Pro Boat PRB2550 - Manual (Page 14)

14
The centrifugal clutch automatically engages when
the engine rpm is increased. Be sure that the idle
speed adjustment is set low enough so that the
propeller does not rotate at idle.
Periodically disassemble the clutch and clean debris
from the clutch shoes and the inner clutch bell with
DYN5505 Dynamite® Nitro Force.
Section 14: Clutch