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    Diagnosing trim gauge issues

    FYI, alpha one gen 2 requires a rolling torque wrench to set bearing preload upon yoke seal replacement
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    Hot Elbow with New Manifolds and Smoking

    190 vs 150 psi is a notable difference. Which cylinders were lower number psi? If there's no change in idle speed/runability with adjusting the idle air mixture then either the idle speed set screw is out of adjustment or the idle air mix circuit in the carb base is clogged/faulty adjustment...
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    Cooling system question

    If that's your only issue your best option is to find a new mechanic. Any decent mechanic ought to have access to the proper oem specs regarding what they are working on The only questions your mechanic should be asking you are ones related to a complaint/concern regarding an issue you have...
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    Cooling system question

    Hopefully the mechanic that performed the long block r and r saved the serial number tag(s). In your case it's the best piece of info for folks here to determine what the factory setup was/is. Pictures are the next best thing for ID/best route for troubleshooting issues. Speaking of which...
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    Cooling system question

    Was the motor you purchased a bobtail (complete/fully dressed) or a just a long block?
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    Cooling system question

    Depends on serial number/vintage and if your setup is oem/factory or has been altered If you post a s/n and some pics that'll help greatly to providing information
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    Serial number

    If you have access to sierra brand parts they sell a flexible fuel line with the proper end fittings that is acceptable to use between the fuel pump and carburetor
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    bought a kicker motor

    Rigging tube. Available at/through mist boat dealers
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    Belt Size or Part # for a 1985 Mercruiser 3.0 Alpha One Gen One

    Sierra sells, or at least used to, a flexible pressure rated fuel line with proper end connections for mechanical fuel pumps. Hose clamps are not acceptable for the pressure side of the fuel pump, only the vacuum side
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    Trim Manual

    R/MR/Alpha One is #6. Gen II is #14. If an older MC-1 drive would be #1, 2, or 3 depending on model/serial number Bravo is #11, 28, 39 or the latest aptly named Bravo Sterndrive manual
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    Thread repair on Bell Housing

    Quite sure you can get a helicoil kit for 1/4-18 NPS. Google ought to guide you properly If you go the other suggested route drill size for 1/4-18 NPS is 7/16"
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    Belt Size or Part # for a 1985 Mercruiser 3.0 Alpha One Gen One

    Lol, seems to me this is exactly what you are doing Napa supplies seirra parts. You can buy/order the correct components from them and only have to purchase them once. FYI, save the fuel line connection from the old fuel pump. You will need it to connect the proper fuel line between the pump...
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    Low fuel pressure, fuel filter half full while idling.

    OP already has a thread regarding this (among other) issue(s)? Regardless, agree with dodge and would add a vacuum test on the fuel supply could reveal a restriction prior to the fuel pump
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    Started, died and wont restart

    Only if there is an air gap Personally, I use a jumper wire clipped to a solid block ground with the other end clipped to the coil wire tang that connects to the distributor. Never had an issue this way
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    First Start of the year and High Oil Pressure

    Being an efi engine the alarm could be for any number of issues, low oil pressure included along with afore mentioned coolant temperature and gear lube monitor level. The only way to know for sure the cause of the alarm is to use a diagnostic tool that can read fault codes. It's possible the...
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    Belt Size or Part # for a 1985 Mercruiser 3.0 Alpha One Gen One

    Remove the belt and take it to your local auto parts store, they ought to be able to match it Your fuel pump setup is a recipe for disaster. You need pressure rated fuel line and connections between the pump and carburetor along with some type of automatic safety switch that will eliminate...
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    MerCruiser 5.0 MPI diagnostic connector

    No, anything mercruiser produced after mefi (555 or later) does not have the capability of "winky blinky" technology. At least not without the proper diagnostic equipment If you want to view fault codes you need at least diacom/rinda or mercs proprietary cds. Neither of which will tell you...
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    Oil in bellows

    Possible, as mentioned a pressure test can reveal a leak at the yoke seal which would account for the issue but ime a small amount like in your picture doesn't often result in the yoke seal failing a pressure test. Not to say passing a pressure test rules out the yoke seal but the nature of...
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    Diagnosing trim gauge issues

    The sender for the trim guage is most likely the culprit in your case. It's often the number one cause in most trim indication issues. By verifying the guage is operational you now have sender wiring and the sender itself as focus You can test sender output with an ohm meter connected to the...
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    Stalling and Starting problems

    When was the last full tune up? FYI there is no fuel additive that can alter the quality of present fuel in a positive way i.e. make fuel fresh/good again. Best practice is to stabilize fresh fuel in the system especially if it's known to be unused for longer periods
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