Search results

  1. L

    1978 70HP Evinrude Fuel Pump

    Thanks for the info, carbs don't have any adjustments, they used fixed jets. I verified TDC matches flywheel pointer. I could buy a fuel pump but I'm not down currently, just wanted to investigate the fuel pump as it's condition is unknown. Seems it was in decent shape and just want to replace...
  2. L

    1978 70HP Evinrude Fuel Pump

    I will review the gaskets and see if there are any visible edge defects on the gaskets. For the fuel pump do you know of a rebuild kit for this specific pump. I would like to replace the gaskets that I have taken off already.
  3. L

    1978 70HP Evinrude Fuel Pump

    No holes or tears.
  4. L

    1978 70HP Evinrude Fuel Pump

    Here is a photo of the diaphragm.
  5. L

    1978 70HP Evinrude Fuel Pump

    I will post a picture of the diaphragm tonight, after removing the gaskets and diaphragm I would like to replace those components. I am unable to find the correct parts kit for this. History: Bought the motor used to repower late last year. Compression of 120 on all cylinders. Did a full...
  6. L

    1978 70HP Evinrude Fuel Pump

    I am replacing the internals of the fuel pump on my '78 and took the part numbers from the engine and diagram on marine engine. Ordered the Sierra rebuild kit for this year's pump and started tearing down the old one when I ran into an issue. The old pump has 2 reeds instead of check valves in...
  7. L

    Top cylinder not firing Johnson 55ESL69A

    yes, that is the starting point I used for all of them. Middle carb is very close to that starting point and top and bottom are just over 1/8 of a turn in from that starting point. That seems within the expectancy of the tuning procedure unless I am missing something?
  8. L

    Top cylinder not firing Johnson 55ESL69A

    Starting from top cylinder low speed mixture screws: Less than half turn (3/8 turn to 7/16) Less than 3/4 (just under) Less than half turn (3/8 turn to 7/16) Operation of the boat is rough idle like above, but good once going full throttle and then coming back to idle it sounds great...
  9. L

    Top cylinder not firing Johnson 55ESL69A

    carb rebuild was all new parts, replaced the plastic valve retainer as well. The spark tester is an open air adjustable as I showed in the photo attached to that post. Jumps a 0.35" gap in air.
  10. L

    Top cylinder not firing Johnson 55ESL69A

    When I did the carb rebuild I put in all new plastic seats for the low speed needle. Here is a video of it running in the driveway, sounds better than it did I think after re gapping the breaker points again. Still sound like an occasional misfire, maybe lack of back pressure? Thanks, Joe
  11. L

    Top cylinder not firing Johnson 55ESL69A

    I removed the lead from the plug and used one similar to that to do the testing for the above results. Compression test was odd, engine would not turn over at WOT, i am sure there is a way around it but I didn't spend the time. Instead I opened the throttle plates by hand and turned over the...
  12. L

    Top cylinder not firing Johnson 55ESL69A

    Live around the Milwaukee area of WI. I am going to look at the points again today as i know the surfaces of the points are not parallel. Not sure if that would cause this issue directly, but may as well see if I can adjust and fix. Will also be doing a compression test today to have the...
  13. L

    Top cylinder not firing Johnson 55ESL69A

    I checked the thermostat over the weekend as well thinking that maybe the engine never gets to properly warm up until going into forward and revving it up. It is working, opens a little late at ~155°F. Replacing it since it appears original. Which linkages specifically F_R? Also thanks for the...
  14. L

    Top cylinder not firing Johnson 55ESL69A

    Yes .350 is the measurement, so over 5/16. Glad to hear that is good, manual and others have said 7/16 to 1/2 it should jump so I wanted to check. The amplifier was replaced in 2000. Any thoughts on the idle being so much better after going into forward gear a bit and then coming back...
  15. L

    Top cylinder not firing Johnson 55ESL69A

    I checked the points and they were had a bit of carbon buildup on them. Cleaned them up and set the gap to 0.010". Engine seems to run better after that but I am still concerned that I am not always getting spark on the top cylinder. Took it out and tested it on Friday and had it running ok...
  16. L

    Top cylinder not firing Johnson 55ESL69A

    Hi all, Took the boat of for the first time today after rebuilding the carburetors and setting the idle in the driveway. Got it out on the lake and it started up with the fast idle but always has a chug to it, not quite a misfire all the time but sometimes a complete misfire will occur. Got it...
  17. L

    55ESL69A electric solenoid assembly

    I eventually got it back in place after taking a break and looking at it again this morning. I had to assemble all pieces and slowly wiggle back and forth. Eventually i felt the plunger seat down in the cavity. Not sure how to know the wave washer is in the correct spot but everything felt...
  18. L

    55ESL69A electric solenoid assembly

    I have a Johnson 55 HP (55ESL69A) and I am redoing all of the lower unit seals. The unit runs well enough but there was water in the lower unit oil so i decided to learn a bit about the engine and replace all the seals. I have replaced all of the oil seals and was working on replacing the gasket...
Top