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  1. K

    1975 25 hp Evinrude 25502B

    Well had to be done. I will swap carbs after it together and see if it's that
  2. K

    1975 25 hp Evinrude 25502B

    Would the baffle gasket leaking cause that idle issue? Or the missing drive shaft oring? Or the damaged waterpump grommet?
  3. K

    1975 25 hp Evinrude 25502B

    165738 was the way the bearing was and was correct. 165741 is the bearing.
  4. K

    1975 25 hp Evinrude 25502B

    195928 pic was facing the bearing. 155508 was facing the spring and that is fuel mix on that side of the seal. I will post pic of bearing as soon as I get home. Thanks again for you time and reply.
  5. K

    1975 25 hp Evinrude 25502B

    Bottom of lower crankshaft seal. There is a small knick in it....
  6. K

    1975 25 hp Evinrude 25502B

    Well that was easy. Clip spring and pulled the lower seal. Will update when she's all back together. Hoping for a good idle. There was some fuel on the top of the seal, so it could have been leaking. Rubber inside looked old and worn too.
  7. K

    1975 25 hp Evinrude 25502B

    @F_R any ideas what could cause the dying when throttle valve closed? After taking this thing apart I know several things needed to be fixed, driveshaft o-ring, baffle gasket, water pump grommet, and I will replace the lower seal just for knowing it's done. Probably replace impeller since I am...
  8. K

    1975 25 hp Evinrude 25502B

    I will inspect it later today. Got new baffle gasket and carbon seal on the way. Gotta find a cover seal though, they are scarce.
  9. K

    1975 25 hp Evinrude 25502B

    So what needs to be done to get that lower crankshaft carbon seal out? What bolt do I loosen, the two on the side then what others, I think I read something about 3 bolts need to be loosened and then the seal will come out...
  10. K

    1975 25 hp Evinrude 25502B

    Well I took it apart today. Found that the drive shaft o ring was gone, water pump grommet was all messed up and broken, baffle gasket was gone, and the housing cover seal was gone. Assuming that was all bad, I am sure the carbon lower crankshaft seal is bad too. Before I order all the things I...
  11. K

    1975 25 hp Evinrude 25502B

    Yeah I was suspecting that too. Compression is 130/135. Plenty of compression. When I put the hood on it runs a little better. I am showing it tomorrow. I have it up for sale soo we will see what goes down. I had it to the best it was gonna be that last video I put up. Then I pulled the...
  12. 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?
  13. 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...
  14. K

    1975 25 hp Evinrude 25502B

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

    1975 25 hp Evinrude 25502B

    Both look like this. Got good spark.
  16. 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?
  17. 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...
  18. 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.
  19. 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...
  20. 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?
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