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    Merc 3.0 spits sputters dies when going into neutral

    No, the carb (at this point) isn't the cause of your issue. 3.0L uses a couple different routings for the lower shift cable depending on vintage/location of shift plate on the motor. Post your engine serial number/photos of the engine and shift plate and we can try to help more To satisfy my...
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    Pic of Milkshake spew all over my engine. Help please

    Based on your explanation of the winterizing process I am inclined to agree. Sounds like you got most if the water out if the block/ex manifolds but you make no mention of draining the intake (if this is required for your particular engine). Not all 4.3L intakes have a drain/require draining...
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    Engine dies after running for several minutes

    Probably time for a full tune up, points, condenser, cap/rotor, plugs, wires, fuel filters, etc..check and set dwell/timing/idle. Yes, if your setup is oem most likely the engine wire harness has the resistor wire in it. There is still an oem replacement for said wire if testing shows it to have...
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    Slow trim down plus sticks at halfway

    Sounds like either a power supply issue or the motor itself is failing. Battery full/good condition? There are multiple electrical connections on the trim pump assembly itself that are prone to corrosion as well
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    7.4mpi just started running rough and with gas coming out exhaust

    Correct. I'm still leaning towards a short to ground on the problem side of the engine wiring harness. OP: your continuity test sounds like you checked through the harness still connected to the ecm? You need to check between the injector leads and a ground with the harness disconnected, key off/on
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    5.0 mpi runs rough when wet

    Although the design of the engine is to be operated near water it isn't designed to be operated when doused with water. Your issue could be one or more things but first you should locate and repair the water leak(s), then check operation when the engine is allowed to operate without being wet
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    1989 Mercruiser 3.0 Cranking but no spark.

    Your problem is obvious Scott says, use all new parts. Heed this advice and as always, use oem
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    one drive slower to raise and lower than the other

    None As mentioned, check trim fluid reservoir. Ensure level is appropriate and check for leaks
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    Front engine mount wont go low enough to align gimbal bearing

    🤘
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    5.0GLPWTR, fuel pump question

    They are helpful
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    3.0 Mercruiser Choking

    Post #4.....
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    2007 3.0 Rattling/Timing

    Spec, dude. Spec I waxed on 2.5/3.0L motors in another thread. Not sure how to link it but the short answer is one of the greatest GM engines ever produced has gone through a few changes in it's 50+ year life span
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    7.4mpi just started running rough and with gas coming out exhaust

    The damper can fail without fuel present at the vacuum line. I think the only test aside from installing a new part is to rig a fuel line to that side of the motor/fuel rail that you can manually regulate. I've had this issue once and iirc that was one of the tests performed. It may mean...
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    port side exhaust elbow over heating.

    You can replace your risers and manifolds if you like but I don't think that is main cause of your issue. As mentioned, aftermarket stuff is great but it comes with the caveat of not oem which is part of the original design. The sea water pump in the drive most likely is failing, guess based on...
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    Drive stays in position where set downwards and upwards…but…

    You as well. Time on the water better spent than time in the shop, some days anyway
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    7.4mpi just started running rough and with gas coming out exhaust

    This rehashing makes me think there is a regulator/damper issue. Merc used a few different fuel supply rails/regulator/damper setup on these fantastic engines (seriously, love isn't a big enough word for my feelings about the 454). Fortunately merc used a fuel supply map in the mefi ecm to...
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    Problem with carburetor

    Glad it's sorted out, shame having to re used used old worn out parts. 5000 rpm is too much for your drive. Verify engine rpm with a shop tach and compare to dash tach/existing equipment
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    Exhaust bellows install Alpha one

    Common replacement part supplied by mercury (oem). Designed initially for small block engines with bravo 3 drives to alleviate runnability issues caused by excess exhaust draw/vacuum created by the counter rotated props. The bellows would collapse and not allow exhaust gases to properly exit the...
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    Need Help on 5.8fsi Couple of Issues

    Not likely, most map sensors are pretty solid Most likely you still have a vacuum/intake leak and the map sensor is reading a value outside common threshold hence the code You're on the right track with fuel pump pressure test, would recommend a fuel pump vacuum test as well including an...
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    Raw Water System Cap Leaking

    When you say "raw water cap" are you referring to the closed cooling/heat exchanger cap or the cover on the raw water pump?
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