I’ve used SeaFoam with pretty good results. On a recent job, I soaked the piston crowns in a small pan filled with Berryman’s B-12 fuel system cleaner which worked very well. See pics. With either the Berryman’s fuel system cleaner or their carb dip product, you have to leave it soak a good while.
Attachments:
Bob
1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20
“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."
