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  1. Scott06

    2003 Mercruiser 4.3 TB-V No Spark

    And is the black wire off sensor on a clean ground
  2. Scott06

    Tachometer bouncing

    You will need to remove it and helicoil or put a timesert or similar in there
  3. Scott06

    Floor issue 21' boat

    That's what you tell the wife ...
  4. Scott06

    Floor issue 21' boat

    If you have been there and done that before go for it. The concern of most posters here, not knowing your experience level, is that you know what this entails. Hopefully it is not too bad. Will be interested to see how much rot is there
  5. Scott06

    Solas stainless 4 blades all the same?

    So by lowest level you mean tabs are down more to push bow down? The engine rpm will bounce like that on the limiter as it drops spark to cylinders until rpms come down. If engine temp climbs at that rpm you need to look at the cooling system, if impeller has not been replaced I would do so...
  6. Scott06

    Floor issue 21' boat

    Given the obvious rot would want the guy to drill into stringers and transom. The water that rotted the floor had to go down somewhere... Like rust on an old car what you see is likely the tip of the iceberg.
  7. Scott06

    Popped through the intake.

    this is one of the best spark plug reading tutorials I have found http://www.wallaceracing.com/plug-reading-lm.html
  8. Scott06

    Trouble starting a Mercruiser 4.3L I/O

    you must not be pressing the button in to rev it up in neutral. why dont you start a new thread vs tagging on a 14 yr old one . tell us what you are working on and what issue u are trying to solve
  9. Scott06

    Tb IV intermittent spark ?$#???

    Wait sorry i misread the tb trouble shooting, if you do not get spark striking the green white its says to try new coil then replace module in that order… do u have a spare coil to try ?
  10. Scott06

    Carb to MPI problem 2011 Merc 4.3

    it could be and given how many times you see strange misfire symptoms cured by this you need to rule it out
  11. Scott06

    Tb IV intermittent spark ?$#???

    If it is a good ground then that means the sensor is bad. Not surprising since it went scuba diving ... Would recommend getting an OEM sensor vs the aftermarkets ones. this is an OEM quicksilver from the quicksilver store on Amazon...
  12. Scott06

    Carb to MPI problem 2011 Merc 4.3

    @alldodge and @QBhoy may have some other ideas given its MPI
  13. Scott06

    Tb IV intermittent spark ?$#???

    Follow the service bulletin he posted I circled where you are at in it - by striking the white and green lead to ground you are simulating what the sensor in the distributor does to get the coil to fire. If it does fire at coil the sensor is bad if it does not fire follow to testing for bad...
  14. Scott06

    Carb to MPI problem 2011 Merc 4.3

    It is but lets do some diagnostic work first How about a little more description of the problem ? And what’s your serial number Have you checked your fuel filter contents for any thing but fresh clean gas?
  15. Scott06

    Carb to MPI problem 2011 Merc 4.3

    No MPI is very good. 220 hp on your engine vs the 190 hp carbed model. yes the cap is a common fail point for misfires. Certainly could be other things but if you dont know when it was changed would be a good thing to rule out.
  16. Scott06

    Carb to MPI problem 2011 Merc 4.3

    That is not a carburetor. You have an mpi engine. when was the last time cap and rotor were changed ? Common fail point on these engines is the crab cap.
  17. Scott06

    Carb to MPI problem 2011 Merc 4.3

    Definitely rebuild the one you have. The main part is to make sure you are getting the passages clean. I use a harbor freight ultrasonic cleaner works nice on the rebuilds i have done with it. Thats is whee most carb rebuilds fallshort , need to get passages clean. From your description either...
  18. Scott06

    Steering pin replacement

    Have you priced the oem part? Thats gouging. its not the same part. There are a couple price brackets you will see for these $29-39 , around $100 like this, and the oem which is like $300 Its your boat Your call.
  19. Scott06

    Steering pin replacement

    Would get the steering pin from nuwave marine. you consistently see good comments about this part...
  20. Scott06

    Carb to MPI problem 2011 Merc 4.3

    cliffs high performance and mikes carb parts are both excellent parts and tech resources. mikes has a you tube channel with how to vids https://cliffshighperformance.com/ https://www.carburetor-parts.com/
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