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    2003 8hp Merc...trying to find high altitude jets

    Usuall they drop a couple inches of pitch when they move to a 4 blade prop, check yours...if same pitch or higher than the 3 blade, then you hurt your power output.
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    What is this leaking from my lower unit?

    Oil in the fuel causes the exhaust to contain a black residue, anything that is part of or connected to the exhaust will have that black residue. That hole may be a drain opening for the leg exhaust, thus the black crud
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    1992 Mercury 40 hp 4 cylinder information

    Took the advice and looked at the hoses connecting the oil tank to the fuel lines. Actually they look new and they are soft and pliable. Felt squeezed and looked closely, no signs of being dry or any cracking. Thanks for the tip....feel much better knowing they are good !!!
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    Dual livewells, one switch

    Disconnected both my live wells as I dont tournanent fish, only fish for fun and food. Makes great extra storage !! If you only use one just disconnect the one you dont use. Mine had seperate plumbing and wiring for each live well.
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    Trim tilt

    Consider the weight distribution on your boat. My Islander ran bow up until I moved the fuel tank forward and got rid of the rear jump seats. Moved back seats to the front of the dog house, not only gained another seat but moving that weight forward made a world of difference with the trim
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    1985 50HP 4-cylinder power loss

    When was the last time you cleaned the internal engine with some sea foam or other cylinder cleaner?? Just might be stuck rings....
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    Getting more from 6hp in High Altitude

    How big of a boat, heavy?? Need more info, but if it is a good sized boat, that may be all there is...
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    boat seats

    Thanks for the replys....was hoping there was a simple trick I was missing. Guess I have to continue packing them up. I used boat covers for years and they are a great piece of mind !!! However on this boat, everything is stowed in lockers except these seats....also boat by myself often...
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    1992 Mercury 40 hp 4 cylinder information

    I will look that over carefully, previous owner had reciepts from a dealer that went thru motor thoroughly late last summer.....how thorough no ones knows for sure, but thanks for that tip !!
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    Dead battery after sitting on trailer

    Yep...get a switch installed, no matter how sure we think we are, we are still human beings and we do forget !!
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    No spark after spark plug wires wrongly placed… mercruiser 3.0

    When I had my 3.0, first thing I did was using a felt tip marker, wrote the cylinder number on each boot and the cylinder number on each cap post. When I replaced them just copy the numbers onto the new cap and wires. Saves a lot of headache like you are experiencing
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    18’ nitro 150 blackmax rooster tail or no rooster tail?!?

    Your best bet is to find a prop specialist in your area so he can see your setup. Very difficult to make any recomendations on here with so little information. A prop that is good on one boat may not be so good on another. Props need to be tunedvto your boat and motor as well as what you...
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    boat seats

    Having recently purchased a 16' aluminum fishing boat, the previous owner cautioned me about the seats comming out while trailering. I have the typical pedestal base with a pin on the seat bottom that slides into a hole on the pedestal... very common setup in most fishing boats from the...
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    1992 Mercury 40 hp 4 cylinder information

    Many thanks, just the information I was looking for. Always better to hear from someone with actual experience, rather than internet gossip
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    outboard motor mounting height?

    I was alway taught the cav plate was to be right at the bottom of the boat.
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    Boat two stroke engine stalls when throttle is applied unless I throttle up very slowly

    Probably needs carb rebuild with a proper kit. Sitting for a year probably didnt help.
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    Mercury 90 running super rough, fuel coming out from throats of carbs.

    Do a complete rebuild with rebuild kit for each carb. Just taking them apart usually doesnt work well and they will end up needing rebuilt anyway
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    1992 Sea Troller question

    Guess if I expect answers I should post some pics....
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    Engine turning over very slowly

    If the battery is actually reading 12 volts then you battery is almost dead!! Full battery should read 12.6 volts or higher.. At 12.3 volts a battery is half dead, anything 11.9 volts or less is considered dead. You need to charge up your battery to start
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    Gear Oil Questions

    Years back I switched to full synthetic gear lube...I know, another syn oil thread....nope, I found a definet improvement in shifting anf performance in both I/O mercruiser, and my Jonnyrude motors. I normall use the walleyworld oil as it is Valvoline gear oil. My recent purchase of a 92 Merc...
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