General Specifications
HP / kW
55 HP / 41.0 kW
Displacement
967 cc (59.0 cu in.)
Cylinders
2 (Inline-3)
WOT RPM
5000 - 5500
Weight
100 kg / 221 lbs
Drive & Lower Unit
Gear Ratio
1.64
Shaft Length
20
Electrical System
Alternator Output 210 Watts
Starting System Electric
Technical Maintenance Toolkit
Verified service specifications for the Mercury SeaPro 55hp (2005)
Lubrication
Engine Oil
10W-30 FC-W
Gearcase Lube 440 ml
Ignition System
Spark Plug
NGK BP8H-N-10
Gap Setting 1.0mm
Firing Order 1-2-3-4
Performance Specs
Idle RPM 700 ± 50
WOT Range 5000-5500
Alternator 210W
Standard Maintenance Intervals
20H Break-in Service
100H Annual Tune-up
300H Water Pump & Seals
Identification
The serial number for the Mercury SeaPro 55hp is typically found on a plate located on the transom bracket.
Technical Toolkit
Maintenance Compatibility
These models share common service parts with the Mercury SeaPro 55hp:
Model Evolution
History of the Mercury 55HP series over the years:
Standalone production year.
Category Discovery
Reference Data
Information compiled from Mercury Marine factory service manuals and original sales literature published in 2005.