The model DD was a Marvel-Schebler model that was taken over by Zenith after 1982.
More information on the Marvel-Schebler/Zenith DD
More Information
How to find Zenith carburetor numbers
The model DD was a Marvel-Schebler model that was taken over by Zenith after 1982.
More information on the Marvel-Schebler/Zenith DD
How to find Zenith carburetor numbers