Didn't know you had to pre-clean the carburetor before installation this Friday? I left the carburetor in for 30 minutes the first time. When I pulled it out it was still fat! So I brushed it off and washed it off with hot water! The second time I left it there for an hour. I had to clean and rinse without water again! For the third time, leave the pieces there for 30 minutes. It turned out that they were fine. Pure? Much more work than I expected.