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  1. Big Jay

    Johnson 50ESL72C Fuel Pump

    Good morning everyone, my '72 50hp started surging last night at higher rpm exhibiting signs of a failing fuel pump. I've looked around, but there seems to be no rebuild kit affiliated with my model available. Am I losing it?? Thanks in advance for a little direction here...
  2. Big Jay

    Upper / Lower Bearing Install

    Hey everyone, still working on my complete tear down / rebuild and I've just replaced my upper and lower crank bearings on my '69 Merc 1000ss (2685637) and I used a hydraulic press to put the new ones on. Now, I was just reading another thread where someone mentioned the need to heat them up...
  3. Big Jay

    Timing on a '69 Merc 1000

    Hello again, I've almost completed my fuel system overhaul and will soon be ready for the link n sync procedure. Now I've been reading up a lot in this awesome forum on how the timing recommendations in my original merc service manual won't do to well with today's fuel, though I haven't seen...
  4. Big Jay

    Couple of fuel system questions

    Hey guys, I'm just about to rebuild the 2 fuel pumps on my '69 1000ss as part of a fuel system overhaul and looking at my parts catalogue, it shows them as 2 different part numbers. My question is what, if any, differences are there between them? Also, what's the best way to go about...
  5. Big Jay

    50 Years!

    Hi guys, just wanted to share something here that I've found. Sometimes the ghost in the engine is real!! I can't help but wonder how many owners, mechanics and backyard tinkerers over the last 50 years have been stumped on this engine.. or worked on it and missed it! 1969 Merc 1000 Tower of...
  6. Big Jay

    Lower Crank Seal

    Hey guys, I picked up a spare '57 18hp for parts and have been cleaning it up so it's not nasty to work with later, as well as to make sure everything is ok on it. When I popped the powerhead off the leg however, I found this laying in the baffle: Is it as simple as replacing these 4 parts...
  7. Big Jay

    New Problem FD-12___VIDEO

    Anyone ever seen this? I go to accelerate, and about 3/4's of the way up I get a stranger shudder or hesitation like it's missing or something. It will sometimes do it to the point that it lasts a long time and will not kick in like it does in end of this video, I either wind up running it at...
  8. Big Jay

    '57 & '58 johnson 18hp parts swapping

    FD-11 & FD-12, hoping to use the '57 as a parts engine. Are there any differences I should be aware of ? I need to swap the swivel-brackets and motor-mounts, I had hopes of using the carb too, but upon closer inspection someone jammed the SS needle and caved the housing in :(.
  9. Big Jay

    :) Brought Home "Another" Motor Today :)

    The wife may kill me, but what the heck :rolleyes: . Johnson 50ESL72C, 1972 I believe. I can only hope this was a smart buy at $400, with a spare motor and a half, 2 spare props, and spare controls. Compression hasn't been tested, but it was a friend who sold it to me, I've ridden in his boat...
  10. Big Jay

    Tiller Twist Grip Tension Adjust

    '58 Johnson FD-12 18HP, the throttle seems like it could have a little more resistance/tension. My dad's Merc has a knob on the end you tightened down to increase the "drag", mine has a screw on the side of the grip but seems to have no effect one way or the other... is it just an assembly...
  11. Big Jay

    Motor-tone changes at wot

    Re: Motor-tone changes at wot This sounds exactly like my problem bbstacker1, if I slow it goes back to normal too and I sometimes don't need to slow much. I had originally suspected a flow issue in the exhaust port too, but thought maybe that was too simple... maybe wrongly so. It's almost...
  12. Big Jay

    --video--1958 fd-12--running great--many thanks--

    I always see the long-timers in the forum requesting video... So here's mine :D
  13. Big Jay

    Motor-tone changes at wot

    Talking about my '58 Johnson FD-12 again, maybe this is normal, I don't know.... The only way I can describe it is if you voiced a flat vowel "Aaaa" and held it, this would represent the normal "tone" of the motor at WOT. Now, if while holding the "Aaaa" you changed it to an "Oooo" and voiced...
  14. Big Jay

    Wider Plug Gap for Trolling?

    FD-12 1958 18hp I've seen it posted here a couple times about gaping the J6C's to .035 instead on .030 if you do a lot of trolling to keep from fouling the plugs. I use this engine as a get-there unit as well as troll a lot with it, would this be a wise thing for me to do? As always, thanks...
  15. Big Jay

    Hole in Carb ???

    Re: Hole in Carb ??? Oh crap!! lol I hope it's the right carb, there are some mounting screw holes for something on the starboard (same side as said hole) side that I'm not sure of tho... Here's some more pics in hopes that you can tell me if it's the wrong one (Good Lord)
  16. Big Jay

    Hole in Carb ???

    Model FD-12, 18hp Johnson.... This hole is leaking a lot of fuel when my engine is in the upright tilted position. (red circle at tip of screwdriver) It looks factory made... but I'm not sure, any ideas on what it is? Is it supposed to have a lead shot or something? It's not very big in...
  17. Big Jay

    Steering Bracket Stops Engine from Trimming....

    Re: Steering Bracket Stops Engine from Trimming.... Thanks for your patience guys... OK, here's the set up as it stands : I don't know if there's any room to make any adjustments... or to add the piece you're recommending Frank, what do you think?
  18. Big Jay

    Fuel Runs from Carb When Motor is Tilted Up

    Re: Fuel Runs from Carb When Motor is Tilted Up Alright... I tore it down and bent the float a tad to eliminate it as the culprit, started right up and let it run for a few. Shut her down, released the pressure in the tank and disconnected the fuel line and tilted it all the way up. Still...
  19. Big Jay

    Compatible Parts 'Rude 4441 / FD-12?

    Hello again, picked up a '51 14hp Evinrude for $25 because the prop looked like it'd fit my '58 18HP Johnson (which it did, tho it's a different shape). On closer inspection, the gear-cases look to be the same size. I cant find a parts list/catalog for the 'rude to save my life, I want to know...
  20. Big Jay

    Fuel Runs from Carb When Motor is Tilted Up

    I've posted about this motor before and had great help. This is something I've just noticed yesterday however... 1958 FD-12, after some fun in the sun I go to trailer the boat at the launch, but first I need to tilt the motor to the up position. I looked back as I clamped the trailer winch to...
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