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    very cool carb and intake manifold causing moisture

    If you are running E15, I doubt alcohol cooling is your issue. I am not familiar with your motor, but I would be looking for water leaks into the crankcase. The likely culprits are head gasket, or cracks in the water jacket.
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    Engine running 🔥

    As Bondo said, a lot of those V8 MerCruisers had raw water pumps, with thru hull pickups, to cool the engine itself. They therefore did not rely on the OD pump to do that.
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    Overheating issue.

    Your motor should have water hoses to each manifold and each riser. There is a ball and spring device under some of the hoses that helps direct water flow to risers(if I remember correctly). The gaskets were chosen to assist this circulation system. Use the gaskets recommended for your...
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    1982 ADI Mercury 115 6 Cylinder pesky miss

    Compare your spark plugs with each other. All should be brown or black. Any that are clean, like new can indicate water infiltration into that cylinder. Your main jets in the carbs are installed and correct for the motor? It should not studder at 3000+ RPM. If so, make sure the high and low...
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    93 Johson 150hp fuel issue

    The kits are avail aftermarket. Likely Sierra and GLM make them. Make sure they cross exactly with the OEMs, by checking several sites. I had trouble with the kits on a similar motor. The spaghetti seals were real close, but not exact. The main jet is in the carb bowl. The idle jets are...
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    Overheating issue.

    Flappers are not really important. They will stop water from backing up into the manifolds, if and only if you make a quick change from high speed to no speed. That maneuver is not one you should make for a variety of reasons. Fix the manifolds/risers first.
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    Overheating issue.

    There should not be any water in the exhaust passage of the manifold. It should stay in the outer water jacket (hence the name). The trailing ends of the risers rust away first. This can let water dribble into the manifolds, thru holes or voids. Water in manifolds can easy get into engine...
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    2 Strk Carb 1990 Merc 175 - not starting when hot - warm - 30 min wait starts fine

    When you have the no start condition, check for spark.
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    johnson 150 Low Rpm

    Gee, the main jets are real easy to clean. Why not start there. If they are clogged, imagine how clogged the much smaller idle passages are. Idle passages are located in the throttle bodies, BTW.
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    Water in oil

    Post this in MerCruiser forum. Those guys are experts
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    New fuel lines on inboard tank cannot prime!

    That can work, but the empty water separator is a real issue.
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    Shifting in Reverse Problems

    Check adjustment of shift lever. Not sure how to do that on your motor. On the larger motors, we set the shift slider to neutral, with the cable disconnected. Now adjust the shift cable to fit the position of the shift cable, with the control in neutral.
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    New fuel lines on inboard tank cannot prime!

    If the water separator is empty, it can be real hard to prime. Fill it with fuel. Also fill the primer bulb with fuel. They are not very good at pumping air.
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    Mercury 1150 Water In Bottom 2 Cylinders

    Tilt the motor up and pour 2 cycle oil into the spark plug openings. Tilt the motor down.. Squirt some fogging oil into carbs, while turning it over a few turns. Hopefully the 2 cycle/fogging oil will replace the water in the cylinders and crankcase.
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    What size motor do I need?

    80HP was probably more HP than was available in a single OMC engine in 1964. Merc may have has a 90HP skyscraper in those days.
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    Shifting in Reverse Problems

    Is the gear oil the proper type and clean? That is the first and cheapest check.
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    evinrude 25hp painting with mercury paint .

    Mercury paint on a Johnnyrude...the humanity of it all.
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    Parts Listing

    Crowleymarine should accept your serial number and provide parts list.
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    Battery Boxes, Battery Trays, & 2nd Battery.

    If there is room, locate the two batteries side by side. If protected area, a battery box is not necessary. A battery tray and hold down is just fine. Add a battery switch to add some flexibility and isolate starting battery from "house" battery drain.
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    Need new axle.

    Eastern Marine in DE has quite a selection of trailer parts. They list exact matches for the more common trailer brands. If your trailer is not in that list, just match the capacity and length to your current axel.
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