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  1. Rick Stephens

    ANOTHER WATER IN OIL QUESTION

    The valve by itself is not likely to get water into the oil quickly. Most likely a crack in the block or head.
  2. Rick Stephens

    1992 3.0L I hear air leak in #4 cylinder

    Need to cap off the water line going into the manifold. Then you are just pressure testing the block. You cannot pressure test the manifold as the water jacket is open to the exhaust. Valves aren't the problem. Water jacket in the motor is the problem. Could be cracked block, could be cracked...
  3. Rick Stephens

    5.7 Mercuriser Cracked Block

    Not that your thoughts are wrong, but a coupler with a properly aligned motor will last the life of the boat. I'd find it hard to put $300 in a part I can swap out in an afternoon. I completely agree with the crate engine path unless you are doing most of the work yourself. Stick it in and go...
  4. Rick Stephens

    Mercruiser shift interrupter

    Hmm, it's an on off switch. Would not have occurred to me to check resistance, only continuity.
  5. Rick Stephens

    Boat stalled, later found oil in Bilge... help!

    I would take it as separate investigations. First, where's the leak? Get down and look closely. Use your camera on your phone to look at places you can't see. Next, why no fire? Need two things, fuel and spark. Check both.
  6. Rick Stephens

    Mercruiser 5.7 anti-siphon valve

    X marks the spot...
  7. Rick Stephens

    2 Black sparkplugs

    Me either. Would love to see pics of this fabulous carb that adjustment of made all better.
  8. Rick Stephens

    4.3l engine questions

    I'm not sure horsepower is a good standard to aim for on performance. Boats really depend more on how much torque, and that does change upward with more breathing. How much theoretical horsepower we are getting is less apparent in performance. You may be able to sell off enough of the 3.0L...
  9. Rick Stephens

    4.3l engine questions

    Correct.
  10. Rick Stephens

    Fuel pump issues

    Most typical installation put the oil pressure switch for the pump at the port side of the distributor just behind the intake mani.
  11. Rick Stephens

    4.3l engine questions

    Turning the balance shaft takes 15 horsepower right off the top. Having pre-balance shaft is a boost right there. Best part of a V6 compared to the 3 liter is how quiet it is in comparison.
  12. Rick Stephens

    2 Black sparkplugs

    I've seen cheap valve seals ride up after 2 minutes.
  13. Rick Stephens

    2 Black sparkplugs

    Might just be bad valve seals if the compression is good.
  14. Rick Stephens

    Found a crack

    Ol Grump is useful now and then :D
  15. Rick Stephens

    Mercruiser 4.3L 190 HP Carb/Manifold Intake Upgrade

    Just the Airtex pump for me.
  16. Rick Stephens

    High oil pressure smell of gas in oil

    Electric fuel pumps with carbureted motors in boats do not run when the key is turned on. They get power from 2 sources: 1) When the starter is cranking, there is a wire coming off the starter that power the pump. This is the primer circuit. 2) Once you have oil pressure the oil pressure...
  17. Rick Stephens

    High oil pressure smell of gas in oil

    Fuel pump is tested with a pressure/vacuum gauge placed inline. There are fittings made to tee solid fuel lines. Carbs need 4-7 PSI. Set your timing correctly. Use proper procedure and a timing light. Don't ever just wriggle it around looking for a sweet spot. That's a great way to burn holes...
  18. Rick Stephens

    ANOTHER WATER IN OIL QUESTION

    Running lean and probably too much timing advance. Don't run it until you fix that issue.
  19. Rick Stephens

    Upper Housing Cap Paint Question

    I'd paint it. There is no gasket, just an o-ring up there.
  20. Rick Stephens

    Mercruiser 3.0: Dead cylinder? very sluggish!

    I'd consider pulling the valve cover off and making sure rockers are moving same on #1 as others.
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