Mercury V8 250 User Manual

Short Text Horn Action Long Text Quick Fault Resolution UFC PCM Fault Name
Active Exhaust Caution Service engine soon.
Active exhaust valve is not working properly.
Check active exhaust actuator
3002 16 AEV_OutputFault
Communication Error Caution Service engine soon.
There is a communication problem
with the SmartCraft control system.
Check wire connections and terminator resistors
4005 6 RxDoc2_SOH
4011 23 AuthTimeout
There is a communication problem with the SmartCraft control system. Cruise control may not work properly.
Check wire connections and terminator resistors
4010 6 RxDoc11_SOH
Critical ‑ Communication Error
Critical
Return to port immediately ‑ Service engine before next use.
There is a communication problem
with the SmartCraft control system.
Check wire connections and terminator resistors
4001 6 Demand_XCheck_Diff 4002 6 Shift_XCheck_Diff 4003 6 MicroChi_PWM_ADC 4004 6 RxDoc1_SOH 4006 6 RxDoc3_SOH 4007 6 RxDoc7_SOH 4008 6 RxDoc9_SOH 4009 6 RxDoc10_SOH
4012 6 Dual_CAN_SOH_Faults
4013 23 Watchdog_Active
4014 6 Crosscheck_Failed
4016 6 SPI_CrosscheckData_SOH
Critical ‑ Engine Sensor
Critical
Return to port immediately ‑ Service engine before next use.
Engine crankshaft or camshaft encoder is not working properly.
Inspect wire connectors, check G3 for RPM signal
1052 6 EncoderFaultCrankCamTrigger
Critical ‑ Engine Sensor
Critical
Return to port immediately ‑ Service engine before next use.
Engine Shift Demand Sensor is not working properly.
Check shift cable adjustment and shift demand sensor wire connection
1078 6 Dual_ShiftDemandSen_Fault
1077 6 ShiftDemandSensor_Diff
Critical ‑ Engine Sensor
Critical
Return to port immediately ‑ Service engine before next use.
Engine Throttle Demand Sensor is not working properly.
Check throttle cable adjustment and throttle demand sensor wire connection
1073 6 DemandSensor_Diff
1074 6 Dual_DemandSen_Fault
Critical ‑ Engine Sensor
Critical
Return to port immediately ‑ Service engine before next use.
Shift actuator is not working properly.
Use G3 to check shift actuator
1021 24 ShiftPos_RangeHigh 1021 25 ShiftPos_RangeLow 1023 24 ShiftPos2_RangeHigh 1023 25 ShiftPos2_RangeLow
Shift position sensor is not working properly.
Use G3 to check actual and demanded gear position
1024 6 ShiftPositionSensor_Diff 1025 6 Dual_ShiftPosSen_Fault
General Troubleshooting
Page 3A-4 © 2018 Mercury Marine 90-8M0146617 eng JULY 2018

Mercury V8 250 Specifications

General

Engine Type	V8
Horsepower	250 HP
Displacement	4.6L
Fuel Induction System	Electronic Fuel Injection (EFI)
Steering	Hydraulic Steering
Gear Ratio	1.75:1
Cylinders	8
Starting	Electric Start
Full Throttle RPM Range	5200-6000 RPM
Alternator Amp	85 amp
Shaft Length	25 in
Weight	527 lbs
Fuel Type	Unleaded 87 octane minimum