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  1. Scott06

    Engine Replacement Compatibility

    a 4.3 to V8 is pretty easy swap - one the exhaust manifolds are different and down turn elbows after the riser/elbow on top of the exhaust. Both 4.3 and V8 share the same wye pipe so pretty easy drop in. I kept my wiring harness from the 4.3 just swapped ignition modules as the 4.3 doesn't get...
  2. Scott06

    Engine Replacement Compatibility

    Biggest things to consider are space in engine bay as that would be a lot of work to move rear seats make a new cowling etc . Anything can be modified but then your working on the boat not using it. So if you are purchasing a boat make sure it can fit your long term needs somewhat easily. In...
  3. Scott06

    Head Compatibility

    Agreed done that in backyard hone the bore re- ring plastigauage bearing rebuild … had s loads of blowbuy and never idled right
  4. Scott06

    Engine wont shut off with key

    Ok so you were back feeding 12 from alternator to coil then ? At least its fixed you’ve been through a lot getting this going
  5. Scott06

    Engine Replacement Compatibility

    Some one mark the date down, this is the first time Scott didn’t recommend a stroker …
  6. Scott06

    Mercruiser 3.0 diagnosis / serial number decode

    Oil leak doesnt seem so bad id just take oil out with you to keep topping up and put a rag or paper towl on there to soak it up and wait on the gasket. did you try snugging up the valve cover a little bit ? Might just be loose and gasket dried out
  7. Scott06

    Need prop help with new boat

    The distributor cap on the mpi looks like a crab its flat and is a known failure point, but usually causes a misfire, bottom line known weakpoint that is cheap and yes a lot less time than 8 yrs. @QBhoy has some experience on the symptoms. on the. 4 blade yes i have found especially with tail...
  8. Scott06

    Marks under valve cover

    What made you take off the valve cover? Engine runs well otherwise?
  9. Scott06

    Need prop help with new boat

    Sea Rays tend to be heavy. I wouldn't expect a 22 ft with a 5.0 to be a barn burner. I have a sea ray 200 sport that has a 5.0 carb but upgraded with a 4 bbl edelbrock carb and intake (advertised as 260 hp by Michigan Motorz). My top speed completely trimed out half tank if gas my best is 48 on...
  10. Scott06

    seriously need some experts help on this one, no water exits manifolds

    Yeah what he said.. I assumed it would be in warm up mode all the time. Which is the fuel injected way of having the choke stuck closed. Concern would be fouling plugs, I don't think it can mess with cats and O2 sensors if it has them, might not burn off mositure in oil. Really was just a...
  11. Scott06

    Mercruiser Alpha 1 Gen 2

    I believe that's a gen one drive as the shift hook stays in the gen two lower when you separate the halves If I recall correctly Turn the shift shaft in the lower clockwise this should lock in fwd when you rotate the prop counter clock wise to verify . Once the lower is locked in fwd. The...
  12. Scott06

    Engine Replacement Compatibility

    That's why I made the comment about hull may not be designed for it. If he already has a 4.3 not sure what he was thinking about swapping in.
  13. Scott06

    Engine Replacement Compatibility

    I assume you are looking to hop it up a little ?There's a couple ways you can go with this. The alfa drive is capable of 300 hp and often times guys run 383's in front of them with decent life. You have a very good base engine being vortec -a simple carb, intake, and maybe cam up grade would...
  14. Scott06

    Coil ground

    No grounding of coil body required mount it where and how ever you like
  15. Scott06

    Engine wont shut off with key

    Then the hot side (+12v) of the solenoid is different between old and new solenoid
  16. Scott06

    1976 Mercruiser 165 Engine Tick & Low Oil Pressure

    Run a heavier oil and enjoy it dont rev it beyond 4200-4400 you will be fine
  17. Scott06

    new 5.7 1987-1996?

    I run this on my 5.0 vortec https://www.michiganmotorz.com/5-7l-4-bbl-vortec-cast-iron-intake-manifold-1996-current Came with the partial engine I got from them- has a very nice mid range punch works very well idle to 5k rpm
  18. Scott06

    1976 Mercruiser 165 Engine Tick & Low Oil Pressure

    True it is no longer the 3k ppm it used to be, but Its still about 1200 ppm which is enough for flat tappet cams. It is generally mentioned in a lot of threads as a cheaper alternative to more expensive classic car oriented oils.
  19. Scott06

    Mercruiser 3.0 diagnosis / serial number decode

    if wire is chaffed where it goes through distributor this will happen
  20. Scott06

    Mercruiser 3.0 diagnosis / serial number decode

    Then you have an issue in your cap and rotor. If you place the cap end of the high voltage wire (coil to cap wire) 3/8" inch of an engine ground crank it and have spark , but don't have spark at the plugs see if cap and rotor are still making good contact. Other thing is to disconnect the...
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