Mixture adjustment honda hru 173

Hi this most honda engines dont have a mixture adjustment screw they only have a air bleed adjusment on the front of the carby close to the head though you can only move it a bit either way on some others should be about 2 turns out from closed, the main problem that honda engines have is they will still run with water in the carby , I would try cleaning out the carby bowl first its only held on with a bolt in the centre.