OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Honda Engines Pressure washer engine's Honda GX390 remove gum from carburetor's internal

Dear All

I have got a Kartcher pressure washer 4000 psi 3.6GPM with Honda GX 390 ,,,,I have used 3 times so far and I forgot to drain petrol before store in its shed,,,,,basically it is new

Yesterday when I tried to clean the carburetor I realized it is badly covered with gum and I used a carburetor cleaner ,,,,it cleaned it but not completely clean


I don't have ultrasonic machine and I prefer not to use a harsh chemical ,,,,,what other suggestions can be considered ?

Thx