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    Mercury 50hp 1986 CDI

    Are you talking about the switchbox, trigger, stator or what? A 1986 motor would have 4 coils, and a single switchbox. What do you have?
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    Adding ignition kill switch and lanyard 96 Johnson 88

    One more thing. Your OB needs the kill switch to connect the two wires, when the lanyard is pulled. Some kill switches disconnect the wires when the lanyard is pulled, and some have both functions in one switch, and you get to choose which function you want to use.
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    Mercruiser 3.0L Overheated What to Look Out For?

    Gee, check the stuff Scott mentioned, replace the impeller and test the motor. We had 195* thermostats in our cars in the 70's, so if it really was just 200*, it may be fine. When you replace the impeller, replace the wearplatee and two gaskets. Inspect the pump base for melting, and the pump...
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    Please help trying to check timing

    I remove spark plugs 2-6, so the motor will not start, as I need to set idle pickup timing and full throttle timing. I do not see any advantage to removing spark plug #1, as you still need a source of ground to make the timing light pick up the spark.
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    Adding ignition kill switch and lanyard 96 Johnson 88

    Is your current ign switch on the dashboard? If so, connect the kill switch to the black and black/yellow (or black/white) wires, on the ign switch. Find a place the the kill switch to be mounted, and you are done. If you have a control with the ign switch mounted in it, it is the same...
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    Fuel water separator and fuel filter on 3L

    Gee, I leave my boat in the salt water from May to November, and never have more than a tablespoon of water in the separator when I winterize it. The tank is 63G.
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    Anyone got any dynamite

    With all that new stuff, maybe old wiring is bad? You did connect the banded stator and trigger wires to the same switchbox?
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    Impeller replacement

    I have that motor and have done many impeller changes. First off, replace the impeller, wearplate and the 2 gaskets that sandwich it, as a minimum. Check the upper pump SS cup for scratches. Replace if you find them. Check the pump base for melting, if so, replace it. If you are getting...
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    Stern Drive, Trilux and Prevale Sprayer

    You will get much better anti fouling protection if you brush (2 coats) on the trilux. Spraying is easy and looks nice, but the coverage is thin.
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    Fuel water separator and fuel filter on 3L

    IMO, the clear racor filters do not give sufficient extra value to justify the additional cost. Plus, I seem to remember one of the plastic bowls was ruined by the sun, and leaked fuel.
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    Fuel water separator and fuel filter on 3L

    Gee, in post 29 you complain about water in the fuel when you fill up. In post 33 you say the rain got into the tank. You have confused me.
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    Lower unit oil -- water or not?

    Water is present, IMO. Let the mix settle and it might separate.
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    Adding ignition kill switch and lanyard 96 Johnson 88

    If you do need to add a separate ign kill switch, just splice it into the black and black/white wires. To kill the ign, they need to be connected together. My OEM harness uses bullet connectors to connect to the ign switch. I would simply use some of those to make some "Y"s to splice in the...
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    Adding ignition kill switch and lanyard 96 Johnson 88

    My '98 Johnny came with a lanyard that fits the factory ign switch. The ign key can be used with or without the lanyard, as the lanyard, when pulled, turns the ign off. Here is the OEM ign switch. If you have one, you can buy just the lanyard...
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    Anchor line

    A couple of years ago I found 300' of 1/2" 3 strand on the intenet for $40. It along with 10' of chain, works real well on my 21 footer.
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    Merc 75 4 cylinders, 2 carbs

    Gee, pick a service manual from the link below. Make sure the carb is correct, so you can rebuild it properly. Merc made many motors with the same pistons, cylinders and ign systems. The carbs were different. Most everything else was the same for a long time. Your motor was made when...
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    1993 mariner od160931

    The Maxrules website shows it to be a 1992, based upon your serial number. They also show the mariner and Mercury models to be identical, except for paint.
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    Fogging with 10W30 oil

    4 cycle multi-vis detergent motor oils have metallic additives. Metallic additives are not good for combustion in engines. That is why they are NOT mixed with gasoline for 2 cycle motors. 2 cycle oil or non detergent straight weight motor oil (if you can find it) is acceptable to fog or oil...
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    Fuel water separator and fuel filter on 3L

    You might want to find a gasoline station without water in it's fuel. I have never had more than an oz of water in my water separator for my 63G fuel tank, at the end of the season. Try to stick with high volume gasoline stations, as they have the freshest fuel.
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    Alpha One Stern Drive Trim Fluid Flush/Fill

    A lot of those reservoirs unbolt from the pump, with a single bolt on the bottom. It will drain right into your bilge, or hopefully a catch basin.
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