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    Carburetor clean versus carburetor rebuild

    Gee, that thread is ugly. The Mercury floats of the 70's and likely earlier were dissolved by the alcohol in today's gasoline. They must be replaced. Mercury carb parts were made to be replaced, on a regular basis. If you want to pull down the carbs on a large OB and clean them and install...
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    Carburetor clean versus carburetor rebuild

    Good for you, however, did you ever consider how much fuel costs, if it is leaking from the carb, because of a faulty inlet needle or float? A drip a minute will waste gallons over the course of a day. Carb gaskets for an inline 6 Merc carb are $4US/carb. Gaskets, inlet needles, seats and...
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    Carburetor clean versus carburetor rebuild

    Most marine carbs need to be periodically torn down cleaned, and rebuilt. The rebuilding parts are gaskets, which are real cheap and floats and inlet needles and seats which are pretty cheap. You need to make the aluminum passages and brass parts are nice and clean, when you do it...
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    1979 Mercury 70 EL Thunderbolt Kill Switch Install

    First you need to see if it is ADI ignition or battery powered CDI. I expect it will be ADI, but you need to look. If you have 3 or 4 coils, it is ADI. A single coil and distributor is battery powered CDI. The rest of these instructions are for ADI ignitions. I can advise on battery powered...
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    Bilge pump/ blower needed

    Gee, I never heard of one of those. Can you post a picture?
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    Mariner 40ELO 6E9-451908 blows fuse after starting

    Gee, disconnect the stator wires from the rectifier and then disconnect the red wire from the rectifier. If the fuse still blows, that is not the issue (obviously). Now check the accessory wire (usually purple), and trace it to each gauge and anything else it connects to, looking for melted...
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    Mariner 40ELO 6E9-451908 blows fuse after starting

    Look for a short on one of the ign accessories, connected to the ign keyswitch. When you turn the key to start, the ign accessories wire has no voltage on it. When you release the ign key to the run position, power is put on the ign accessory wire. If it has a short, it will blow the fuse...
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    ENGINE SURGING

    Pump the primer bulb and see if the surging stops. If so, rebuild the fuel pump, clean the fuel filters, make sure the tank vent is clear.
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    Spark plug

    That is just some corrosion on the spark plug shell. You can spray the plug shell and the engine block with some corrosion guard to slow it down. Changing spark plugs once every few years is really all you need to do.
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    Inboard/ I/O Engine Hoist Ideas?

    Gee, I built a "Old West hanging scaffold" to pull my I/O engine. It had 4X4 uprights and a double 2X10 header. It also had several 2X4s to brace it. Use deck screws to assemble, and it can easily be disassembled. Back the boat under it, attach the cum-a-long to the block and lift her out...
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    Really weird electrical issue

    Not sure about the precision of post #2. He is talking about a short from the ign killer wire to ground. Not sure that is your issue. I do think it is a bad ground wire. It would be best to clean and inspect all ground wires. It appears that both power to the engine is affected, as well...
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    above vs below deck fuel tank

    Fully enclosing the fuel tank in the console, makes it a "built-in deck fuel tank". It must have a permanent fill and vent thru the console walls. Since it is fully enclosed, sunlight is not an issue, right?
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    Need not peeing on first season fire up

    Trace the telltale hose to the cylinder head water jacket. Remove the telltale hose at the cylinderhead water jacket. Start her on a flusher device and see if a strong telltale stream comes out of the elbow.
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    Changing remote controls?

    Your ignition switch should have power, ign, and starter solenoid wires. Put the purple wires of the kill switch in series with the ign wire. That is, ignition wire from the motor, goes to the kill switch purple wire, The other purple wire from the kill switch goes to the ignition switch.
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    Changing remote controls?

    Normally on a stern drive, the kill switch would need to kill 12VDC power to ignition. You would hook the ign wire thru the switch in series. the switch must open to kill ignition. An outboard kill switch usually grounds ignition. You would hook kill switch to ground and ign killer wire...
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    pulls right at wot

    OK, the boat looks to be a pretty normal hull with sterndrive power. What HP are you running? Why no power steering, as I had thought most/all sterndrives had it? There is a fix used on high performance hulls. The kind of hulls where the engine is high enough on the transom, so the anode...
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    Tach gray wire short?

    When I said VR, I meant Voltage Regulator.
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    Tach gray wire short?

    I have a '98 Johnny 60*V6, which is real similar. The engine has two 6 wire connectors, giving two 6 wire harnesses. At the dashboard these two 6 wire harnesses are interconnected to become an 8 wire System Check Tachometer plug, a 6 wire plug for the ignition key and 3 ring terminals for a...
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    Fuel Leak, center carb

    OK, we seem to be talking about different plugs. The hex plug on the front of the carb uses a gasket. The slotted brass plug on the bottom of the carb is a taper fit, without a gasket. The black Permatex (number 2 or 3) is a bad idea. The fuel will dissolve it. Use some nail polish (with...
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    Issues after impeller change. Gears seem off. Pee's fine now

    It sounds like you do not have the upper and lower shift shafts properly aligned. very common issue. Remove the gearcase. Set the control to neutral. I ratcheting sound as the prop is turned CW is forward gear. if so, carefully turn the shift rod on the gearcase CCW, using a crescent wrench...
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