Simplicity 11HP - Manual (Page 14)

SAFETY INTERLOCK SYSTEM
Your rider is equipped with a seat switch safety system
that will automatically shut the engine off when the oper-
ator leaves the seat with the ground speed control lever
in gear or PTO engaged. Once the engine has stopped,
the electric PTO switch must be turned off after operator
returns to the seat in order to start the engine.
On hydro models, the clutch/brake pedal (I, figure 2)
must be fully depressed to start engine.
Check the seat switch every fall and spring with the tests
listed below.
With operator in seat and ignition switch turned to ON
(engine not running):
8
WARNING
If the rider does not pass the test, do not oper-
ate rider . See your authorized dealer. Under no
circumstance should you attempt to defeat the
purpose of the safety system.
Features & Controls
Test 1 - Engine should NOT crank if:
A. seat is not occupied or
B. transmission lever out of neutral or
C. PTO switch engaged or
D. clutch/brake pedal not fully depressed.
Test 2 - Engine should crank if:
A. seat is occupied and
B. transmission lever is in neutral and
C. PTO switch is disengaged and
D. clutch/brake pedal is fully depressed.
Test 3 - Engine should shut off if:
A. operator rises off seat with transmission lever in
gear or
B. operator rises off seat with clutch/brake pedal not
depressed (parking brake on) or
C. operator rises off seat with PTO engaged.
NOTE: If operator returns to seat before engine stops,
the engine will re-start and electric PTO clutch will re-
engage.
Test 4 - PTO will disengage if:
A. operator rises off seat with engine running.
NOTE: If operator returns to seat before engine stops,
the engine will resume speed and electric PTO clutch will
re-engage.