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  1. Kola16

    2003 Suzuki DF140 Nothing Out of Telltale.

    Not my boat, but I am trying to help fix it. The serial number is 14001F-422077. 2003 Suzuki DF140 4-stroke. The engine is not peeing even with revving the engine and letting it warm up. It is not overheating the block, but we still need water out the telltale. We thought that the system could...
  2. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    Another good update! Just for future reference if you ever hear of high compression in a newly rebuilt engine. (High in this case being relative since my compression tester reads inaccurate but precise.) I put a lot of seafoam in the cylinder with high compression. Let it soak and retested...
  3. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    GOOD NEWS (kind of) UPDATE! The choke was rusted solid! The lever that the spring pushes was so corroded after the first time in saltwater, that I had to tap it good with a hammer to disassemble it to clean the corrosion out so it could move freely again. I didn't realize that an electric choke...
  4. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    I'm coming to think they were not the exact same symptoms with the old carb. The old carb wouldn't do it right out of the gate usually. It would take it a little bit. And the old carb was more sporadic, and the idle was more rough with the old carb. I have been looking at videos of adjusting...
  5. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    How much is the plate for the choke on the carb supposed to open? It seems like it should be wide open to me? I will upload a picture when I get home, but it was not vertical after it had been running for 15 minutes or so...
  6. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    I did another dry compression test after running some seafoam through the engine to try and de-carbon cylinder 8 and got: 1 - 170 PSI 2 - 155 PSI 3 - 168 PSI 4 - 167.5 PSI 5 - 150 PSI 6 - 170 PSI 7 - 167.5 PSI 8 - 195 PSI Obviously did not de-carbon it much if at all. I do agree that the numbers...
  7. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    I did not verify the ignition timing, but I have no reason to believe it is off since it was running great, and then all of the sudden not without touching a thing. I will verify tonight anyway. I would not disagree that I have gauge accuracy issues, but I believe the readings in relation to...
  8. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    Really? Even with 190 PSI as my high and 140 PSI as my low? That's a 30% difference and 50 PSI difference. I have an Edelbrock 1409 on there now. I am just going to buy a new carb just to be safe after I finally get the darned thing running. I will do a wet test on all of the cylinders tonight.
  9. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    Wow, it is a lot harder to get a mechanic to work on my boat than I thought! So I have to try to fix it on my own. I was doing some research and I found out that I needed to do the compression test a different way. So this time I took the compression test with all of the spark plugs out, the...
  10. Kola16

    Yam F300 vs. Merc Verado 350 vs. 383 MPI

    I would have sold this boat a long time ago if I could have. The darned thing has sentimental value. My dad bought it new off the lot with his dad. My dad and I did a full resto on it a 5 or so years ago, which included new stringers and a new transom, so it should be sturdy. My dad used to...
  11. Kola16

    Yam F300 vs. Merc Verado 350 vs. 383 MPI

    Ya I understand that. I am a mechanical engineer though so I would hope I would be able to figure it out😂
  12. Kola16

    Yam F300 vs. Merc Verado 350 vs. 383 MPI

    I'm not worried about the work or the cost. I like working on boats as a hobby and boating is what I spend my money on so just want to get the best option out there. I want to ditch the carb though. If an outboard is more reliable or the weight savings is that much more noticeable, I would...
  13. Kola16

    Yam F300 vs. Merc Verado 350 vs. 383 MPI

    Sorry, this is not right. I rented a 22' Hewescraft aluminum boat for a week with a newer F200. WAY lighter boat than mine with an offshore bracket and way less steep of a deadrise. The thing was a dog. Slower than crap. If I stuck that F200 on my boat, it would absolutely suck. My buddy has a...
  14. Kola16

    Yam F300 vs. Merc Verado 350 vs. 383 MPI

    I just realized I put the Verado 400 instead of the 350...Whoops...
  15. Kola16

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    I took the port side Y exhaust pipe off and inspected the shutters. They were right where they should be in good working condition. The leak was easy to find the cause of, the 3 allen screws had come loose so I tightened those back up when I reinstalled the pipe. I am taking the carb apart...
  16. 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...
  17. 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...
  18. 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...
  19. 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...
  20. 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...
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