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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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    What Trim Oil to use on 1993 Volvo Penta 230a SP CD TRIM

    Yo, B! Isn't "any oil better than no oil"? Ha, jokes aside, as mentioned use what oil currently exists in the system. Red = ATF, brown = motor oil. Yes, sae 30 is recommended and I personally believe thus is due to most boaters having a full/partial quart of motor oil on board
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    Need Volvo Penta Tilt/Trim relay 6-wire Trimmer Sp-c 7938450-9 & Wiring Harness

    If your mechanic cannot source the needed parts you should find a new mechanic We are not here to sell you parts, only here for useful info/direction
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    Volvo Penta AQ125/270 overheating raw water not pumping

    Volvo used/uses many different shapes/styles/sizes of sea water pumps and impellers. Best bet is to procure oem and verify by eye exact fit As mentioned, check entire raw water side of cooling system for debris/blockage. Also, be absolutely positive about closed cooling water (circ) pump...
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    Water in 4 cylinders

    Good news! Keep up with routine maintenance/engine/drive monitoring
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    5.0GLPWTR, fuel pump question

    Thank you for follow up, glad you're back on the water Did you perchance check fuel pump pressure/vacuum? And if so what were the #'s?
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    160 to 165 Mercruiser manifolds and backfiring

    OP: as mentioned you need to check/adjust valve lash. I kinda figured you did this already but my faux pas for assuming such. FYI myself and others here have had issues with electronic ignition upgrades. Aftermarket sellers give all kinds of info/advice about external components regarding their...
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    160 to 165 Mercruiser manifolds and backfiring

    Before you (and i) were born I have a cute story about my dwell meter acquisition, if you ask nicely I'll share
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    Front engine mount wont go low enough to align gimbal bearing

    No, there are replacement parts available but your issue supercedes this step 1974...as mentioned your boat most likely has suffered transom/stringer rot. Remove the engine/transom assy and study up/post in the restoration forum
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    7.4mpi just started running rough and with gas coming out exhaust

    This is good practice. Keep going, next is key off check continuity on injector leads to ecm/ ground. It's rare for an ecm to go bad. It does happen but you need to rule out all possibilities besides spending big $ just to find out there's a broken/melted/unconnected wire or something else...
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    2007 3.0 Rattling/Timing

    ......
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    2007 3.0 Rattling/Timing

    Oof! This is the last step in engine replacement troubleshooting, at this point you should contact your local marine repair/engine replacement specialist./s
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    Problem with carburetor

    Carb rebuild (?) gone wrong with mis adjusted float height possible. What is "I now get 5000rpm out of it from 4700" ?
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    2007 3.0 Rattling/Timing

    Cool Check/replace your filter(s). Do your fuel expenditure program and keep up with routine maintenance. If still running poor investigate further
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    2007 3.0 Rattling/Timing

    Kinda crummy pic but plugs look wet. Again, can't see much much but for new plugs they look a bit rich Guess is carb is adjusted rich for decent idle but running lean at higher rpm. I'd look into fuel delivery, i.e. fuel pump pressure and vacuum. Have you inspected contents/replaced fuel filters?
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    1989 Mercruiser 3.0 Cranking but no spark.

    This is #1 thing to inspect on a points system with no spark.... There is a troubleshooting guide in the stickies, top of forum page. Great reading in there for the curious ones
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    port side exhaust elbow over heating.

    Yeah, what was temp? Riser hot again? Replace boot for sure and flappers, they're toast. New gaskets in order for riser/elbow too. Better inspect other side as well
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    Ford 302 50 amp wiring

    Wow, full circle here OP: you mention first 50A breaker wiring (which is understood by many here) then mention solenoid (which was referred to from member and is again, understood by many here) So....which is it? (breaker or solenoid)
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