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  1. Scott06

    need to access your knowledge

    Yes but 1990 is a crossover year Where rear main seal changed to one piece seal and flywheel got larger To 14” . easiest play is if you get the entire merc140. some of the heads and manifolds are different as well, what exactly are you looking at swapping. If your engine was frozen i wouldnt...
  2. Scott06

    3.0 litre Mercruiser sterndrive oil issue

    the complete oil capacity of this engine is 4 qts with the filter. Would second other comments that it may be over full now.
  3. Scott06

    info on alpha one gen 1? water pump base..

    Whats your drive serial number
  4. Scott06

    I/O Characteristics

    agreed keep our boat in a shallow cove -26” deep at lift, every time i go out i have to have it trimmed almost to the point of the prop not having enough water to bite… in 50 years three boats between my grandfather, parents, and i changed one set of ujoints, keep it below 1 k and youre fine
  5. Scott06

    3.0 litre Mercruiser sterndrive oil issue

    Yeah take some pics. Agree with guys on corroded or poorly installed filter but that is on front left of a 3.0…remote filter would be in same spot. power steering hoses go back there but wouldn’t affect oil pressure on engine. Hoepfully u shut it down soon enough to not damage engine . I assume...
  6. Scott06

    I/O Characteristics

    There is enough scale rust and crud in a used raw water cooled engine such that if you add a closed cooling system with a heat exchanger you will repeatedly plug the tubes in the heat exchanger and it won't cool. So basic rule of thumb is once a raw water cooled engine always a raw water cooled...
  7. Scott06

    New Engine Replacement - Engine Died and Hydro locked after 5 hrs!?

    water spray looks like something that would come off a depth finder transducer added to transom or maybe something off the swim platform added
  8. Scott06

    Mercruiser 4.3 keeps burning ignition coil

    Ok then likely you need to replace lower shift cable. I don't think the 11 volts running is right you are loosing voltage somewhere, would think at some point this may become an issue
  9. Scott06

    Happiest Day of Ownership !!!

    I think yes the AF is related to the type of alcohol in it. In my personal experience it is just fine for what you are doing. I use the cheap Walmart stuff for my jetski and boats for years no issues. My tow vehicle is outmatched as well, but like you it is short distance and just use your...
  10. Scott06

    Alpha Gen 2 Trim Bushings are outrageous!

    Not sure what you want hear on this. The OEM are like $82 for eight so the aftermarket is a better bargain. Yes it seems like a rip off for what it is, but if $58 bothers you, you may want to find a different hobby
  11. Scott06

    3.0 litre Mercruiser sterndrive oil issue

    Was it low or empty - if completely empty I would think the engine would sound like a coffee can with rocks in it. How much oil is in bilge ? You will have to get under or behind the engine and take some pics- depending where the oil is from it could be a few things - where dipstick goes in...
  12. Scott06

    Mercruiser 4.3 keeps burning ignition coil

    I would try the following when it happens- measure for 12v at Positive side of coil- you may have loose or corroded wiring if only getting 10.9 volts - check the cannon plug between engine and boat harness. somewhere you are loosing volts. Basically the ignition system gets power to the dash...
  13. Scott06

    mercruiser 7.4 mpi can't figure out the ratio

    I think normally the spark plugs look really clean as the water cleans the carbon off it. One common way water can get in and hang up valves is via the exhaust manifolds and risers. need to find reason for low compression.
  14. Scott06

    Duo Prop Removal

    Is one of these a left hand thread?
  15. Scott06

    Repair Y Pipe Possible?

    I have found the same bottom line Ebay wants folks to get what they pay for and use the platform. 99% of what i have bought off ebay is as advertised
  16. Scott06

    mercruiser 7.4 mpi can't figure out the ratio

    Agreed original numbers looked low. Hopefully just a valve job to fix
  17. Scott06

    Newbie looking for advice

    Read OPs first post
  18. Scott06

    Removal of bottom paint?

    Ok thats what i was thinking 2-4 mph loss. Mine is rough as hell. Its a 21 ft 3400 lb bowrider. I bought it with a cracked 4.3 low hours except for engine was in perfect shape. I put in a 5.0 partial engine from Michigan Motorz, essentially a new base engine with Edelbrock 1409 (in theory 260...
  19. Scott06

    Newbie looking for advice

    No i think it was lakes…i was thinking the same
  20. Scott06

    mercruiser 7.4 mpi can't figure out the ratio

    90 psi if accurate is a dead cylinder so yes would affect performance significantly. Would do a leakdown to see where you are loosing compression. Might be a head gasket or valve related vs needing bottom end rebuild. Have you had issues with exhaust leaking water into chambers ?
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