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    Bravo 3 Oil Leak - Oh No !!!

    Recommend interval is 50-100 hrs or every season per merc. More often for high use, commercial or extended low rpm uses. Inspect bellows for wear/water intrusion, gimbal bearing, engine alignment, coupler wear and grease. As stated above, I also use a dollop of grease with a long screwdriver to...
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    1990 MeriCrusier 3.0

    Follow the troubleshooting guide in the stickies for engine's starting system
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    Bravo 3 Oil Leak - Oh No !!!

    This has been the cause for oil and water leaks for me in the past. Not often but it does happen. The idea is that bellows adhesive be used sparingly to only hold the o rings in place during drive install. The o rings, when seated in the shouldered areas do the sealing, excess adhesive...
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    Water in Engine

    Failure of water shutters could very well be the cause of your hydrolock, especially since both sides were affected. This does not rule out failed manifolds/risers on both sides either. With log style manifolds, which I'm guessing you have given the vintage, the shutters are located near the...
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    1990 MeriCrusier 3.0

    Turn over = crank. Are you saying the engine turns over/cranks but does not always start/run? Or The engine occasionally turns over/cranks, but not always?
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    07 5.0GL WOT Issue

    When was the last full tune up?
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    Mc-1 wont go all the way

    Your engine/drive is old, right? Like 45ish + years old Some of the oem couplers from that era did not have relief holes for excess grease in the coupler. Idea back then was the boat didn't last more than ten years, appropriate maintenance assumed. Kudos on attempting this revival, lessen the...
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    Gimbal bearing seal question.

    Yes And, no. Unless somehow the seal gets pulled out with the bearing
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    Water in Engine

    40 year old boat with original engine/drive, equipment, etc...? You keep up with routine maintenance?
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    7.4mpi just started running rough and with gas coming out exhaust

    Understood, however imo this is, aside from a live data reading/fault status check, the best way to troubleshoot your issue based on info provided. FYI, all merc mefi controlled 7.4MPI engines use batch fire injector control
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    Penta 5.7 256 SSX wont start

    Yes And you make no mention of checking/replacing fuel filter(s). After this, a vacuum test of the fuel supply system is in order.
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    Mercruiser 7.4 Dipstick Tube Broke, Can't Remove Oil Pan

    Yep, tube is garbage anyway. You're not going to hurt anything lower end internal by forcing the pan off. Just make sure you don't damage the pan
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    Lifespan of the engine circulating pump? Preventative maintenance

    No recommended interval. Most circ pumps get replaced for leaking shaft seal(s), bearing failure, overheating issues, etc.... Can't say as to knowing when/if a circ pump has been replaced other than mismatched paint, witness marks on bolt heads, excess seal shellac, paperwork....
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    Bravo 3 Oil Leak - Oh No !!!

    I've never been able to remove a gear lube line from a barb fitting without first slicing it lengthwise along the barb, brass or otherwise. Years ago I stopped installing any clamp device on the hose when replacing them. No leaks as of yet. Ymmv The quicksilver product packaging refers to the...
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    7.4mpi just started running rough and with gas coming out exhaust

    Mefi system uses a batch fire for injector pulse meaning an odd/even fire for injectors. It does not pulse each injector individually during the timing/pulse/firing cycle of the engine. 7.4L engines really like fuel, plus fuel works great to cool the combustion chamber so merc decided to map a...
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    Seriously stuck gimbal bearing

    Engine must be removed first in order to remove the transom assy
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    Seized engine

    I believe they meant "probe", as in use a wire or other small pick style tool to dislodge any debris to allow full draining of cooling water
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    Oil change on TKS 3.0.

    Whenever you like, 10-25 hrs is standard on most new marine engines
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    Need Assistance to Diagnose Bravo 3 - 5.0L MPI Vibration

    Ensure firing order is correct
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    Mercruiser issues with alarm and guardian mode

    What is the sea water pressure reading when the alarm sounds?
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