions. The boat and any passengers would be reduced to matchsticks. That fuel tank should be either aluminum or more likely plastic, based on the age of the boat. Neither would corrode that much. Any chance it is not...
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    Spindle pitting or discoloration?

    If you packed the bearings with grease, they should apply grease to the races. As long as there was no play in the bearing and no restriction to spinning, you should be good.
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    Snaps hole repair

    There are larger screw snaps available. Alternatively you can replace the screw with a pop rivet.
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    1980 Beachcraft I/O Pretty but Rotten

    Not sure what "Glas-core" stringer system is. It sounds like stringers may have some fiberglass in them. FG stringer components will last longer than wood. Pretty advanced for 1980. You might check year of specs. Check the transom for rot yourself. The deck is easy to replace, but you...
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    same speed with different props

    Flashback has one cause. Here is another. Some boats have hulls that cannot be driven faster, due to their design. Straight vee hulls are an example of those. They simply do not trim very much. As you may know, Trimming reduces the amount of hull in the water, lessening resistance. Not...
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    Hard starting

    Gee, you replaced head gaskets, before cleaning the carbs? Why was that? Lack of a functioning choke and dirty carbs would be first check, I would think.
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    Overheating issue.

    Also, a lot of those motors had water temp gauges and oil pressure gauges, and a separate warning buzzer for overheat and no oil pressure. These two sensors share the horn. If your turn the key on and do not start the engine, the no oil pressure buzzer will sound after a few seconds. That is...
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    Overheating issue.

    Clogged exhaust manifolds and risers can cause overheat. When were they last changed? In salt water they last 8-10 years. In fresh water a lot longer, but your motor is 34 years old.
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    Optimax primer bulb location/orientation

    The orientation of the primer bulb makes no difference. There is a valve that opens to allow fuel to bypass the starting fuel pump. Maybe it is stuck, starving the motor of fuel?
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    V4TL-13A Compression Validation

    Are those the correct spark plugs? I though they were all J4C Champions. Remember to disconnect the electric cables to the gearcase, before dropping it.
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    Spun Prop

    Yes, pin drive props can spin. The rubber hub goes bad. A lot of those motors had brass pins, however, that makes no difference to your issue. Make sure she is running on both cylinders. The spark plugs should look about the same, if both are firing.
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    No core floor

    Gee, if you don't pull the cap, how will you fasten the new deck to the stringers? In boats, if it is not fastened real well, it will move. My rule of thumb is that if a nail works on land, use a screw on a boat. If a screw works on land, use a bolt and locknut on a boat.
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    Advice on a 4 winns restoration

    If that is the good stuff, what is the bad stuff? Put a sander on it and then vacuum and see what it looks like. It needs to be clean and solid, with no rotted pieces and mildew.
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    No core floor

    If you do not plan to walk on the deck, foam it up flush with the stringers (actually, do this no matter what your plans are), and lay a couple of layers of 1.5 oz mat over it. If you plan to walk on the deck, I do not understand your design constraint.
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    No core floor

    Balsa Core is used to save weight. IMO it's strength in not the factor. I would recommend dry 1/2" pressure treated CDX plywood. Cover it with at least one layer of 1.5 oz fiberglass mat. The plywood gives the strength and the glass waterproofs it. Solid fiberglass will be real heavy, as it...
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    V4TL-13A Compression Validation

    That is a 50 year old motor. Run it as is. It is just out of spec for even compression.
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    06' Merc Optimax ?

    The Optimax motors had a design change early on. After that they stayed pretty much the same. You might look on the crowleymarine web site at the different years and see if you can find the year it changed. Alternatively you can look in a service manual and see the changes in maintenance.
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