Mercury V8 300 User Manual

Short Text Horn Action Long Text Quick Fault Resolution UFC PCM Fault Name
Trim Caution Service engine soon.
The trim down relay is not working properly.
Swap relays, check wiring
3182 16 TRMD_OutputFault
The trim up relay is not working properly.
3181 16 TRMU_OutputFault
Voltage Caution Service engine soon.
Sensor power supply voltage is high.
Check wiring for shorts or opens
603 4 XDRPc_RangeHigh
Sensor power supply voltage is low. 603 5 XDRPc_RangeLow
Warning Horn None Service engine soon.
Warning horn in boat is not working properly.
Check wiring connections
3152 16 HORN_OutputFault
Water in Fuel Caution
Service engine soon ‑ Refer to Owner's Manual for service procedure.
There is water in the fuel system. Continued operation may cause engine damage.
Drain filter 1108 25 WaterInFuel_RangeLow
General Troubleshooting
90-8M0146617 eng JULY 2018 © 2018 Mercury Marine Page 3A-9

Mercury V8 300 Specifications

General

Horsepower	300 HP
Displacement	4.6 L
Full Throttle RPM Range	5200-6000 RPM
Fuel Induction System	Electronic Fuel Injection (EFI)
Gear Ratio	1.75:1
Starting	Electric
Shaft Length	20 in, 25 in, 30 in
Warranty	3-Year Limited Warranty
Engine Type	V8
Fuel Type	87 Octane
Bore x Stroke	92 mm x 86 mm