Search results

  1. B

    No spark on 2 of 4 cylinders

    The top 2 have no spark. All 4 coils test good with similar readings. The 2 with no spark share the same ground but I undid it and it looks/seems fine. Mercury Classic 50 #0A959445 What next?
  2. B

    Classic 50 fuel pump?

    That looks like my carburetors. So I guess no fuel pump even though my # starts with 9. I guess I'll replace the impeller and see what I find in there. I seems to pumping well so I'm not confident my engine problem will be found down there. But I do have a slight gear oil leak so it won't be a...
  3. B

    Portable tank vent ? Connector?

    Idles and revs fine with high idle lever with muffs. Won’t go past 1/4 throttle under way.
  4. B

    Portable tank vent ? Connector?

    Apparently the fuel pumps are in the carbs. so...yes?
  5. B

    Portable tank vent ? Connector?

    Fuel flow seemed good when I forgot to depressurize before pulling the carb. hose and it flowed heavily until I disconnected from the tank. I bought carb. kits. They looked very clean inside so I only replaced the floats, float needles, diaphragms, and gaskets. Jets were clean. I shot carb...
  6. B

    Classic 50 fuel pump?

    130 lbs. compression on the 3 cylinders I can get at. Will check other suggestions. Thanks.
  7. B

    Classic 50 fuel pump?

    A959445 Thanks. I guess they must be in the carbs. on this one. Not sure what else to try except checking for exhaust blockage.
  8. B

    Classic 50 fuel pump?

    Trying to figure out why this engine won’t rev. I suspect the fuel pump. But I don’t see one. Do these not have one or is it somehow located in the block under where the quick fuel connector comes into the lower cowl?
  9. B

    Portable tank vent ? Connector?

    It’s a Classic 50 4 cyl. 2 carb. New to me. Won’t rev past 1/4 throttle. New plugs. New carb floats and needles. New diaphragms. 130 lbs. compression in the 3 cylinders I could test. Starts, idles, and revs well with high idle but not in gear with main throttle.
  10. B

    Portable tank vent ? Connector?

    Thanks for confirming the tank cap. I confirmed that mine does depress the pins and does vent. I just had it in the water again. I loosened the cap just to rule that out. Still bogs/dies above 1/4 throttle. I had the carbs. apart again last night and didn’t find anything wrong. The floats were...
  11. B

    Portable tank vent ? Connector?

    Bottom line...when I twist the tank cap there is usually pressure or vacuum released. Would this be the cause of the engine to wanting to die above 1/4 throttle? Should I replace the tank's quick connector or tear the carbs. down again or replace the fuel pump next?
  12. B

    Portable tank vent ? Connector?

    I just noticed that the 2 small pins above the right pin release pressure from the tank when I press them in. I guess maybe they aren't getting pushed in enough by the connector?
  13. B

    Portable tank vent ? Connector?

    Are you saying that the cap is wrong for the tank?
  14. B

    Portable tank vent ? Connector?

    No vent that I can tell. The cap is just like a car's radiator.
  15. B

    Portable tank vent ? Connector?

    I have a metal 5 gal. tank that has a cap like a car's radiator and a quick connect fitting. When I have loosened the cap there can be a lot of pressure (or vacuum?) released. Is that normal? How are these tanks supposed to vent? Is it through the quick connect fitting? I had cleaned the carbs...
  16. B

    Classic 50 not returning to idle

    Thank you. That barrel adjustment makes good sense. Hadn’t thought of that as I assumed it was set prior to me getting it. I could do compression checks easily on 3 cylinders but not sure I can get to the 4th so I’ve been avoiding that test. I’ll give it a shot.
  17. B

    Classic 50 not returning to idle

    I'm chipping away at trying to get this old girl running right. When I lift the high idle lever and then put it back down the throttle pivot mechanism doesn't return to low idle. I can push it back that 1/4" or so with my hand with no trouble at the engine. The pivot mechanism all seems to be...
  18. B

    Plug gap for BUHW-2 / 5626 plugs on 1986 Classic 50

    Sorry. I wish I knew how to delete this thread. I just took one of my new plugs out of the box and there's no wire to adjust. lol Sorry for wasting time and space.
  19. B

    Plug gap for BUHW-2 / 5626 plugs on 1986 Classic 50

    I searched but wasn't able to dig this up. Gap spec. would be greatly appreciated.
  20. B

    Classic 50 levers/controls.

    Sounds way too easy but will try that. Thank you.
Top