1992 15 hp johnson needs choke out to run/ won't idle slow

[bassplaya]

1992 15 hp Johnson
I can't get the idle very low and can't run engine without the choke closed about 1/3.
I have cleaned the carb by soaking over night in cleaner and used a kit to reinstall. Carb is spotless.
I notice upon reinstallation that the top carb cover does not appear to seat properly. There is not a screw in the top right corner and it does not tighten down on the gasket. Could this be sucking air? Hence the choke needing to be partially closed to run.
I was able to get it to idle slow with the choke closed only after four complete turns of the needle valve. It sounded great until i throttled up a bit. Then it bogged down and had no power. As soon as i put in gear it died, even at high idle. And i mean high.

Is there a fix for the top carb cover?

Could this be why the choke has to be partially closed to run?

Is this my slow idle problem?

PS: the new needle valve retainer was so tight it stripped out the knob and now i have to use channel locks to turn valve. Great

 

[bassplaya]

Re: 1992 15 hp johnson needs choke out to run/ won't idle slow

Also, the motor runs alot different when the air silencer body is off than on. I get it running ok with it off and then reinstall and no go.

 

[mikesea]

Re: 1992 15 hp johnson needs choke out to run/ won't idle slow

Those plastic covers will warp if not tightened by the sequence that should be stamped into it,I believe there is a fix for adding a screw ,possibly on the scheppa 9.9/15 website

 

[bassplaya]

Re: 1992 15 hp johnson needs choke out to run/ won't idle slow

yea its warped. Sorry design.
My problem was, the neddle valve was going in to far. carb cover worn out and needs replacing