Adjuster spring.

Fits:
Briggs & Stratton Classic
Briggs & Stratton Sprint
Briggs & Stratton Quattro

Briggs & Stratton Engine Models:
098902
09C902
09D902

Replaces original numbers:
Briggs & Stratton 691859
Briggs & Stratton 263109
76-520

Quality spare part from Belgian Eurogarden.