Need Help 1976 Jon 55HP-Will Not Idle

[Max Thrasher]

I am having problems with my 1976 Johnson 55hp. 55EL76. The problem is is that it will not idle as if it is not getting enough gas. I have cleaned and rebuilt the two carbs myself more than once, everything but letting them soak in cleaner. I have taken apart the brand new fuel pump, inspected it and it was fine. To keep the engine running I have to constantly hit the choke every few seconds. May there be a problem with my electrical system or should I take my carbs to a mechanic to get someone else to clean them? Also, it may be backfiring. And if it is, it is doing it a lot. Thanks for any help

Other miscellaneous things that I've done is change out the exhaust housing, lower unit and head gaskets. Also, the engine has only 100 hours on it and pushes 140 psi on the compression test.

 

[tashasdaddy]

Re: Need Help 1976 Jon 55HP-Will Not Idle

when you clean the carbs did you remove all the jets, sounds like clogged low speed jets. compresssion is great. hitting choke shows fuel starvation, not electrical problem. if your engine has fixed jets, you have to remove the cover plugs, and use the special tool to remove. new plugs are in the rebuild kit. you can check the engine diagram here: http://www.evinrude.com/en-US/Accessories/Literature/

this is the special tool, can be made from a quality screwdriver, or buy at dealer. http://i155.photobucket.com/albums/s311/frankr_photos/FixedJetScrewdriver2.jpg?t=1177353186

 

[Max Thrasher]

Re: Need Help 1976 Jon 55HP-Will Not Idle

I have taken those out cleaned the jets and then replaced the caps.