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  1. Scott06

    Trying to ID V6 4.3 motor

    its a chevy 4.3 ? @Scott Danforth did a bunch of work on the casting numbers for them FWIW there is no marine block the block is the same as the 4.3 used in trucks as well. I think the casting will be back on the flywheel cover flange (aka bellhousing) that will be a number like 090 or 090M...
  2. Scott06

    How do you design correct Bravo III ratio?

    Is the drive gone too? If not run it behind what ever engine you can afford. have also seen the 6.2 as a replacement for the 7.4 you will shed some weight with the small block that makes as much power as the 7.4 . are you doing this work or is the dealer? If the dealer is doing it they have to...
  3. Scott06

    How do you design correct Bravo III ratio?

    @msd58 is that the same boat you have ?
  4. Scott06

    Replacement Exhaust Manifolds for Merc 496

    then it was fresh water use, if they pass acetone I would use them
  5. Scott06

    1988 mercruiser 260 9 pin engine harness to 10 pin harness

    you can swap everything but as AD mentioned you probably dont have to as mentioned yes its ten pin but one is usually not used. what does the matching male plug have on it?
  6. Scott06

    Replacement Exhaust Manifolds for Merc 496

    That may be essentially fresh that far up the Potomac. If thats the case they may be fine to use. What I have seen in manifolds in fresh they get a brown layer of dust on them but no chunks flakes etc. You can test by filling with acetone which will wick into cracks or pin holes. Again hard to...
  7. Scott06

    '95-ish Glastron SSV195 carbureted mercruiser 4.3 starter solonoid wiring color codes

    I would take a look at cap and rotor, they tend to get some green corrosion on the contacts. might look at the spark plugs if corroded from sitting
  8. Scott06

    2004 Searay 4.3 Lt w stall

    no its not rocket surgery... just make sure you get all the passages clean, if not you will be doing it again.
  9. Scott06

    Replacement Exhaust Manifolds for Merc 496

    given the age and use just replace them. My good friend who is in the Chesapeake middle to upper bay they are a wear item. When you remove the elbows there will be two passages you can look down in. There is a big diff between what you see in fresh only lake use and brackish/salt. if you look...
  10. Scott06

    Replacement Exhaust Manifolds for Merc 496

    Normally Barr is the only aftermarket one that gets OEM like quality marks. The dry joint is open at two points where it connects to the riser ? cant see in there? Was it a salt water boat? if it was definitely replace them, if it was fresh water use they will last the life of the boat...
  11. Scott06

    2004 Searay 4.3 Lt w stall

    so the boat sat?if so carb prob needs a rebuild and the igntion components and timing?
  12. Scott06

    2004 Searay 4.3 Lt w stall

    Do you know if this is 2 bbl carb version or fuel injected - serial number is great if you can provide it. I am guessing you have a fuel delivery issue or carb that needs cleaning or both. First as a baseline-I would do some basic checks on ignition timing and check condition of cap rotor and...
  13. Scott06

    Merc 496 Mag Compression and Leakdown Results

    Was the bilge full over the engine ? If you have corrosion on the pan I would replace it while out. I think what my buddy who is in salt water did was replace the pan prime and coat with rhino liner or some bed liner material. Get a new starter while its out. While the pan is off you can see...
  14. Scott06

    Merc 496 Mag Compression and Leakdown Results

    to quote Jackie Gleason- that's an attention getter ... I think you would be more lucky than right just bumping the starter. I suspect if the engine is out you have bigger issues than a little higher than ideal leak down, especially if the engine sat.
  15. Scott06

    Merc 496 Mag Compression and Leakdown Results

    I would not tear into it at all based on those numbers. Is it possible the 15 % cylinder was not at tdc when taken and valve was not quite closed? Would definitely run it then retest if it makes you feel better but I think you are fine with what you have
  16. Scott06

    1989 Flat tappet 5.7 convert to roller?

    Sounds similar to when I started my gto 389 years ago , I was 180 out on the distributor. Thought the same thing worried about the lube etc , was fine. rechcek you are on compression stroke tdc not exhaust Consensus on current issues with flat tapped cams is the ones that lobes get wiped are...
  17. Scott06

    Mercruiser alpha lifting point

    You can hang it from there, I usually lay mine on the floor under the trailer can’t get damaged if it’s already on the ground
  18. Scott06

    I have a leak.

    The wye pipe can corrode through, also if you loose a flapper they can lodge in the bottom of the wye and wear through. could be any of those things. Need to look with scope camera or pull the engine and put the boat in the water so you can get in and see what is going on
  19. Scott06

    Need advice choosing an engine.

    Unless money is no object or you want to improve performance I would do a compression and leakdown test on it before deciding to replace it. If you are doing the work and have the ability to lift it, its really not so much work that I would let the fact you need to pull it drive replacing it...
  20. Scott06

    Gen1 oem impeller kit (frustrated)

    its the orange thing just below the impeller in the pump kit shown above. I have usually found that going OEM for impellers and components is best
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