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    ‘75 or ‘76 Mercury 650 three banger spark issue

    Check the resistance of the spark plug wires. It should be zero. Distributor ign right? The spark plug wires should screw into the Dist. cap. Check the condition of the rotor and cap. They last a long time, but not forever. The rotor is not detachable, expensive and fragile.
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    93 Johson 150hp fuel issue

    Remember, the idle jets, needle and passages are in the throttle bodies. They need to be cleaned as well.
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    Did my new coil die after one hour use.

    The Amplifier is not shown in your picture.
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    2004 Johnson 90 blowing main engine fuse

    The main fuse blows when the ign power (purple) is somehow directly connected to the ground (black). You shifted the motor and then the fuse blew? Do you have the control with the ign keyswitch in it? If so, maybe a wire is rubbing inside the control. If the ign keyswitch is on the dash...
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    Fuel Issue

    I think you have an air leak into the fuel line. Check all joints and terminations for leaks.
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    Did my new coil die after one hour use.

    The rotor may or may not have the chrome disc, under it. The chrome disc has "fingers" that point down, one for each cylinder. If you have the rotor with the fingers pointing down, that's the reluctor. Those swing thru a gap in the Sensor Assembly. The sensor assembly sends a signal into the...
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    Timing on 1986 Mariner Outboard

    What HP motor? Most Mercs of that year have a "W" shaped key that aligns the flywheel. As long as you pull the large flywheel nut and then the flywheel, and put the stator on exactly as it came off, the timing should be unaffected. of course, it would make sense for you to learn how to check...
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    I'm looking for a wiring diagram for 1994 Starcraft Superfisherman 191

    Engine wiring can likely be had. For Boat wiring, you are on your own.
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    Did my new coil die after one hour use.

    Does that motor have points or a reluctor? Reluctors have ign modules that provide the spark plug firing signal. It those contacts are as bad as the others you describe, the module may be bad. If point ignition, maybe condenser, points or wiring is bad.
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    How to tell a replacable hub prop

    Gee, do a internet search on the prop brand and model you want. pick the lowest price. Do the same for the hub for that prop. A local prop shop likely charges a premium to pay for his brick and mortar store, and other skilled labor and tools. Internet sales can be much cheaper. They...
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    How to tell a replacable hub prop

    Prop hubs are usually about $50, and you only need 2 of them. One for a spare. Now you can buy as many different pitch prop shells as you need, that fit that hub. Aluminum prop shells can be had for $75 or so. You might check some other source.
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    help me please if possible

    When you rebuild the carbs, it is wise to clean them and install new gaskets, inlet needle and seats and floats. Invert the carb covers and bend the carb float levers so the upper (on inverted carb cover) lever, is parallel to the carb cover. With the carb cover non-inverted, there should be...
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    help me please if possible

    The three carbs bolt to the block. Next to them on the block are 3/8" vacuum hoses. These are the balance hoses and connect to elbows in the block on the top and a tee in the middle, next to the carb bases. There is a small (1/8"?) hose that connects to an elbow at the base of the powerhead...
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    Some simple questions on a '85 75hp

    The manual choke wire (Merc used copper wire and ring terminals, for some reason), connects the choke lever to the black plastic knob directly above it. The knob is a friction fit into rubber. You pull up on it to choke. The rear cowling support (you call it a cage), has four 5/16" bolts to...
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    1991 Mercuiser 4.3 ignition system update

    You might post this in the MerCruiser stern drive forum.
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    How to tell a replacable hub prop

    If you look at the back of the prop, and see plastic, the hub is modular. If you see all brass, the hub is fixed. The prop shells are usually tapered rectangles, with eased corners. Therefore the modular hubs have a lot of surface area to grab. I have never damaged a prop hub, but I...
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    Power Tilt/Trim Installation - Late 70's Mercury 90HP

    You will quickly find that the power trim cylinders are a lot longer than the shock absorbers, hence the PTT brackets. The PTT cylinders mount on the shock lower mounts, and bolt to the separate PTT mounts. The PTT brackets mount to the shock upper mounts, if I remember correctly.
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    mercury 2.5 lower unit shimming

    Knock-knock joke right? 2.5 lower shims who? Can you be more specific with your question?
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    very cool carb and intake manifold causing moisture

    I have seen water in the crankcase of an Evinrude V4. It was not caused by condensation. It was caused by some sort of leak. As a rule Carbs get real warm after running a bit, hence no condensation there. Vapor lock is more common. Airplanes (because of the altitude) are an exception. The...
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    very cool carb and intake manifold causing moisture

    Racer, I think you are wrong. Lets see what the Op comes up with.
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