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    5.7gs temp gauge wiring

    A lot of sterndrives have a temp gauge and a overheat alarm. Each of those have their own senders. On my MerCruiser, both sensors were in the thermostat housing. If you proved the gauge sender is good, and the gauge is good, the wiring is likely bad.
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    Stuck in forward?

    Gearcases are tricky to install in forward. I would recommend you turn it CCW back to neutral as you did before. Now tilt the motor all the way up, grease the driveshaft and shift splines and install the gearcase. Turn the flywheel a bit to synch the driveshaft splines, and she should go on a...
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    When do you pull your freshwater boat?

    As long as the water doesn't freeze, you are OK, with the outdrive down and the block is kept warm. On an I/O, I always put a 40W heating pad under the oil pan whenever the temps got to freezing. I would fish into Jan here on the NJ coast. However, once you pull it, it needs to be...
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    5.0 Mercruiser EFI - something causing push button circuit breaker trip on main panel

    I think you need to look for a wire downstream of the circuit breaker, that carries power. It would be a thick wire say 8 gauge, and it would need to rub against the metal of the engine and have a bare spot where the insulation has rubbed off. You might see a burn mark as well.
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    Waterski prop advice

    You will want to ski at about 35MPH, if slalom. With your motor and boat, I would expect a 21P 3 blade prop would work well, and still give 45-50MPH or so at WOT. Turning point makes an inexpensive 3 blade alum prop with good rake.
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    150hp xr2 ignition switch

    You likely have slightly different wiring colors than was posted. Red is battery power. It may be fuse protected and be a red/purple color. Connects to "B" terminal. Black is ground. Connects to "M" terminal. Black/yellow is ign killer wire. Connects to other "M" terminal. Purple is ign...
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    I turn the key but nothing happens.

    Maybe the neutral safety switch has a broken wire inside the control, or it is not activating for some reason? I presume you took the controller apart to grease the cables? Any parts left over?
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    Stuck in forward?

    Drop the gearcase and turn the shift shaft on the gearcase CCW until it clicks into neutral. Set the remote to neutral and reinstall the gearcase.
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    Boat plumbing

    I have a '98 SeaSwirl 2100 DC striper. All of the access to the plumbing components is granted by hatches or one kind or another. So you may need to remove some of the boats components, but I can get to everything necessary. Hopefully your model is the same. I have thru hull fittings for the...
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    I turn the key but nothing happens.

    Turn and hold the key and rock the throttle handle. Perhaps the neutral safety switch is not closing.
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    90hp Merc 3cyl reaches 3000RPM but takes awhile to go over 3000RPM

    Gee, what prop pitch and what kind of boat? For extra credit, what is the gear ratio of your gearcase? Have you changed props recently? Revving up under no load is not relevant. You could ohm out the high speed stator windings.
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    How to find a spark plug wire that is discontinued?

    If the length is good and the conductor is stainless steel, and the terminals and length match, it should work. I am surprised that Merc did not make the wires available. They are required to carry parts for 20 years, which your motor is that old. There are parts available for a lot older Merc...
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    How to find a spark plug wire that is discontinued?

    OK, the web says your motor was made by Yamaha, and the wires are avail from them or Sierra. Yamaha 18-8847-1 avail from Sierra https://www.wholesalemarine.com/sierra-18-8847-1-yamaha-spark-plug-wire-set/?avad=220733_d3b9ca8a1 With the reliability of the internet, You might take one of your...
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    Water pump tell tale

    OK, that is unlike the IL4/6 motors I had from that era. Did you check Crowleymarine?
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    Merc Controls

    I had a 1977 Merc IL6 motor, and when that went bad, put a 1993 Merc V6 motor on the boat, using the same controls. No issues at all. I have never worked on your motor but would have expected the old control to work. Mercs usually push the throttle closed when the throttle handle is in...
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    How to find a spark plug wire that is discontinued?

    Outboard motor spark plug wires usually have stranded stainless steel conductors. You can often buy them on the web. You should be able to make them up, if necessary. What year and HP is the motor?
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    Water pump tell tale

    The telltale is a pipe fitting on the block, a hose and a plastic fitting in the lower cowling. What do you want/need to replace?
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    AMS Oil 75W90 or Evinrude Lower Unit Gear Oil

    With gaskets on the plugs.....
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    50 hp force by Mercury electrical draw

    OK, you have a typo on post #4. You said now vs no.
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    Bayliner 1950 Capri Classic - Carpet replacement

    If the plywood deck is dry and sound, a layer of medium F/G cloth or mat and some polyester resin is all that is required to rehabilitate the deck. A lot of boat builders used a chop gun to spray a thin layer of chopped strands of cloth and resin onto the deck. This works for a while, but can...
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