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    Engine Re-power

    Optimax is a direct injection 2 cycle engine, the same basic design as the FICHT you had. Optimax uses high pressure air and fuel to aid injection, versus FICHT, which uses only high pressure fuel to aid injection. I expect the Optimax will have similar performance, although greater power...
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    Another winterization question

    A lot of people do not understand the benefit of filling the block with antifreeze. They think it unnecessary.....well it is, if you are positive you got all the water out of the block. So, do you feel lucky?
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    Fuel Problem

    The gumout sprayed on the intake components indicate an air leak. I would check the bolts on the carbs (carefully) to make sure they are tight. You do not want to crack the carb bodies. If the air leak is small, it will have minimum impact on high speed operation. it will normally make the...
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    Merc's 150 HP 2 Stroke EFI Motor.-

    Sounds like an electrical problem...loose connection?
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    Fuel Problem

    Tony, your motor is 2 cycle, so each cylinders crankcase is designed to be isolated from all others. You would need to check pressure/vacuum on each cylinders crankcase. Gee, why not just clean your carbs?
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    Overweight motor

    Joe, See where the antiventilation plate falls in relation to the bottom of the hull. Perhaps the midsection of the motor is too long or too short. Also, see if the motor "hangs" straight down. Some hulls have angled transoms. See where the tilt pin is set. These control how much the motor...
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    1973 Mercury 1150 Misfire on cylinder 3 and 6

    If the waterpump base is melted, replace it also. Also, if you suspect a driveshaft seal leak, replace the pump base. Make sure to clean the driveshaft and lube, before replacing pump base, or new seal will be damaged.
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    Another winterization question

    Running the motor in a bucket of antifreeze is a really bad way to winterize it. When you do that you get some amount of antifreeze, into some part of the engine, at some strength. Very dangerous for the engine. My recommendation is to drain it completely and then fill each hose with some...
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    Fuel Problem

    Tony, Carb kits usually come with gaskets for the side plates on the throttle bodies. You can spray the idle passages and idle needle after removing the side plates, without removing the idle needle. So the carb synch is not disturbed. Carb kits will come with the "spaghetti" seals for the...
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    1975 Mercury 650 starter issue

    Mercs of that vintage have a battery cable for both positive and negative on the starter. Make sure both are clean and tight to get max voltage to the starter. Make sure the ground cables from the lower cowling to the engine midsection are clean and tight as well.
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    1973 Mercury 1150 Misfire on cylinder 3 and 6

    Good stuff, I hope that is the issue.
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    Another winterization question

    Most I/O Engines are either FWC (antifreeze) or RWC (raw water)cooled. A lot of FWC engines don't need any winterizing, as the engine block is full of A-F and the risers are self draining and raw water cooled. However it is important to determine what you have, and winterize the parts of the...
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    Fuel Problem

    Great, If the issue is there on initial start up and run, and after you take the vapor separator apart, you can then clean the carbs idle circuits.
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    1973 Mercury 1150 Misfire on cylinder 3 and 6

    I do not think you have an ign problem. At least not on the distributor side. Make sure the part of the cylinder head that seats the #3 and #6 spark plugs is clean, so they have a good ground. What did you see on the timing light? No flash on cylinders 3 and 6?
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    Fuel Problem

    Tony, your original description does not match the heat soak issue. Heat soak (if that is what happens), occurs when the motor is run for a while, turned off for 30minutes or so, and restarted. The motor initially runs perfectly at idle and high speed, until turned off and restarted. That is...
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    Fuel Problem

    Tony, so you think only 1 or 2 carbs would get dirty at once? Let's see same fuel, same time frame, but only dirt in some of the carbs....really? If the vapor separator cover leaks or the needle is worn, the motor would starve for fuel at high speed, as well. Not what was reported.
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    Fuel Problem

    And why don't you think it is your carbs? I would suspect your carb idle circuit and needle are dirty or out of adjustment. BTW - the idle needle is likely located in the throttle body, not the carb. Make sure the carb bowls haven't warped. The plastic ones tend to do that.
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    Winterizing Question

    After the block drains, add some A-F via all hoses and watch for it to push out some additional water. When you see the A-F start to drain, install drain plugs and fill block and manifolds. You should see some A-F out exhaust . Don't forget to dump A-F down raw water hose to push water out...
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    2004 75hp Mercury outboard No power

    What you did will not ruin the starter solenoid, so she would crank. I therefore suspect you do not have power to the ign switch for some reason. Maybe another fuse? Broken wire? Be aware that she may not have spark, since you switched the batt terminals. That is hard on the ign system...
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    2000 Johnson 150 hp Port side temp switch

    See it the one wire temp switch will thread into the block. If so, make some kind of a jumper from the sensor to the temp wire of the 2 wire sender. I would think a bullet type connector might work. Remember the temp sender wire is tan. That is the one to connect the one wire temp sensor.
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