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    470 swap to 4.3

    Is there a problem with the 470? You can always get home with the kicker Cool boat, btw
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    What's The Trick Mating Lower to Upper Drive??

    This guy answers his own question. The study is apt questions/answers for life to prolonged
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    Mercruiser 233 Overheating--Out of Ideas

    Recent pics show fairly deteriorated gasket You removed the newly installed base and gasket to discover this?
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    MerCruiser model 496 MAG (H.O.) 425 HP loss of power

    Could be time for a new mechanic seeing as how you are seeking advice online. Based on symptoms and work performed I'd start looking at ignition. 496 is notorious for coil and ignition driver failures
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    Alpha 1 Water Leak into Boat, from Exhaust Ports? (videos)

    Probably have an exhaust leak and trim line manifold gasket leak Both easily fixable but the exhaust requires pulling the motor. At that point it'll be wise to repair the most likely rotten transom
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    omc v mercruiser

    A pontoon with a sterndrive is a walk away, get one with an outboard Unless you want to work on it and realize engineers don't care And if you really want to have fun get an omc
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    Exhaust component inspection due to slight overheating

    Flappers are toast Good on the impeller replace WAG is there is a blockage before/after the raw water pump Is this a salt water boat?
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    Vista 275 2013 Mercury engine 350

    At this point, based on information given your best option is to use a diagnostic tool to check the fault history on the ecm. This will tell you the cause of the alarm and which avenue to proceed for further troubleshooting. Seeing as how you mention the rpms decrease and the engine starts to...
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    Vista 275 2013 Mercury engine 350

    Is this efi or carbureted? The alarm can be a few different things depending whether efi or carbureted. Are all the guages reading within safe limits when you have the issue?
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    Vista 275 2013 Mercury engine 350

    There are many different exhaust problems of which there are different symptoms and solutions. It would help to know exactly what you are experiencing to point you in the right direction
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    Mercruiser 5.0 crankshaft front oil seal replacement

    Most boats I've seen don't have near enough room in front of the engine to get a proper tool to successfully pull/install the seal. Being most likely a plastic timing cover I would be suspect of damaging the cover. Seeing as how it's highly recommended to replace it when it's removed I would...
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    Quicksilver 3000 Classic w/trailering button: Replacement options

    Oem new replacement control will require new cables and possibility of drilling/grinding fiberglass to fit properly. There are aftermarket new options but they don't have the same quality as oem and will most likely require drilling/grinding Try searching ebay/private seller for direct...
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    Engine cooling water in tube bigger than gimbal housng tube

    It's a bushing, looks much like one for the trim ram ends but isn't tapered. Really no need for the oem part, one could be fashioned easily with the right material. Just need to ensure the fit is sound so it stays in place
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    Engine cooling water in tube bigger than gimbal housng tube

    The tube is oem/factory Some alphas had a bushing that makes up for the difference in ID between the hose and barb. OP needs to look for it in the bilge or elsewhere. Can't imagine it'd be obviously missed when the hose was removed
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    Engine cooling water in tube bigger than gimbal housng tube

    There's a bushing that goes on the through transom barb so the larger hose doesn't squeeze down to fit on the barb itself Newer alpha packages have a specific hose that has a smaller ID at the barb fitting
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    2001 wellcraft 270 costal powered by a mercruiser 7.4 mpi with a bravo 3. Doesn’t accelerate.

    Engine coupler hub failing?
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    Problem with a Mercruiser 5.7 V8 LX

    Can say with absolute certainty the number one likely cause if no/weak/inconsistent spark on a thunderbolt is the ignition sensor in the distributor. Not saying that is your issue or to just arbitrarily replace it however there is a step in the troubleshooting guide for testing the sensor You...
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    Problem with a Mercruiser 5.7 V8 LX

    Third step from the top suggests checking voltage, in your case it's not 0 volts but low voltage. Treat it the same as 0 volts and inspect wiring harness, instruments and wiring, battery and connections, etc... My WAG is your issue is a weak battery/poor connections coupled with a possible...
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    Problem with a Mercruiser 5.7 V8 LX

    There's a troubleshooting guide posted in the linked thunderbolt write up
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    Did research re slow trim tilt but…

    Yeah, based on the pictures that's the first thing to do.....
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