VicYour link deals with TT carbs. Question here is about 229 type, same goes for 274 Amals , I guess. Is there same brass plug with punch mark ? My thinking with these Amals was the fuel level has to be maybe max. 5 mm below air adjuster screw . So then that hole above the locating pin will be lower still - and drip.
Vic
Yes that hole you refer to is below the fuel level but that cavity the hole feeds into should not have fuel in it during normal running conditions. To get fuel leaking from there you either over flood the carb and so fuel flows over and through the pilot jet and down into the cavity /air feed area and out the hole Which is exactly what the hole is for. The other cause is the large gasket under the big nut that seals the bottom of the carb body to choke block is not sealing and letting fuel past or the needle jet is not seating correctly into the bottom of the choke block And letting fuel past.
I spent many hours studying where air should be and where fuel should be in these 89 Amal carbs and later 289 & 229 carbs.