General Specifications
HP / kW
115 HP / 85.7 kW
Displacement
1635 cc (99.8 cu in.)
Cylinders
6 (Inline)
WOT RPM
5000 - 5500
Weight
140 kg / 309 lbs
Drive & Lower Unit
Gear Ratio
2.00:1
Shaft Length
20
Electrical System
Alternator Output 192 Watts
Starting System Electric
Technical Maintenance Toolkit
Verified service specifications for the Mercury 115hp Tower of Power (Inline 6) (1985)
Lubrication
Engine Oil
0 50:1 Pre-mix
Gearcase Lube 710 ml
Ignition System
Spark Plug
NGK BUHW
Gap Setting 0.040"
Firing Order 1-2-3-4
Performance Specs
Idle RPM 700 ± 50
WOT Range 5000-5500
Alternator 192W
Standard Maintenance Intervals
20H Break-in Service
100H Annual Tune-up
300H Water Pump & Seals
Identification
The serial number for the Mercury 115hp Tower of Power (Inline 6) is typically found on a plate located on the transom bracket.
Technical Toolkit
Maintenance Compatibility
These models share common service parts with the Mercury 115hp Tower of Power (Inline 6):
Model Evolution
History of the Mercury 115HP series over the years:
Category Discovery
Reference Data
Information compiled from Mercury Marine factory service manuals and original sales literature published in 1985.