General Specifications
HP / kW
40 HP / 29.8 kW
Displacement
935 cc (57.1 cu in.)
Cylinders
4 (Inline)
WOT RPM
5000 - 6000
Weight
98 kg / 216 lbs
Drive & Lower Unit
Gear Ratio
2.00:1
Shaft Length
20"
Electrical System
Alternator Output 216 Watts
Starting System Electric
Technical Maintenance Toolkit
Verified service specifications for the Mercury 40hp (4-Cyl Carb) (2002)
Lubrication
Engine Oil
25W-40 FC-W
Oil Capacity 3 Liters
Gearcase Lube 340 ml
Ignition System
Spark Plug
Champion RA8HC
Gap Setting 0.040"
Firing Order 1-2-3-4
Performance Specs
Idle RPM 700 ± 50
WOT Range 5000-6000
Alternator 216W
Standard Maintenance Intervals
20H Break-in Service
100H Annual Tune-up
300H Water Pump & Seals
Identification
The serial number for the Mercury 40hp (4-Cyl Carb) is typically found on a plate located on the transom bracket.
Technical Toolkit
Maintenance Compatibility
These models share common service parts with the Mercury 40hp (4-Cyl Carb):
Model Evolution
History of the Mercury 40HP series over the years:
Category Discovery
Reference Data
Information compiled from Mercury Marine factory service manuals and original sales literature published in 2002.