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    1984 Mercruiser GM 350 engine no start, not even trying to fire

    Did you do compression test?
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    2008 Alpha one-gen. 2 Trim/tilt sensors

    If Scott is the only one who has worked on boat. I've inherited some creative wiring before, which was not fun to trouble shoot.
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    95 Mercruiser 4.3 water in oil

    22 years old? Was hatch open so that there was a possibility of rainwater getting into motor? Water over dam now, but before pulling parts, you should have performed compression test. It might have told you where to begin. That old of motor, I suspect it is time for tear down, and totally...
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    Need advice

    I'd get a junk yard core and Marine it up.
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    5.7L rebuild and upgrade to vortec heads

    that is not good.
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    5.7L rebuild and upgrade to vortec heads

    it seems to me if I was going for VT heads for a little more power, I'd stroke the motor as well, since a rebuild is being considered. BUT, if motor is saltwater cooled, I'd wait and when it finally gave up the ghost, I'd pitch it.
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    Totally baffling !!! Impeller replaced !! And not pumping

    I haven't worked on Alphas in some time, but if my old memory is correct, there is a tube (about 3/4" dia) that runs from lower unit to upper and there are o-rings or seals on it to make sure of good sealing pressure. If you dislodged tube, that may cause all of you issues.
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    Stalling at headway

    sounds like starving for fuel on high demand. check for blockage in fuel pick up tube and mud-dobber nest in fuel vent. Been there!
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    Totally baffling !!! Impeller replaced !! And not pumping

    u sure brass or keyway hasn't spun out.
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    5.7 Vortec Runs Great On Land but Bogs Under Load in Water

    check fuel vent for mud-dobber mud.
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    5.7 Vortec Runs Great On Land but Bogs Under Load in Water

    make sure all plugs are firing or you don't have a plug wire that has come loose. MC have some very sturdy engine mounts that can mislead boaters into thinking that all plugs are firing. Also, manually advance throttle while pointing timing light at timing tab to check if ignition is advancing.
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    Alpha Gen II Oil Supply Line Cracked and Leaking

    best pull drive. Besides you should check alignment and grease u joints. u will also need small hands. when replacing lube hose, use special ROUND clamps to secure new hose.
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    Mercruiser Alpha One Gen I Winterization

    Use a mirror to find block drains or you will have to remove manifolds/risers. I live in NW Florida where now it seldom freezes. Back in the day, when it did freeze from time to time, we wouldn't pull OD until spring in prep for the next season or bugs would have another access point. Some would...
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    Carburetor Issues, Dripping Carbs...

    It seems that years ago before FI, we had to adjust floats to reduce flooding. We would just bend fulcrum to achieve results. But, I haven't been into a quad-jet for some time.
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    Risers - think I caught this just in time?

    17 year old and you got that much usage? Must be fresh water used only. 5 years is about life expectancy of saltwater risers. Next time, you may want to invest in some muriatic acid to soak risers and then neutralize acid and soak in phosphoric acid (Ospho). Then acetone test them. This process...
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    Starting issue

    look for cracks in main leads as well. I have experienced one red battery cable getting a nick, and saltwater corrosion ate through the copper.
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    Whats wrong with my boat?

    when do you put load on boat while in reverse???? It may be more serious. If you question winterization, do a compression test to achieve some peace of mind. Water inside crank case is another concern to investigate. If these are ok, then check plugs for crud and carb and fuel line for crud...
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    1998 Mercruiser 5.0 Intake manifold gasket mismatch issues

    The intake does not fit heads. It is pretty obvious, and it never did according to original post. Former owner had problems. No kidding! Take photo of heads and manifold to a speed shop.
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    1998 Mercruiser 5.0 Intake manifold gasket mismatch issues

    I have never seen a serial # on intake manifold. Block and heads only...
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    Almost Sunk… where do I start to salvage boat

    You must find LEAK asap. I fear leak is due to rot. If so, it may not be worth the effort and $$$$$$$$$$$$$$$$$$$$$
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