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  1. AShipShow

    Mercruiser 496 MAG Refresh Thread

    Hi to all the Merc experts out there... I'm in the process of giving my new-to-me 496 MAG (0W358880) a good once over since I have it out of my boat. I figured instead of creating a bunch of new posts whenever I come across something, I'd just start a general thread that I can ask the questions...
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    Replacement Exhaust Manifolds for Merc 496

    Does anyone have any recommendations for a decent aftermarket option for exhaust manifolds? I'm thinking of replacing them on my 2006 project boat and I don't know if they've ever been replaced so looking at doing it as a preventative measure, but I don't love the almost $1500 price tag for OEM...
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    Merc 496 Mag Compression and Leakdown Results

    Hi all, I'm tearing into my new-to-me 496 mag (0W358880) and did a compression test and leak down test. The motor has been sitting winterized for about 3 years so wasn't sure what to expect. The motor is currently in a cradle in my garage, not in the boat The compression results were from...
  4. AShipShow

    NLA Mercruiser Parts

    Hi all.. I'm not sure how useful this is, or if its already posted somewhere, but I thought this might be of use for those of you that are trying to source parts that are no longer available from Mercury/Mercruiser. I ran into this issue trying to find a fuel rail for a 496 MAG (8.1L). This is...
  5. AShipShow

    Bravo 3 Refresh Questions

    Hey guys, Just a bit of quick background: It's been quite a while since I've lurked around here since I finished up my 96 Bayliner restoration... Well, I got the itch again and have bought a 28' cabin cruiser with a Mercruiser 496 Mag HO paired to a Bravo 3. I'm starting to dig into the drive...
  6. AShipShow

    DIY Audio Alarm System

    Not sure if this is of any interest to people, but I "finished" (never really finished) a restoration on my Bayliner last year and was wrapping up some odds and ends this spring/summer, one of which was the fact that my mercruiser alarm was not working. I pulled the buzzer and tested it on my...
  7. AShipShow

    Fluid Changes for Winterizing, Do I Need to?

    I think I already know the answer to this question, but... Life/weather got in the way this boating season and I only put about 5 or 6 hours on the engine... Now we are getting close to winterizing time and I typically will do an oil/filter change, drive oil change before putting her to bed for...
  8. AShipShow

    Alpha 1 Gen 2 Weak Link

    For the experts that lurk here... Does anyone know what the weak link is in these drives? I've heard they are typically okay to use up to 300hp and 5000rpm, but when you exceed that, what usually fails? I imagine its not always the same, but was curious if its typically a specific gear set, the...
  9. AShipShow

    Shift shaft bushings

    Is the bottom bushing on the upper shift shaft (shift shaft in the gimbal housing) supposed to fit loosely on the shaft?? I've noticed mine kinda wobbles around in the bottom bushing, but I recall seeing somewhere before that they had replaced theirs and it was still wobbly like it supposed to...
  10. AShipShow

    Mercruiser 5.7 shuts off when idling when warm

    I have a 96 bayliner with a merc 5.7, 2bbl mercarb, and alpha 1 gen 2. It seems to start up and run great, but I've noticed the last few times out, that after cruising around for a while, when I stop and idle, the boat has a tendency to idle for like 20 or 30 seconds, and then will just die...
  11. AShipShow

    Merc 5.7 stalls after cruising

    Hi all, I have recently just splashed my 3 year long restoration of a 96 Bayliner with a 5.7L Merc with a 2bbl Mercarb... (Engine s/n: 0F769374)... I noticed after a couple weekends ago that after cruising around for more than a few minutes, sometimes when I would come back down to idle to go...
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    Bad ignition module - 5.7 Thunderbolt V

    Hey all, I'm finishing up a 3yr restoration of my 96 bayliner... I started up the engine on muffs a couple weeks ago to check my throttle/carb settings and everything was working great. Just the other day, I went to start it up again to check a few more things and it would not start for...
  13. AShipShow

    Lateral engine alignment

    Hello all, I'm trying to align my 1996 mercruiser 5.7L with alpha 1 gen 2 after a full restoration. Everything with the transom was in spec after the rebuild... i seem to be getting heavier spline marks on the starboard side of the alignment tool... my first instinct was to rotate the engine...
  14. AShipShow

    Alpha 1 Gen 2 Shift Shaft Seals and Bushings - Should I Replace?

    Hi all, I'm finishing up a full restoration on my 96 bayliner and about to get the drive bolted up once I finish the engine alignment. I did an entire bellows job, shift cable, u joints, gimbal bearing, output shaft seal (the one behind the gimbal bearing)... I've also pressure tested the...
  15. AShipShow

    Mercruiser MCM 5.7L Alpha vs MCM 5.7L Bravo

    Thinking this is probably a simple answer, but what is the difference between these two motors that gives the difference in horsepower? (My assumption is the Bravo motor has the vortec heads and 4bbl carb, but just my guess). Otherwise, they to appear to have the same motor specs.
  16. AShipShow

    Bell Housing Synthane Washer Thickness

    Does anyone know what the thickness of the synthane washer are supposed to be when new? I just reinstalled my bell housing after doing my bellows job and found I have some side to side play on the hinge pins. The synthane washers are silver colered so I'm wondering if they are worn down and full...
  17. AShipShow

    Rebuilding A1G2 Trim Cylinders

    Just thought I would post this for anyone who might find this info useful. I've done it a couple times now and its a pretty easy job, but might seem intimidating the first time. Enjoy!
  18. AShipShow

    Opinions on manifolds and risers

    I think I already know the answer but what are the experts thoughts on the condition of these? The risers are pretty rough at the elbows but the manifolds actually don't look horrible to me but I assume they are the same age.
  19. AShipShow

    I think someone spilled this all over my boat!

    I just found a whole bunch of these cans littered all over my rotten boat... The lids were popped and the cans were empty!
  20. AShipShow

    Changing U-joints

    Howdy... I don't know if anyone will find this useful, but I noticed there were no good videos on youtube on how to change mercruiser u-joints. They aren't super complicated to change, but there are definitely a few tricks to the job. So, I decided to make a video of how to change them and...
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