make sure your jets aren't stopped up. that will cause that. here's the pictures
This is one of the carbs off a 225
these are the high / low jets clean them out. i take them out usually and clean in laquer thinner or just blow air in them to keep open. just don't mix them up and make sure all carbs have the same jet numbers. these are as follows upper is intermediate orifice #47 and lower is idle air orifice #34 in this case
Under this is the main fuel jet take to cap out and fuel should run out there is a number 62D or 63D jet in them usually. these are know as the High speed orifice #62D in this case
this is the air passage port cover can remove it and clean that too it will get stopped up too.
can open the bowl area / float chamber. this has the float, needle, and seat.
you can do these with out needing a rebuild kit.just be careful opening the covers without hurting the gaskets. Hope this helps