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  1. ESGWheel

    Compression test

    As the others indicated, you should be good to go and if you desire to investigate more, that can be done. However, I am concerned about your symptoms to get up on plane. A V-8 5.0 with low compression (but not that low) on only one cylinder I would not expect to significantly degrade the...
  2. ESGWheel

    2005 Mercruiser MPI 5.0L misfiring(?) when in gear, idles fine

    Based on the original symptoms after just putting on a new cap and rotor my thoughts were there could be an issue with distributor wiring arrangement. After your pictures of which wires went were, I felt sure there was some ‘crossed wires’ hence the suggestion to validate. Note: by “crossing” I...
  3. ESGWheel

    2005 Mercruiser MPI 5.0L misfiring(?) when in gear, idles fine

    Post = put he photo on this website like u did the plugs... thx
  4. ESGWheel

    2005 Mercruiser MPI 5.0L misfiring(?) when in gear, idles fine

    Searay I have been offline for a while so just reading thru your success (congrats!) and next issues. A couple of things if you do not mind. While glad simple as cap and rotor, which we were all thinking, I am curious about the suspicion that a couple of the plug wires were ‘crossed’ and on the...
  5. ESGWheel

    2005 Mercruiser MPI 5.0L misfiring(?) when in gear, idles fine

    i forgot to mention that these types of dizzy caps usually have the cylinder no. stamped on it for each wire...
  6. ESGWheel

    2005 Mercruiser MPI 5.0L misfiring(?) when in gear, idles fine

    These sentences appear to be conflicting. Recall you need the snap, snap, snap rapid fire off the coil, less so off the spark plug wire. Is sentence no. 2 for the plug wire and not the coil?
  7. ESGWheel

    2005 Mercruiser MPI 5.0L misfiring(?) when in gear, idles fine

    I have not used that particular cap and rotor but its on my list to do so (I too have a 5.0 MPI but VP, same engine base). I see no issues with it and it was recommend. Recall you are our ears, eyes and hands. If you are 100% confident have voltage at both key positions, I will avoid the Click...
  8. ESGWheel

    2005 Mercruiser MPI 5.0L misfiring(?) when in gear, idles fine

    I am not positive on your engine, but the coil may get power in two different ways: One while the starter is engaged (key in the start position) Two when the engine is running (key in the run position) Need to find a wiring diagram for your engine, please search around on the forum at the Don...
  9. ESGWheel

    2005 Mercruiser MPI 5.0L misfiring(?) when in gear, idles fine

    After some good sleep, well not really > I was bothered by not picking up on your unique wiring numbering, so perhaps a little of that anxiety was creeping into me. First off do not need to replace the dizzy unless it is mechanically compromised. When you try to twist the rotor is ok it twists...
  10. ESGWheel

    2005 Mercruiser MPI 5.0L misfiring(?) when in gear, idles fine

    Oh, the great news is the compression numbers! You have a solid engine but I am concerned about the black plugs that indicate its running really rich. With a sound engine, all else is easy, relatively speaking. So you will get this solved. Perhaps that is a pep talk I need post putting foot...
  11. ESGWheel

    2005 Mercruiser MPI 5.0L misfiring(?) when in gear, idles fine

    No you are correct. I missed that this was your unique wiring system. Yes, the front of the boat is front of vehicle. This just goes to show you that when I post past my bedtime, i miss stuff. I will think on this more... sorry...
  12. ESGWheel

    2005 Mercruiser MPI 5.0L misfiring(?) when in gear, idles fine

    SeaRay, You’re welcome and I tend to be verbose as well, so we share that habit but it just saved you. Also, I sense that anxiety creeping back in :) There is NO reason to get another distributor. Your wiring to the cap is incorrect. I used your pic and put in blue text the correct plug...
  13. ESGWheel

    2005 Mercruiser MPI 5.0L misfiring(?) when in gear, idles fine

    Searay, please pardon my jumping in late on this. First off, I really appreciated reading your complete and descriptive postings. Believe it or not but a lot of folks will say: “Motor will not run, please help.” What you understand is that you are the eyes, ears and hands for those trying to...
  14. ESGWheel

    2004 5.7 GXI Overheat - Pump? Impeller?

    OK, now time to get to work :-) Do all that backflushing and checks as per above. Pulling off the hoses will be much easier with a tool set like this link. If you do not have one, trust me, get it. Also while pulling hoses give them a squeeze in the middle. Does it feel like you are crumpling a...
  15. ESGWheel

    2004 5.7 GXI Overheat - Pump? Impeller?

    Correct, on muffs, do not run it up, perhaps 1500 max but only for 10 seconds or so. Also, you may be able to run it on a hose without muffs connection. Read the attached. While you cannot replicate running it on the lake you can still do your investigation per above. Also please provide what...
  16. ESGWheel

    2004 5.7 GXI Overheat - Pump? Impeller?

    Let’s see if we can get the conversation started and get you back on the water with confidence. First off, a small drip fm the Raw Water Pump (RWP) would not impact the temps. And putting in a 150 t-stat is not addressing the root cause. A little more info on the boat would be helpful...
  17. ESGWheel

    5.0 GXi fuel problem

    You’re welcome. But the key to getting this solved is to answer the questions fm Scott and All Dodge. Do not be shy about asking questions, it the only way folks can help but in return you need to answer theirs. Troubleshooting is a logical step by step approach and without data / info, the next...
  18. ESGWheel

    5.0 GXi fuel problem

    Not technically a fuel cell but it is an assembly of a low and high pressure pump, hence referred to as a cell sometimes. Yes, these pumps came with internal paint that would flake off over time and cause havoc. This thread (link) is a collection of good info on this and what to do about it...
  19. ESGWheel

    Tensioner Replacement

    There may be a pin behind it to keep it fm rotating on that single bolt so be cognizant when reinstalling to get it all lined up correctly
  20. ESGWheel

    Volvo/OMC Raw Water Pump Repair/Replacement

    Unsure if you will get a consensus. My recommendation due to the age is get a new pump. While a seal kit may do the trick the 30-year pump may be worn in its shaft, chamber, etc, such that even with a new seal kit it will still leak. This post by @Scott Danforth (link) may lead you to an OEM...
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