Foam Restrictor on the left is for use with models 560 and 660.
Foam Restrictor on the right is for use with models 565, 665 and 700.
Foam Restrictor has 3 jobs.
1.
To keep suds away from the motor.
2. To keep the motor cool.
3. To act as a shut off in case of high water.
It is strongly recommended not to operate your
motor without one.