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  1. Scott06

    Stainless Prop Film

    I get the same thing on my merc props in fresh water as well. CLR or dollar store toilet bowl cleaner seems to work
  2. Scott06

    2005 Bayliner 175 Mercury 3.0 Mercruiser i/o - Stalling

    Sounds like you need a carb rebuild. Save the carb cleaner for when you get the carb apart as you need to clean the inside passages. Likely your idle mixture passages are clogged with debris. Would also take the fuel filter off and check it for water and debris. On most 3.0's this is in the...
  3. Scott06

    Merc prop selector

    Shifts fine, yes it is heavier than the avg prop. A lot of outboards use the same dog clutch as an alpha so not an uncommon situation.
  4. Scott06

    Mercruiser 4.3L lift points

    No picture were attached. Why don't you file the high spots down on the bar vs buying a new one.
  5. Scott06

    Mercruiser 4.3L lift points

    Yes if you can get the yoke in you should be ok. Your alignment tool may not be made correctly. I think there is a dimensioned drawing in the stickies
  6. Scott06

    Dieseling 3.0

    I used seafoam dribbled down the carb eventually stalling the engine, let it soak in 15 min , then run the engine and burn it off. This did help the dieseling. Merc also makes an aerosol called power tune to do similar
  7. Scott06

    Merc prop selector

    As others have mentioned I would try an Enertia or Revolution 4. You want to prop it like your current to hit the upper end of WOT. I have similar size Sea Ray 200 sport with a 5.0 with Edlebrock 4 bbl, so probably a few ponies shy of your 5.0 mpi. A lot of folks here dont like 4 blades but...
  8. Scott06

    Break in procedure for new '77 Merc 140hp

    If you have good water pressure and a good size hose you wont have any issue doing the cam break in on the trailer. I don't think you need to go quite as high as 3 k normally I have done 1-2 k. Make sure to use ZDDP additive or an oil that has it for break in. I use these style muffs no issue-...
  9. Scott06

    Break in procedure for new '77 Merc 140hp

    If you have good water pressure and a good size hose you wont have any issue doing the cam break in on the trailer. I don't think you need to go quite as high as 3 k normally I have done 1-2 k. Make sure to use ZDDP additive or an oil that has it for break in. I use these style muffs no issue-...
  10. Scott06

    Mercruiser 350 mpi horizon 2007 max rpm 2500 today

    Is t there a switch that sees f you are in gear vs neutral ? If so might be limiting rpm just thinking it’s not in gear
  11. Scott06

    Mercruiser Alpha 1 gen 1 Trailer Button on outboard

    There can be a stern mounted drive up switch mounted usually it’s on the side of the hull by where the swim platform is if it has a non factory swim platform it might be under it
  12. Scott06

    Tb IV intermittent spark ?$#???

    If u now consistently have 12v at coil go through the thunderbolt troubleshooting guide in stickies Get an oem merc sensor …
  13. Scott06

    Exhaust Bellows or Not

    You are fine with torn missing or destroyed exhaust bellows. Having seen how well the merc stuff holds up , it’s not worth the time you put into doing the work to deal with pos parts that don’t fit or don’t last
  14. Scott06

    Knocking sound - what is it? [video]

    I wouldn’t install that gasket with those ports. Would think someone swapped the head or manifold. Maybe merc tech support can offer a solution or just order the earlier style gasket and see how it matches up I believe the Barr kit is you can mix and match earlier and later manifolds and heads
  15. Scott06

    Exhaust Bellows or Not

    Are u using oem bellows ? I just changed my original ones last year 2004 boat. The exhuast had torn two or so years before but driveshaft bellows were just starting the chaffe against gimbal ring
  16. Scott06

    2005 350 Mag dropping fuel pressure under load

    Always the simple stuff . Great job finding it
  17. Scott06

    Gimbal Bearing Alignment/Installation Tool Question

    Don’t know the dimension u are looking for but I just used a 2 ft length of 3” pvc pipe to drive it in
  18. Scott06

    Knocking sound - what is it? [video]

    Two different styles of head ports and corresponding intakes were used on 3.0 s nit sure the transition year. would make sure you have match head and manifold and get correct gasket
  19. Scott06

    Tb IV intermittent spark ?$#???

    Yes missed that the power is dropping out, would not be the tach dropping 12 v . But it tach is reading wonky would leave it disconnected anyway
  20. Scott06

    5.7 EFI stalls when warm and shifting into gear

    I think what he was getting at - If it maxed out at 4400 rpm just means that this set up was over propped a little and would have been at some points lugging the engine which can lead to detonation and higher exhaust gas temps being under max load a lot due to over pitch. Would suggest going...
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