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  1. Fun Times

    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    Yes, it seems time to open up the drive to replace the impeller and inspect other water flow components ...Post the serial when you get a chance. Here should be your engine parts list, https://www.mercruiserparts.com/4-5l-mpi-250-alpha-bravo-2a441953-thru-2a530777...
  2. Fun Times

    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    What model stern drive is on the boat? Is there a serial number on the drive itself and transom assembly too by chance?
  3. Fun Times

    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    Maybe I missed it but thus far i haven't noticed 12.9inHg in any of the screenshots...Saw 17.2 under Manifold pressure at idle of 6.22 RPM? Maybe the new TMAP sensor changed the readings and hadn't really noticed it yet? Yes, you can run with the vacuum line disconnected for a bit to test as...
  4. Fun Times

    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    With 600+ hours, is this a fresh or salt water boat mostly? If you haven’t, pull the small vacuum line off the fuel regulator and see if it’s dripping fuel.. Pull and check your Positive Crankcase Ventilation Valve for rattling sounds, etc.. Another area that warrants opening up for...
  5. Fun Times

    Engine is gas lighting me

    Theory/s... Looking at the design of your oil dipstick to oil pan configuration, one thought could be how was the condition of the old oil from the first oil change and even if it was ok (not milky), did the old oil get stuck within the fitting flow characteristics and then become temperature...
  6. Fun Times

    Service manual help

    Where did you locate the b830792 number in your first post?
  7. Fun Times

    Livorsi Wire harness diagram

    Did your online search of something close to “Livorsi marine Wire harness diagram livorsi emc eec0016062” get you close to finding a pin layout that may possibly work on your model? Though it may not be listed mostly because of the manufacturer involved vs possibly some others out there that...
  8. Fun Times

    Exhaust bellow slipped off

    Hopefully without too much of a thread highjack scenario here, by chance Muc, Jmunk and any others, do you all know of any floating rumors out there of the quicksilver bellows adhesive not holding up (or should I say on) like years past? I have been seeing on different, active MerCruiser...
  9. Fun Times

    Exhaust bellow slipped off

    The exhaust bellows down under the U-joint bellows? Often without using the mercruiser exhaust bellows install tool, and following the guidance of the Alpha, Gen 2 service manual number 14, the exhaust bellows has a tendency to keep slipping off if only tried by hand to install. The stern drive...
  10. Fun Times

    Service manual help

    Hum, Well I now hope it's not too late as far as you ordering up a mercruiser service manual only because in re-researching this out I just noticed that technically the wrong service manual was suggested within the online Mercruiser parts catalog websites for you 0B830792 serial number that I...
  11. Fun Times

    Service manual help

    To share a link, copy the website's address from your browser, then paste it directly into the forum's text editor using the Insert Link tool or by highlighting your own text and pressing Ctrl + V(Windows) or Command + V (Mac). [1, 2] . Copy the URL Go to the webpage you want to share, click...
  12. Fun Times

    gen 2 or gen 1

    0D496768 comes up as an 1991, Gen 2 transom assembly, model number 6010000DS…Here’s a matching parts catalog that would cover the original stern drive too if you happen to know the gear ratio. https://www.mercruiserparts.com/alpha-one-gen-ii-1991-1995-0d469859-thru-0f679999
  13. Fun Times

    Service manual help

    Hi, your engine serial number 0B830792 brings your model number up to be 474S110AS which helps show your engine year to be 1988 model year 7.4L BRAVO drive... The engine service manual would be merc part number 90-816463 otherwise known as manual number 15...
  14. Fun Times

    Popping noise when lowering outdrive

    Possibly...Call them and if possible, try to talk to Ron the owner as according to a friend not long ago (a week ago), he was able to talk to the owner Ron and was guided along nicely with his questions. (y)
  15. Fun Times

    Popping noise when lowering outdrive

    Was going to mention with hitting something recently it may have bent the gimbal ring but if it was rubbing that much before and after a replacement then maybe an old hit happened too... For some visual references, the following few links may help with some measuring and things to check to see...
  16. Fun Times

    persistant overheating issue.

    Yes. buy a new thermostat then check it the same way you do before you install it as it may help give some indication…. 188 is to warm.
  17. Fun Times

    persistant overheating issue.

    Might be worth trying a new or another new? Thermostat being yours seems to open at 180 vs the recommended 170 these use from stock… https://www.perfprotech.com/thermostat-864493/product/188250 Does it only get hot and sound the alarm when under way on the water, (< what RPM sets it off?)...
  18. Fun Times

    MC-1 bellows kit

    Yes, OEM are still available... the preferred option would be you'd be looking for Merc part number 60932A-4 - Bellows Assembly or if needed aftermarket Sierra marine part number 18-2751. Item number 14 (and maybe 19 too for the exhaust bellows)...
  19. Fun Times

    Cannot get outdrive installed to the last 1/2 inch - need your advice!

    I'm going to go with that... :D
  20. Fun Times

    2005 Mercruiser 5.0L MPI (Bravo 3) - Question about changing Mainfolds/Elbows

    New fittings should already come with 92-809822 Loctite 567 PST Thread Sealant put on, sort of like what appears the other drain fitting has on it that you showed that came with the new kit.... https://www.ebay.com/sch/i.html?_nkw=22-863786A1+&_sacat=0&_from=R40&_trksid=p2332490.m570.l1313
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