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  1. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    Hello ESGWheel, I appreciate you and others hanging in there while I try to sort this out. 1. "Like Ringing a Dinner Bell" Sorry, its a slang term for when a crowd gathers. Seems like anytime I have trouble at the dock, I get a lot of unwanted attention, and irrelevant advice. 2. Adding Marvel...
  2. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    Ran the tests this afternoon: 1. Garage smoked like a KISS concert in 1978 due to 1 oz of Marvel Mystery Oil per cylinder for 24 hours +. 2. Spark gap test tool showed good blue spark at 6.35mm (1/4") on all 4 cylinders,. Once in a while the spark was yellow (does that mean that the coil is on...
  3. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    Just to point out to all and Thanks - I am getting on the water, its just not 100% where it should be. Maybe somewhere between 75%-85% overall right now. In NE Ohio now, we only have about 3 weeks left before most all go into storage. Cold starts at the dock/launch are embarrassing now. It's...
  4. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    I stated in OP that I did not test the fuel pressure.
  5. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    That is very close to what I ran in my Ultrasonic cleaner for this carburetor. I used the Zep equivalent - Concentrated All Purpose green liquid de-greaser. Thanks,.
  6. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    Guys, I will repeat that test with removing each spark plug wire while running checking the RPM's, and report back here. It was over a month ago , and a few other changes took place since that was tested.
  7. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    Uggh.. that is above my pay grade. Isn't there a better way to check for a stuck valve? Would not the compression measurements be off if there was a valve that was sticking? All 4 psi measurements were very close. I will try a spoonful of Marvel Mystery Oil in each cylinder before I tear the...
  8. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    Yes, agreed something was off, and still is. I will go back to 2 turns out, then let it warm back up and check it again. I used an ultrasonic cleaner on carburetor venturi and as many smaller pieces that would fit in my 7" cleaner. I did not want to soak the whole carburetor body in a can of...
  9. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    Oh, Yes, now with the words "Adjustable, and 'Jumping" added, I was able to locate one: https://www.walmart.com/ip/Convenient-Ignition-Coil-Diagnostic-Test-Tool-with-Adjustable-Gap-Distance/14582409093. I will get that..so for this engine, I am looking for a blue spark that just has to jump at...
  10. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    Hi, Yes, the total advance met what the service manual was calling for, in that range. I will go back to the air/fuel mixture screw # of turns again. I also initially thought that 4-5 turns out was turned too far out, but I made that adjustment in the middle of the lake, as it was recommended to...
  11. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    Hello, The manual that I am using is very similar & same part #, but the full version of https://www.aservicemanualpdf.com/Samplepages/Mercury%20Mercruiser%20Marine%20Engines%20GM%204%20Cylinder%20181%20CID%203.0L.pdf
  12. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

  13. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    Would it be worthwhile to just replace the ignition coil at this point? It appears to be the original, though, it is definitely producing spark, but enough? I don't think that this distributor has points nor a condenser being EST-based. Thank you.
  14. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    Yes, I did this test back over a month ago and it passed. Service manual had me also disconnect the shift interrupt wires and join the engine harness wires together for this test, in addition. I made my own jumper wires out of OFC copper braided cable. The ignition timing was dead on 2 degrees...
  15. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    Hello, I bought the new cylinder compression test kit last week, and ran it on all 4 cylinders. Here are the results that I recorded: Cylinder #1: 175psi ; Cylinder #2: 175psi ; Cylinder #3: 175psi, and Cylinder #4: 180 psi. I noticed that one AC Delco (MR43LTS) spark plug had a very slight...
  16. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    I checked the hormones on the gears and they are within spec.🤣
  17. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    I know, I said I am sorry, in a way & yet no closer to solving my problem, Nobody is allowed to be near the prop when running of course. Compression Test kit arrives tomorrow. To find out that the compression is off at this point would be a real kick to the groin. Fingers Crossed and Thanks.
  18. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    Thanks and Noted, I do that infrequently, as little as possible. I keep my eye on the temp gauge as well when I did that.
  19. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

  20. GeorgioP07

    2012 3.0L TKS runs great with muffs, but slow on lake...

    The compression test and fuel pressure test were not done, but I can go down that route, as I will need to purchase the compression test kit. I did so many other small tests that I forgot to mention so far , - I forgot to mention that I bought a spark tester, the one that's clear and goes inline...
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