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    Repeated impeller failures, help

    20 year old boat? Is it salt water used? Water may be getting past internal seals around tube due to corrosion of metal. Or, you have incorrectly installed it. I'd lean more on corrosion causing issues. I am not real sure on B3s plumbing, but I had an 86 MC that had a similar tube issue. If this...
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    Mercury wear pads missing cause of vibration?

    You will need more! LOL
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    fuel pump frustration

    Sierra...web search... Under 200$ last time I bought and no headaches. You will have to add special oil sender designed to electric pumps.
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    Mercury wear pads missing cause of vibration?

    I now remember those but I thought that they were just shims to make a better alignment or a tighter fit...
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    Mercury wear pads missing cause of vibration?

    I had a gen 2 but don't recall seeing them. Mine didn't vibrate. Hum...
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    1969 Mako cut and gut project by Lectro88

    I discovered by accident that a 2-3" small nap paint roller works better to roll glass/cloth and forces resin into weave and removes bubbles. I buy the cheapest ones from Home depot. Lowes are more expensive. I discard after use and just clean the roller tool.
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    Mercury wear pads missing cause of vibration?

    What are wear pads?????????? Maybe I am referring to something else???
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    Mercury wear pads missing cause of vibration?

    In gear is when you have a load on motor and LOW rpms. MCs have a very good motor anchoring mounts, not like a car's. I have been fooled by bad wires or plugs too on a boat motor.
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    Mercury wear pads missing cause of vibration?

    I suspect bad plug or wire somewhere. Pull wires at low RPMs and see if motor noise/rpm changes.
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    Fluid in the bilge

    Or trim fluid. U checked fluid levels, yet????
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    Losing Power - After two hours

    Check fuel filters, including inside fuel pick up tube for crap. Also check fuel vent for obstruction like mid-dobber nest. Been there!!!!!
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    Engine replacement

    get you some acetone, plug risers and manifolds and test for leaks. If no leaks, I suspect head corroded like mine did and hydro-ed your motor.
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    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    U should also have a canister type water/fuel separator filter, at least all of my carbureted Mercruiser had them. Go buy a cheap automotive electric fuel pump and pump some gas into bucket. If a 6-7 fuel E pump starves for fuel, I'd suspect something is plugged up. Just my 2 cents. Good luck!
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    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    Yours may have clogged inline fuel filters. Mine did. Pain in the butt to get them out....
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    Alpha One Gen II Shifting

    with a friend at helm, make sure interrupt switch is working. u could have damaged wire going back to coil. if my memory serves me correctly, an interrupt 12 vt wire goes back to coil. or, switch went bad????
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    At full throttle and it died...

    I had crap in fuel lines/gas tank internal filters one time that gave me headaches. Pump sucked all the crap from sitting a year or so and it all damned up fuel lines.
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    fuel pump frustration

    Be advised: I experienced major issues with automotive pumps. I finally installed Sierra's MP and issues went away. My boats former owner had installed auto Fuel pumps and no oil pressure switch cut off and wiring, which was dangerous as well.
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    Help with charging system?

    For peace of mind, take alternator to REPUTABLE shop and test it under loads so that you can have a base line. However, I suspect corrosion somewhere in wiring or connectors.
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    What is being aligned, the engine, or the bearing, or both? And why?

    Follow specific instructions for your OD. Some bearings are sealed and some have alignment marks for grease coming from grease fittings. sometime the outer ring get "bumped" when installing complete bearing and is not perfect to the inner. Insert alignment tool and if it doesn't go in, hit tool...
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    New motor knocking???

    lot cheaper than a 300 hp Yamie(s) ! But, if I had an extra 60 grand, I have a set installed to replace my strokers/bravos.
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