RE: My DLE 55 does not like to pull fuel to the carb after it sets for a while.
You can solder the hole shut (I would remove the choke plate from the shaft first ,and be sure to put some loctite on the screw when you put it back).
The cause of the problem is probably the carb diaghram.
You should not need to close the hole in the choke if the diaghram (fuel pump) ,is working correctly.
Put a carb kit in it and be sure to replace the diaghrams and clean or replace the internal screen while your in there.
K20 WAT is the kit number - many sources on ebay