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    Heat Exchanger blocked: recommendations how to flush or unclog?

    My Bravos had crank water pickup pumps and were easy to access and replaced impellers before I went inside, HE. I suspected former owner never rodded out HE because I did find small impeller debris in a few of the HX holes. I rodded out and then use air hose to remove most of the rest.
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    Bravo One U-Bolt

    Never knew---thx!
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    What reason causes the engine milky oil?

    Make sure water is not coming from hatch and leaking on top and into motor. Been there! If raw water-cooled pull risers and look for signs. Do compression test on motor.
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    Bravo One U-Bolt

    Drill and use ez-out to remove. Thank me later!
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    1990 Bayliner 2651 resto

    did you sink boat in salt water? It looks like it was submerged for some time???
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    1995 5.7 Mercruiser no start, no fire.

    bad coil????
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    08 5.0 mpi (alpha 1 gen2 ) engine sputters initially under load but will clear up after some use. Cranks and idles fine though.

    You might have a coolant leak into a combustion chamber?
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    Oil pressure

    If mechanical shows constant oil pressure in tune with normal readings as engine warms, then something else is defective in your other gauge or wiring. Pray you don't need a motor tear down and new bearings.
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    Oil pressure

    add an oil pressure gauge manually back at engine.
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    Throttle lever issues. Replace or repair

    Layup may have allowed corrosion or restriction somewhere else. Disconnect carb linkage and test if lever moves w/o excessive resistance.
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    1989 Mercruiser 350 alpha one stalls when shifting

    If there is any slop, fix or replace. Been there....
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    Starter wont engage flywheel.

    :Pull # 1 plug wire and check for FIRE!
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    Testing transom assembly for leaks

    if he rebuilt wood/glass transom OR/AND installed a rebuilt MC Transom assembly (not drive installed), I WOULD. Safer than sorry.... I have used the bilge fill technique with y pipes installed just to be sure o ring didn't slip out when I was installing everything. I have never had a problem...
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    Testing transom assembly for leaks

    I have done this test more than once. I don't fill bilge to where water runs into drive shaft opening. You have to monitor water filling, but it works. Then, install motor.
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    Starter wont engage flywheel.

    Did you replace or move distributor/wires? If Chevy V8, bring #1 cylinder to top on compression and check where distributor rotor is point to.
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    Starter wont engage flywheel.

    Pray it is not flywheel ring gear. Does starter require shims? Compare old starter to new one. Vendor may have sold you a different starter.
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    Testing transom assembly for leaks

    Metal transom or stern of boat? Fill bilge with water after plugging y pipe hole and see if there any leaks.
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    Water in upper unit

    You may be able to get professional TIG welder to clean and weld back corrosion. However, if impregnated with salt, I'd replace.
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    Hose leak at trim pump oil reservoir

    Scott is mostly correct unless threads are leaking. Most of the time they don't. Sometimes fatigue or dissimilar metals will cause issues. I always use Teflon or liquid Teflon (sparingly). (IF I CANNOT STOP LEAK AND LAST RESORT)
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    Water in upper unit

    If not bellows, the fwd drive shaft seal may be allowing spray to get in via hatches.
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