1993 25hp Johnson bogging down

[3with1shot]

Cleaned carb 2 times. High speed jet is clean and float is adusted correctly. Starts & runs but just acts like it is not getting enough gas to open up at full throttle. new tank and lines as well.. Any ideas? Please help..Thanks..

 

[Daviet]

Re: 1993 25hp Johnson bogging down

Is the throttle plate opening all the way? Try pumping the primer bulb at WOT and see if it picks up, might ba fuel pump problem.

 

[3with1shot]

Re: 1993 25hp Johnson bogging down

Throttle plate opens all the way. I did enlarge the high speed jet .003 to increase gas flow but that did not help. Leaning toward fuel pump, powerhead, or bad compression..

 

[3with1shot]

Re: 1993 25hp Johnson bogging down

Any ideas?

 

[Al-53]

Re: 1993 25hp Johnson bogging down

why did you enlarge the jet..it was made for that engine.....

now check compression and spark ..

did you rebuild or just clean the carb.....did you wire out all the jets....take off the welch plug and clean under it....blow out all the orfices...you may have something still in there if you did not do it correctly....

Al