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    Correct prop diameter? Distance from the plate?

    Hi, I am replacing a broken prop on my boat. I have read about choosing the correct pitch size (RPM at WOT test) and I will eventually do that test (when I will get some new prop to put on). But what about the correct prop diameter? Is there a rule for choosing the prop diameter? This boat was...
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    What replaces Quicksilver Perfect Seal?

    Hi, I cant get the Quicksilver Perfect Seal locally. I cant even find it on the Internet. Please, let me know what can serve as a replacement? Or where to buy the Perfect Seal. Thanks!
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    Cleaning mineral deposits on outdrive (aluminum).

    Hello, What is the best (safe and easy) way to remove mineral deposits from aluminum parts of the outdrive? Deposits look like a white crystalline substance, easy to scrape with a wooden tooth pick (for example). I don?t think this is aluminum oxidation. The outdrive is in a good shape, paint...
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    Outdrive Oil Vent Thread Broken

    Hi, I replaced gear lube in the outdrive unit (1993 Mercruiser) and tried to put back the vent screw (one on the left side). The manual said ?torque to 40 lb. ft.? I set the click wrench to 20 lb. ft. to be safe and, guess what, I broke the thread!!! :eek: I did not push much, it was probably...
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    Where in the carb should I spray the fogging oil and how much?

    Hi, Where in the carburetor should I spray fogging oil? I lifted the flame arrestor but there are quite a few holes underneath. My engine is 1993 4.3LX/V6 Alpha One Thunderbolt Ignition, serial number OF0244564. The carburetor looks like Weber 4 barrel. In the front part of it there is a...
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    Simple questions on oil change

    Hi, My question is where can I find instructions for changing motor oil on my engine (1993 4.3LX/V6 Alpha One Thunderbolt Ignition, serial number OF0244564). The service manual (#14) does not describe this. Basic questions are: What grade oil? How much of it is needed? How to pump the old oil...
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    Simple questions on changing oil.

    Hi, My question is where I could find instructions for changing motor oil on my engine (1993 4.3LX/V6 Alpha One Thunderbolt Ignition, serial number OF0244564). The service manual (#14) does not describe this. Basic questions are: What grade oil? How much of it is needed? How to pump the old...
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    How to find the drain plugs on my engine?

    Hi, My question is how to find the drain plugs on the water cooling system of my engine and to make sure that I did not miss one? This is for winterization, of course. The engine is 1993 4.3LX/V6 Alpha One Thunderbolt Ignition, serial number OF0244564. The transom is OF058634. The drive is...
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    Which manual should I use for my tilt/trim system? And what liquid?

    Hi, I want to bleed and flush the trim/tilt system with new liquid (I discussed the problem of milky liquid on another thread) and I want to consult the manual, but I am not sure which one is correct for my boat. The engine is 1993 4.3LX/V6 Alpha One Thunderbolt Ignition, serial number...
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    Trim motor doesn?t stop in the lowest position. Is this normal?

    I suspect that my tilt/trim system does not work correctly. I am not sure how it should be, thus, I am asking this question. So, the amplitude of motion of the outdrive unit is OK. It goes all the way down and goes up far enough. When I use the ?trailer? button, it goes all the way up. No...
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    Milky liquid in the tilt/trim reservoir.

    I checked the liquid in the tilt/trim reservoir and it looks strange. It is not clear; it has some kind of a whitish milky color. Does anyone know what this is? The trim works perfectly, goes up and down as far as needed in all conditions, on the trailer and on the full speed in the water. I...
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    Engine is hard to start.

    Hi, I have a 4.3 LX/V6 Alpha One Balanced Shaft/Thunderbolt IV Ignition engine on my 20? Sea Ray. The year is 1993. Although 15 years old, the engine has only about 450 hours on it and was professionally maintained by the previous owner. I got it this summer and have experimented with it for a...
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