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  1. P

    Mercruiser 3.0 Idle adjustment

    Is there a special tool to read rpm. My auto tach reads between 680 and 720 and 800 on muffs. When doing cars in the old days it seemed to be a stady number. Also should the clamp be on the #1 plug wire?
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    3.0 2bbl carb adjustment after rebuild

    2006 3.0 mercruiser with alpha one 2bbl mercruiser carb
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    3.0 2bbl carb adjustment after rebuild

    Yes my question is the white lead for the test rpm. Do I use my probes and put the red in there and the black to ground. I have the clamp on for the spark plug wire but it fluctuates. Between 800 and 720 I am wondering if I use the white wire with the connecter will it be more accurate and...
  4. P

    3.0 2bbl carb adjustment after rebuild

    Is there a special adapter to use the test lead the white lead that's on the motor for RPM
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    3.0 2bbl carb adjustment after rebuild

    Got it stady at approx 750 to 775 on dash tach. Moved mixture screw 1/4 turn up got rougher. Then backed off 2/4 was rough there set 1/4 higher seems best. I guess I am looking for a perfect setting. Smooth but it seems like it will vibrate a little at any setting. What do you think always did...
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    3.0 2bbl carb adjustment after rebuild

    The dash tach stays steady but 900
  7. P

    3.0 2bbl carb adjustment after rebuild

    Clamp on tach on plug wire
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    3.0 2bbl carb adjustment after rebuild

    Thanks. I checked cable for bottom out on carb. Let it warm up reduced rpm a little started to run rough. Increased rich counterclockwise to 2 turns out seem to be better. Rpm now fluctuates between 720 and 800. On spark plug wire. How am I doing?
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    3.0 2bbl carb adjustment after rebuild

    I rebuilt my carburetor and I put it in and it fired up just fine on one and a 1/2 turns.The RPm's are at a 1080 right now and I know I have bring them down with muffs to about 7:40 or 8:40. Then in the waTer idling in gear to 650. My question is should I adjust the mixture first and does that...
  10. P

    3.0 mercruiser i/o

    Thanks for that update someone told me that fuel injection didn't have the same issue cause it was an electric pump Sounds like you have really good advice there thank you
  11. P

    3.0 mercruiser i/o

    Fuel injection disent have the same issue as th 2bbl mercarb with accelerater pump
  12. P

    3.0 mercruiser i/o

    BZ ZZZ
  13. P

    3.0 mercruiser i/o

    That's why I wanted to install a primer bulb. Will that solve?
  14. P

    3.0 mercruiser i/o

    That's what I thought thanks
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    3.0 mercruiser i/o

    Near the tank. My question do I need a bulb for start up as I run it out of gas when not being used for a while so varnish dosent build up.
  16. P

    3.0 mercruiser i/o

    I have installed a shut off valve on the gas line to stop carb clogging when not used for a while. Carb is rebuilt. My question is should I install a bulb or is it fine to just start up. Don't want to damage fuel pump. Any advice is welcome.
  17. P

    Mixture adjustment screw non tamper cover

    You bet thanks
  18. P

    Mixture adjustment screw non tamper cover

    Thanks. The sad part I had it rebuilt 5 months ago and guess what not totally done. Should have been cleaned and replaced . Had some after run last year shop told me to set screw counter clockwise 1/4 turn but obviously that would never happen at the marina with this cap on. The initial setting...
  19. P

    1998 mercury 150 idle mixture screw adjustment

    I have this cover over the screw. Can't pull off. Do I cut down the side. Don't know what in there for space
  20. P

    Mixture adjustment screw non tamper cover

    So that tool removes the cap or adjusts needle afterwards. Others say cut it off
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