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  1. Scott06

    Need a new block!!! 1990 fourwinns 4.3

    This should run through what years are interchangeable. you may want to consider getting a newer vortec long block either as a reman complete base engine or from a truck at a wrecking yard https://forums.iboats.com/threads/complete-history-of-the-4-3-liter-with-casting-numbers.693935/
  2. Scott06

    4.3l MerCruiser sluggish performance

    check the fuel filter contents for any thing but clean gas . Verify fuel pressure what do your spark plugs look like ? My guess would be rebuild carb, ensure ignition components are good, set timing
  3. Scott06

    Exhaust Bellows

    https://www.perfprotech.com/blog/articles/marine-exhaust-riser-height shows a diagram remember the exhaust goes up then does a series of 90s above the water line
  4. Scott06

    Exhaust Bellows

    The height of the exhaust riser and elbows above the water line. Typically the boat manufacturer will install an engine such that there is 14-15” from water line to top of the exhaust elbows . This height difference keeps water from backflowing into engine... but it can happen in certain situations
  5. Scott06

    1985 Chris craft inboard no spark

    Check for 12 v at positive side of coil while cranking Look at the kill switch disconnect shift interrupt switch verify that it isn't killing the ignition
  6. Scott06

    Need instructions how to remove merc 2000 3.0 L Engine from Boat

    Loosen the Bolts first to make sure you dont break one in the rear transom mounts or have a rotten front stringer where those lags go in. if yiu are trying to go in and out in one day you want to be ahead of any issues
  7. Scott06

    Trim hose to pump

    My thoughts as well or find a hydraulic or forklift repair shop can probably set you up with the right fittings or put new fittings on your hoses.
  8. Scott06

    Possibly Purchasing 70s Mercruiser 140... Overheated

    Very true, even if the engine/drive was newer and the interior was redone, its a 40 year old boat
  9. Scott06

    Possibly Purchasing 70s Mercruiser 140... Overheated

    Would agree with other comments that a 140 merc is a reliable engine parts available and cheap, also agree a 29 ft pontoon and a 140 you aren't going anywhere fast... it will be underpowered. Doesnt mean it cant provide fun I just think you wont be skiing behind it. Bigger issue is a water pump...
  10. Scott06

    Cant move shift forward or back

    Do you have the engine running? A bravo wont shift if the engine is off
  11. Scott06

    1989 vs 2008 4.3 differences

    Main difference would be later engine will have vortec heads roller cam and balance shaft And serpentine belt system. 2008 will make 190/220 hp (2 bbl/4bbl) vs 175/205 for the older one. balancer and flywheel will not swap. Starter alternator and ps pump may swap but you need to look at them...
  12. Scott06

    Marvel Mystery oil in a 2004 5.0 engine

    When it sputters and dies - take the coil wire off the distributor , ground it , and see if you get spark. Also the crab style MPI distributor caps are known throuble spots have you replaced yours. Have you measured the fuel pressure especially when it dies?
  13. Scott06

    Marvel Mystery oil in a 2004 5.0 engine

    Ok what did the old plugs look like? What rpm is it when it dies?
  14. Scott06

    NEED HELP QUICK PLS: Replacement Engine choices for 350 MPI

    If you are knowledgeable and talented enough to assemble your own engine ( seems like you may be from your comments) Scott can walk you though the right choices. If you arent knowledgeable or dont consider a project fun, buy the complete base engine. either route will work just one is more...
  15. Scott06

    Fouled Spark Plugs

    Stinky exhaust on start implies overly rich, make sure choke fully and consistently opens
  16. Scott06

    Marvel Mystery oil in a 2004 5.0 engine

    Ok when it stalls and will not restart have someone pump the throttle forward while you look down the bores of the carb if yiu see two solid streams of gas you likely have fuel in the carb. check for spark take the coil wire off the distributor and ground it see if you get a nice blue spark that...
  17. Scott06

    Fouled Spark Plugs

    Carb issue choke sticking closed or too much fuel pressure
  18. Scott06

    QJet to Edelbrock 1409

    Just below where the flame arrestor goes on the carb on the back left side there is a 1/4” nipple that sticks out fir the fuel pump diaphragm rupture overflow tube. Its at about 10 oclock if you look down at the top of the carb
  19. Scott06

    Need advise on bringing a 92 beretta succsess 200 back to life.

    Cant quite follow Whats going on with the choke, but i ran with out one for many years just fine by forcing mine open. Just needed a couple of throttle pumps and fast idle on colder mornings
  20. Scott06

    Mercruiser 3.0 Rebuild or not

    You may have to change the oil 3 times or so to get any milk cleaned out. Buy the cheapest oil you can put only 3 qts in, run it at the dock or on the muffs, keep changing the oil and filter until it stays clean.
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