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Johnson 9.9 - Can't get float seat out of carburetor body

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Johnson 9.9 - Can't get float seat out of carburetor body

Old 09-29-2020, 02:52 PM
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Default Johnson 9.9 - Can't get float seat out of carburetor body

I'm in the process of rebuilding the carburetor on my 1997 Johnson 9.9. I have an OEM OMC rebuild kit. The carb was easy to remove and disassemble except for one part. I cannot get the darn brass float seat out of the carb body. I tried shooting some PB Blaster into the brass fuel line barb in hopes that it would penetrate the threads on the back side of the seat. The seat itself has a plastic O-ring gasket where it mates to the carb body so there's no way to get PB Blaster into the threads any other way than from the back side. From my couple attempts, I started to wear the slots on the seat where the screw driver goes. I didn't mess up the hole where the needle goes into the seat though so I could put the carb back together with the same float needle and seat at this point. But I'd like to replace them while I have the carb apart and since a new float, needle and seat came in the rebuild kit. I've rebuilt numerous carbs on various engines over the years and never ran into a problem until now. Anyone have any tricks for getting this float seat out of the carburetor body?

BTW, I'm rebuilding the carb because the motor was stalling when the engine was in gear at the slowest throttle setting. Ie. Carb slow speed circuit needed cleaned.
Old 09-30-2020, 04:11 PM
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This doesn't answer you question ,but...
Would it help clean /smooth the seat in place if you cut off one end of a Q-tip and chuck that end in a drill and use polishing compound or non-gel tooth paste on the cotton end to lap the seat, flushing well with carb cleaner and air jet after?

Carb jet brushes ( w/ carb cleaner) are handy for the jet orifices.
When using the screwdriver to try to remove the jet seat, it can be critical to use the exact correct size ( width & thickness) screwdriver so you can apply a lot of unscrew force w/ least chance of damage.
Old 09-30-2020, 05:01 PM
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If there's nothing wrong with the original seat use it. Don't break it trying to fix it.
Old 09-30-2020, 08:17 PM
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Problem starts with using wrong tool...... But once you mess that slot up you got trouble.

Just leave it. Is the new needle metal or rubber tipped?

I've never actually seen a worn seat/needle. Im sure its possible.


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