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    454 Low Vacuum + Flutter?

    Yep Then totally get it to top performance level. We're talkin straight up hp, torque and economy! GM makes amazing products that transcend decades. Can't wait for folks to add information about all their decrepit cars they've kept alive, somehow....
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    1996 SeaRay 215 Express Cruiser electrical issue

    Sounds like a connection issue, most likely corrosion on one or more positive or ground connections. Have you performed a voltage drop test on any circuits?
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    Mercruiser 140 1976 Down trim limit.

    There is no down limit, down is down/in Most sterndrive operators learn to listen for the change in tine of the pump while idling in a ni wake zone. Thus lets them know the drive is full down/in. When getting on plane you then trim up/out to the desired angle for best planing/operation. The up...
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    Should I use thread sealant when installing new trim hoses?

    The fittings are flared and require no thread sealant
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    Bravo 3 Measurement Request

    You bet :) Enjoy your project, I'll keep my duct tape
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    Bravo 3 Measurement Request

    I've found duct tape to be superior to any strap covering, oem or otherwise Works good on older aq vovlo drives too, for those that cross post here
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    Alternator wiring issues

    50 amp breaker is ubiquitous on mercs. 90 amp fuse was added 20+ years ago as a failsafe towards alternator/main harness circuitry Not exactly necessary but according to nmma/marketing/liability it's a part that makes sense
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    Spark plug heat range

    Plugs look fine to me, as usual. If anything a bit rich but nothing to fret over Would guess based on mid range stumble as the complaint the power valve spring is too tight or there's debris in the lower port Not a bad time to check/re adjust valve springs given the post break in near 100 hrs mark
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    Alternator wiring issues

    Fuse needs to be mounted on the starter main post with alternator and main 12 volt harness supply on the output side to protect not just the reg/rectifier on the alternator but also the main harness and associated circuitry Older models did not have the fuse so its possible to abate the fuse...
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    Installing driveshaft housing on to bell housing Bravo 3- do I need sealant between housings? + what kind of grease for shaft?

    The snout on the driveshaft housing seals against the aft side if the u joint bellows. The retainer ring in the snout fits inside the bellows keeper ring allowing the drive and bellows to seal Other than that the o ring kit seals the water passage, gear oil passage and shift cable...
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    RE: Issues with Mercruiser 5.0 LX 4 Barrel Carb

    Just to be sure when you disconnect the shift interrupt is it at the shift plate mounted to the engine/riser? Long thread and forget all that's been done but have you checked/replaced the spark plugs? Firing order correct? Check/set timing/idle?
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    RE: Issues with Mercruiser 5.0 LX 4 Barrel Carb

    Has nothing to do with alignment, it's most likely the shift interrupt switch engaging incorrectly due to a worn/faulty lower shift cable When you say motor doesn't crank do you mean it won't turn over or won't start/run?
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    RE: Issues with Mercruiser 5.0 LX 4 Barrel Carb

    I've found optima batteries to be one of the most unreliable brands out there, ymmv
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    Quicksilver transom assembly replacement

    A 2A prefix serial number is of later vintage than 2008 for sure, how new I do not know but would guess within last 5ish years? Being a quicksilver brand with boat located overseas from US would guess that it's more a global product identifier than mercury brand. Yes still both brands made in...
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    350 mag mpi strange fuel pump relay problem

    Have you checked the fuses located in part A of the wiring diagram you posted ?
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    RE: Issues with Mercruiser 5.0 LX 4 Barrel Carb

    Broken wire aside you need to get rid of that post clamp and get a real battery with threaded posts
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    Oil Drain plug

    The threads are stripped or the hex head? If the hex is stripped use a vice grip and heat. If threads are done you may need a new pan, or at least a new insert for the plug. Water in the crankcase for years sounds detrimental to the crank/rod bearings and who knows what else. You may be...
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    RE: Issues with Mercruiser 5.0 LX 4 Barrel Carb

    Check for melting where the lower cable runs next to the exhaust May be time to replace it, they're good for 5-10 years on average
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    RE: Issues with Mercruiser 5.0 LX 4 Barrel Carb

    Its the one on the bell housing between the water outlet port on the drive and the bell housing. Which if misplaced or missing would leak at that seam, but probably still pump water up to the t Stat housing. Like others have said you most likely have a melted lower shift cable and that is what...
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    Rochester 2gv

    That's a mercury pubIished book but more like an owners manual. Still good info but not as detailed as a fsm. Ebay would be my first source if I needed manual 1, 2 or 3. Start there
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