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  1. Kola16

    Yam F300 vs. Merc Verado 350 vs. 383 MPI

    Hmm maybe I am missing something. I would have better fuel economy, better cruising speed, and better top speed with an I/O, but the I/O is the cast iron egg beater? Can you explain this further? I am certainly not interested in putting something less than 300 HP on my boat. I love wakeboarding...
  2. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    Something weird with testing today. When I was measuring the timing today, sometimes the timing light would not light up on the number 1 plug. So I put the timing light on different plug wires for testing and the timing light flashed just fine. Put it back on plug 1 and it would be sporadic when...
  3. Kola16

    Yam F300 vs. Merc Verado 350 vs. 383 MPI

    Considering repowering my boat due to the constant troubles my engine has had. My boat is a 1979 Wellcraft Suncruiser 225, which is the boat in my avatar. The boat is heavy for 22.75 ft. at roughly 5000 lbs. with gear and without main engine or gas. It has a 22° deadrise at the transom without a...
  4. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    I did check the fuel pressure at WOT on the lake. I think it was 6.5 PSI or so, so that checked out. Held pressure well too with the new fuel pump. The old fuel pump did not hold the pressure for very long so good thing I replaced it. I will do the compression test and definitely check the Y...
  5. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    I tested the boat at the lake yesterday. Retarding the timing did seem to help the performance slightly, but definitely did not fix it, as expected. All cylinders had spark too. I am at a loss at this point. I will pull the carb apart again to see if any corrosion is back in there. I will also...
  6. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    Update, so I took apart the carb and blew out on the channels and "stuff" with an air compressor. Got it all clean and particulate free. Put the carb back together to go test it on the lake. Still a no go for the higher RPMs. I could barely plane even with putting the trim tabs down. So I...
  7. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    The corrosion and particulates did not come from the fuel tank they came from the carb. I know this because the same corrosion products were on the non-fuel parts of the carb as well. They stripped the nickel plating and corrosion resistant stuff off the carb after they rebuilt it. Thats why it...
  8. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    Thank you that is exactly what i was looking for! I was calling the jets the wrong thing. The jets are at the bottom of the bowl and that is what the fuel goes through which transfers the fuel out the nozzles. I was calling the nozzles the jets 🥴 I will try to blow out and clear the carb, and...
  9. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    I went to get a timing light and a spark gap jumping tester, and the local auto stores did not have a good timing light or a spark gap jumping tester at all. So I took the carb apart and I need some help on understanding how the Edelbrock 1409 carb works. Does the fuel at higher RPMs get...
  10. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    Well that did not fix "the" problem, but it did fix a problem down the road. Also my fuel pressure does not go down now when I hit the throttle and the pressure stays up when I turn the engine off, so that is good. I still am having the same problem not even being able to get to 4000...
  11. Kola16

    Mercruiser Distributor

    Yes it will. The distributor should fit all SBCs. Big blocks too I believe? I have a 350 and the distributor was originally from a 305.
  12. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    Well I think I found the problem. At least I found "a" problem. I was about to assemble the fuel pump and gave it a one-over one last time. Then I found this: That crack in the gasket is just barely on the side going to the carb; therefore, the side seeing the 6 PSI. Going to pick up a new...
  13. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    Big WOW looking at my engine tonight! The person who installed my engine in my boat or the engine builder (whatever one) did not install the bolt that is on the front of the block used to hold the pushrod to the fuel pump up during install of the fuel pump! That part of the block must not be...
  14. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    I agree. Not impressed at all. Last time I buy a rebuilt carb.
  15. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    -I will keep the fuel pressure gauge on there from now on. I'm going to order a more permanent one so I can just leave it in there. -I do not think it is debris in the fuel line because when i pulled the Q-jet apart I did not find a speck of anything and it was very clean. I also found little...
  16. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    I am not sold that it is the fuel pump though. It might be the newly rebuilt carb and here is why I think it is possible. One day I was at the lake when I had the Rochester carb and the boat was doing the same thing. It could idle, but it could not plane and sounded like it was missing at high...
  17. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    41421293F Looks ancient 😂
  18. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    I get that, but I am concerned that the pump is working intermittently. I have had this same problem for a looooong time. My boat will run fine for a long time then all of the sudden I can't get it to run at 3500 RPMs, just idle. I thought it was the old carburetor I had on there. So I took the...
  19. Kola16

    Oil Pressure Below Mercruiser Limits Per Manual

    I found your other thread. I would test it with a temporary gauge. You can get them for $20. https://forums.iboats.com/threads/1993-mercruiser-4-3l-v6-ran-out-of-oil.744386/#post-5673491
  20. Kola16

    Oil Pressure Below Mercruiser Limits Per Manual

    How old is the gauge? Not all oil pressure gauges are the same. Is the reading accurate is what I am getting at. You mentioned you ran it out of oil. What was the cause of that? Did you fix that problem? Are you still losing oil? What engine are you running?
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