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  1. K

    1975 25 hp Evinrude 25502B

    Pulled that line and it did not make a big difference. The engine is still surging a bit. Any ideas with that? I thinking the carb is bad?
  2. K

    1975 25 hp Evinrude 25502B

    Lol yeah. The other 2 are 73 18 hp and a 72 20hp so no not exactly the same. I will pull that recirculation hose off and see if it improves 😉 read about this a few different times. Recirculating that gas helps environment but messes With performance. Should I run a j6c plug think that will help...
  3. K

    1975 25 hp Evinrude 25502B

    This is from the other day, a better video.
  4. K

    1975 25 hp Evinrude 25502B

    Both look like this. Got good spark.
  5. K

    1975 25 hp Evinrude 25502B

    I hooked up the timing light and had good pulse. But I will check spark for sure. I did replace a coil as it was split and not working. Tested the current ones and timed points In with the multimeter. But do you think weak spark at low rpm? Or bad coil when it heats up?
  6. K

    1975 25 hp Evinrude 25502B

    Here is a video, I'll post a better updated video tomorrow of the issue. Captured this before I changed a fuel line that was leaking air. It stopped surging after the new fuel line. At the end of the video I was feathering the throttle to keep it running and when it died I had it as far back as...
  7. K

    1975 25 hp Evinrude 25502B

    I did clean that and re plugged it. The needle I turned back out 1 1/2 turns and it ran good with that valve opened a little. But as soon as it closes it dies. So it is set to the leanest setting possible. Any more lean I get the lean sneeze. So needle is set in a good spot.
  8. K

    1975 25 hp Evinrude 25502B

    Hello got another project motor. 1 thing I have been stumped on. As the cam roller passes the fist dot on the throttle control the engine dies out. RPM's go down and it dies. At higher RPM's motor runs good. It should be able to go passed the first dot on that throttle control and continue to...
  9. K

    Upper Crankshaft bearing below seal damaged

    Ok, so remove powerhead and split it open. Replace bearing. Put it back together? Any spacial things gonna nred to be done?
  10. K

    Upper Crankshaft bearing below seal damaged

    So I have a motor that is in question. Removed the seal and I used the old school method of drill 2 holes and used 2 screws. Ive done it before without hitting the bearing case. Well this time the bearing case was hit... need some advise. Would it be ok to run it like this? What's involved in...
  11. K

    20 hp Mariner No spark

    Finally got a day with low wind. Took it out for a test run. Broke the dash pot and Idle wire last trip, but she still runs good and fast. We hit 24 mph at WOT on our night trip just recently.
  12. K

    1975 15 hp evinrude 15504C warms up then dies

    Oh and yes it had BH6S NGK in it and I went back to the same when replacing them.
  13. K

    1975 15 hp evinrude 15504C warms up then dies

    Awesome, love iboats for this reason, I appreciate the advise. I did hit it with a ir thermometer and highest temp reading was 155, we will be doing an impeller and thermostat on it as soon as they get here. The powerhead does not wobble much at all. This poor motor was neglected and is back...
  14. K

    1975 15 hp evinrude 15504C warms up then dies

  15. K

    1975 15 hp evinrude 15504C warms up then dies

    So pulled the flywheel just to check cause that's what I did to my 20 hp mariner recently, key is good and everything looks great in that area. So I went back through the work I did, I think I had a part in the fuel pump flipped. 😳. Found some junk in the exhaust hole, got that out. Was able to...
  16. K

    1975 15 hp evinrude 15504C warms up then dies

    Got spark for sure, I am growing a suspicion that the float got stuck in the up position blocking the fuel, I am gonna take it apart again and check.
  17. K

    1975 15 hp evinrude 15504C warms up then dies

    Good to know, thank you for that. We used a quick spray and that was it. I am going to get new plugs and test that. Only did the spark test by eye ball.
  18. K

    1975 15 hp evinrude 15504C warms up then dies

    So new motor project, trying to resurrect it. Not much information on the motor besides the guy before ran it out about 30 minutes and it died and that was it. He supposedly did a carb rebuild and other things on it, but when I got it, when pumping primer bulb gas was spilling from front of...
  19. K

    1975 15 hp evinrude 15504C warms up then dies

    Hello and let me thank anyone who has any advice on this topic for your time and advice. This 1975 15 hp evinrude 15504C, had a carb issue, it was missing the plug orfice and had a clogged/bad fuel pump, got those fixed and the motor started, ran beautifully for about 15 minutes, then started to...
  20. K

    20 hp Mariner No spark

    You know I forgot to snap a video, I will post one next weekend. Going fishing again. The Mariner looks good on the boat too.
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