Polaris msx 110 Service Manual

FUEL INJECTION / IGNITION / EXHAUST SYSTEMS
5.352004 Four Stroke PWC Service Manual
RPM Limiting Modes
The engine management software will limit engine RPM in several different scenarios. Engine RPM is limited
to protect either the operator or engine from injury of damage.
RPM will be limited when the following occurs:
Limit Mode
Approximate
RPM
Trigger
Idle RPM 1550 ± 50 Normal Operation
Maximum Engine RPM 7800 -- 8400 Rev Limiter Function
Limp--Home Mode 1750 Failure with either the ECU, ETB, or PPU components.
Reverse Mode Anti--Submerge Protection
3400
Operator moves reverse handle from forward to position
to either neutral or reverse positions.
Overboost Protection Mode*
4700 -- 4800
110: Boost exceeded .8 -- .9 BAR for more than 400ms.
150: Boost exceeded 1.3 BAR for more than 400ms.
Engine Temperature Overheat Protection*
1600 -- 1800
The engine coolant temperature exceeds safe operating
range.
Exhaust Manifold Temperature Overheat Protection
1800
The exhaust manifold freshwater cooling temperature
exceeds safe operating range.
* = Indicates a TORQUE REDUCTION running mode. The ECU limits engine RPM by limiting the amount of
torque generated by the engine. Stated RPM limit is an approximation and changes with current engine operating
conditions.
The throttle plate opening (aperture), ignition timing, and fuel supply are controlled by the ECU to limit engine RPM
in all modes except in the LIMP--HOME MODE.
Ignition timing is gradually retarded as the engine RPM reaches the established RPM limiter specification. If RPM
exceeds 7600 RPM, ignition timing is retarded and fuel supply to one or both cylinders is reduced.
The limp--home mode occurs whenever a problem is detected as a safety issue in the Electronic Throttle Circuit.
The ECU will cut power to the ETB in the event of a PPU, TPS, or wiring failure. When in the limp--home mode,
the throttle plate returns to it default, non--power position. This position represents 6% open or approximately
1750 RPM.
Cold--Start Protection
The ECU will limit engine RPM to idle speed during a cold startup. Full power will return when the engine coolant
temperature exceeds 140_F(60_C). The cold--start protection will last approximately 30 seconds after initial
startup depending on current conditions.

Polaris msx 110 Specifications

General

Brand	Polaris
Model	msx 110
Category	Boat
Language	English