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  1. M

    40hp Dead Top Cylinder

    Matt, looking back over the posts in this thread, you did, and racerone was a repeat. Thanks again all ! mebehoof
  2. M

    40hp Dead Top Cylinder

    Problem Solved !!! A big Thanks to jimmbo, racerone and everyone except that one guy LOL you know who you are LOL. The answer was in jimmbo's last reply and racerone's answer to that. Here goes, as you all know when I first unwrapped and started the engine this Spring the Choke Primer was...
  3. M

    40hp Dead Top Cylinder

    jimmbo, Yes on fuel in float bowl. No way to tell if fuel is passing through internal carb passages. Yes on correct gaskets, needle/seat, plugs, nozzle gskt, intake gskt, o-rings correct and all the gskts were cut for the passages that exist on this carb. Air circuit passages are open. I have...
  4. M

    40hp Dead Top Cylinder

    Attached is a blowup of this carb showing the nozzle gskt.
  5. M

    40hp Dead Top Cylinder

    racerone, I don't know what that is? What do you mean by nozzle? I know what the nozzle gasket is, there was a new one in the carb kit. It is a Johnson Brand kit. The little brass tube sitting inside the larger one with the holes in the side is way off center I think that's the idle fuel...
  6. M

    40hp Dead Top Cylinder

    racerone, Easy to resolve? How so? What am I missing here? It was running perfect when put up last Fall but this Spring, well, you know the story. Please share what you obviously see that I don't. Really want to use this boat.
  7. M

    40hp Dead Top Cylinder

    I just came back in from swapping the carbs once again and the problem followed the carb yet again. top to bottom, bottom to top then pulled plug wires to see which cylinder was carrying the load and as mentioned above the problem follows the top carb. Thoughts???
  8. M

    40hp Dead Top Cylinder

    jimmbo, OK, I understand what you mean but one of the things I did in working with this is to swap the carbs and when I did I moved the problem to the bottom cylinder. So what I'm saying is that the problem followed the carb. So I'm really perplexed on this. I keep hearing "pull the head" and...
  9. M

    40hp Dead Top Cylinder

    Well, here's results of my efforts: Overhauled just the top carb, reinstalled it and it's acting the exact same as before doing the carb. Runs on lower cylinder only, when I pull the top wire there is no change, when pulling bottom wire it dies. Spark is normal on both plug wires, I had two...
  10. M

    40hp Dead Top Cylinder

    jimmbo, At this time I'm waiting for a couple carb kits w/everything. We'll see how to shakes out. This 40hp was not run this Spring for any length of time hopefully no damage done. Will post as soon as have results. To All, I really appreciate all the input from all of you folks, Thank...
  11. M

    40hp Dead Top Cylinder

    Anyone have any idea where to find a replacement top carb for this 40hp Johnson Model#J40 ELCDE carb #395790 MX K 04 L K Carb #395790 MX 04 L K Any help will be greatly appreciated. Found (I hope) complete rebuild kit from the place cyclops222 mentioned @ www.crowleymarine.com Gonna...
  12. M

    40hp Dead Top Cylinder

    cyclops222, Moved carbs and moved the problem to the other cylinder. took carb off, soaked in dip and cleaned it up and blew it out... put it back in its original spot (bottom) still same problem. Once again just to be sure moved to top cylinder and it moved the problem... Question: could this...
  13. M

    40hp Dead Top Cylinder

    Crosbyman, Thank you for the video, very helpful. I should change my handle from mebehoof to 2stroke/student mebehoof
  14. M

    40hp Dead Top Cylinder

    racerone, OK, since each cylinder is independent regarding fuel/air and compression that narrows the problem down a bit. I just got rained out pulling the reeds but with the carbs off and a flashlight they look really clean and seated from the carb side. Pristine clean. I'm wondering that...
  15. M

    40hp Dead Top Cylinder

    Crosbyman, Thanks for the tutorial regarding 2 stroke reeds and function... appreciated. mebehoof
  16. M

    40hp Dead Top Cylinder

    racerone, Amen to that Sir! I'm pouring over YouTube and any info I can find to try to understand things 2 stroke. Question: on this 40hp Johnson is the crankcase common, i.e. shared by both cylinders or partitioned so each cylinder has its own fuel/air ? Also, as I mentioned in a couple...
  17. M

    40hp Dead Top Cylinder

    cyclops222, I was wrong regarding no suction on top cylinder at carb. I started the engine and allowed it to run on the lower cylinder and rechecked all of the items I had posted. As stated, I was WRONG regarding low or no suction on top cylinder it is the same as the bottom cylinder. I'm...
  18. M

    40hp Dead Top Cylinder

    jimmbo, OK, here goes... First, I was wrong about suction on top carb, it is about equal to bottom carb. Still has spark from both coils and plugs are firing. Fuel is available and I have spritzed raw mix-fuel in top carb with no change in RPM. The oil streaks are on the lower housing on the...
  19. M

    40hp Dead Top Cylinder

    I'll be tearing into it later this afternoon. Also curious why pulling the head is what seems to be the first option in this diagnosis? Regardless, based on the input from the good people that took the time to post (such as yourself) I'm going to follow their lead and see where it takes me. FYI...
  20. M

    40hp Dead Top Cylinder

    tphoyt, I get it and do appreciate the effort and thought sharing info means. I sought out this forum and look forward to sharing as time goes on. Hopefully whatever I have to do to fix this 40hp Johnson will help some other person deal with a similar issue. Thanks for the post, mebehoof
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