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Discussion Starter #1
I got a new carb for my 250 and it's missing a screw its threaded with small hole in bottom is this ok my stock carb this area is closed what do I need to do ?
Screenshot_20200324-123622_eBay.jpg
 

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Super Moderator "Loose Nut"
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Looks like the PSM screw housing. Stock there is a cover there, that most remove to richen the mixture up some.
 

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Can you look down in it and see a screwdriver slot?
If you can then the PMS adjuster screw is there and can be adjusted to 2 to 21/2 turns out from lightly seated.
 

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Super Moderator "Loose Nut"
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Pulled up carb diagram, look at number 10 in picture, that's the PSM screw, shows to be in the hole you have circled with a cap, #11, that covers it.

92673
 
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