1992 140 Johnson intermitent power loss

[11WFLA]

I have a 1992 Johnson 140.. _sometimes on excelleration it doesn't hit on all four .then it will catch up. Sometimes when at cruising speed it will begin to loose rpm and skip ...if i back off to 4K rpm it smooths out..then I can put the juice to it and it will go to 5200 just fine..the skipping comes and goes...put in new fuel filter..new plugs.. it has a water/fuel separator...I drained and re primed it..when it starts skipping..tried pushing in the choke to see if it was starving for fuel...it just wanted to cut out...as it should..help...thanks

 

[11WFLA]

Re: 1992 140 Johnson intermitent power loss

well I guess I stumped the elders...no one wants to touch this one...I'll just take to my local "stealer" and put in the tank....thanks anyway

 

[angus63]

Re: 1992 140 Johnson intermitent power loss

If only when warm then it could be electrical. Being it occurs at high speed could be vibration knocking something loose. First I would check all of the grounds for cleanliness and tightness (especially the coils and powerpack). Next I would run at night with cover off and look for sparking. It could be so many things that i would eliminate the easiest and cheapist first.

 

[93bronco]

Re: 1992 140 Johnson intermitent power loss

when was the last time carbs were rebuilt?<br />if you havent you should read 'whats wrong?-1990 johnson 120' by sunbird1.<br />there is some good info in there that mite help.<br />other than intake/reeds & jetting the 120 is identical to the 140.<br />-<br />i hope to have up & running by the weekend if i can find a used T/T motor.