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    2008 4.3 ltr mercruiser overheating alarm

    the over temp switch. i'm not sure what the spec temp is for activating the switch, though 175 does seem low
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    Mercruiser 3 button trim switch

    have you inspected/tested the solenoid?
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    Mercruise stalls when put into gear

    could be: -shift cable worn and causing shift interrupt switch to improperly engage -carburetor/fuel supply issue(s) -ignition issue(s) -etc..... have you performed any routine maintenance lately?
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    Burned valve or worse 1997 5.7 LX

    appears to be witness marks of some seepage past the head gasket at the cooling ports you mentioned the head bolts did not seem to be as tight as you'd expect, perhaps this was the source of water intrusion
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    Alpha 1 Gen 2 upper gear preload

    yes, you need an lb/in dial torque wrench, perhaps you could borrow one or take the assy to a local reputable shop that works on mercruiser drives and have them set the rolling torque iirc, the rolling torque spec for USED bearings is 3-7 lb/in, best to try for 5 lb/in
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    Burned valve or worse 1997 5.7 LX

    valve looks tuliped, piston looks washed. probably from water entering combustion chamber i would check the exhaust manifolds and risers for leaks
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    Mercruiser 3.0 Alfa One not starting

    i don't discuss cars on this forum all mercruiser carbureted engines come with an oem choke that can be set when attempting to start. the remote handle ought to have a throttle only setting, again an oem feature
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    Mercruiser 3.0 Alfa One not starting

    have you set the choke and pumped the throttle when attempting to start?
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    93 3.0L Merc Tune up Kit

    post the engine serial number. there are folks here who can direct you to the proper schematics/info for your ignition system and components
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    Alpha 1 Gen 2 Trim Question

    if there is an issue with lack of pressure you would most likely see a leak, have low oil in the reservoir and the drive would not stay in the trailer position during storage also, if there is an issue, operation the boat in FWD gear would force the drive to the down/in position due to physics...
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    Burned valve or worse 1997 5.7 LX

    possibly a valve/piston/head gasket issue with just #3. won't know for sure til you pull the head. water intrusion to the combustion chamber can cause increased combustion chamber temps as well timing advance curves are relative to the engine, not the boat. mercruiser has no idea what kind of...
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    5.7 GXI-A Hesitation and loss of WOT

    have you checked fuel pressure and vacuum? when you replaced the spark plugs did you also replace cap/rotor? did you inspect the contents of the fuel filter(s)?
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    Merc 454 loss of oil pressure

    need to located source of leak, oil in the bilge after initial run after rebuild over the course of a short time span indicates a severe oil leak. should be pretty easy to identify source. 20 psi for oil pressure is still enough to ensure no damage occurred to the internals, my guess is that...
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    Mercruiser alpha 1 gen 1 shifting issue, regarding shift cable barrel adjuster with locknut (not the larger brass one)

    no, the threaded tube you are referring to is independent from the inner cable which provides the shifting. even if the threaded tube moved from its normal, locked position from the outer sheath end the distance between the trunion and inner cable plastic end would remain the same. this is...
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    350 mag 5.7l skipping

    mercury has a few different specs for fuel pressure but generally they are around 40 psi for mpi engines be sure to take pressure readings throughout the rpm range and under a load, pressure should remain constant and not exhibit any major swings in readings
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    Volvo 290DP Trim will go down not up

    i would first try swapping the relays, if the drive goes up but not down then you've found the issue
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    Mercruiser alpha 1 gen 1 shifting issue, regarding shift cable barrel adjuster with locknut (not the larger brass one)

    there are two shift cables in a mercruiser sterndrive system one from the remote control at the helm to the shift plate on the engine and one from the shift plate to the bellhousing in the transom assy. known by the terms remote cable and lower shift cable the item you have circled in the...
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    350 mag 5.7l skipping

    the only fuel pressure tester port i've seen on a merc mpi is a shrader valve style on the fuel rail can't say ive ever seen a fuel pressure tester port on or near a fuel filter, the closest would be an in-line adapter used on a carburetor that threads into the filter housing at the carb inlet
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    350 mag 5.7l skipping

    is the engine efi/mpi or carbureted?
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    Where to Buy

    valve cover gasket should be fairly easy to source, 3.0L engines have not changed much over the years you can easily make a gasket for the end cap, just get gasket material and cut it to fit with a razor the end cap is going to be difficult to find, very little chance of finding an oem part...
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