General Specifications
HP / kW
40 HP / 29.8 kW
Displacement
669 cc (40.8 cu in.)
Cylinders
2 (Inline)
WOT RPM
4500 - 5500
Weight
68 kg / 150 lbs
Drive & Lower Unit
Gear Ratio
1.85
Shaft Length
15", 20"
Electrical System
Alternator Output 126 Watts
Starting System Manual
Technical Maintenance Toolkit
Verified service specifications for the Mariner 40hp International (Yamaha-built 6E9) (1990)
Lubrication
Engine Oil
TC-W3 2-Stroke
Gearcase Lube 440 ml
Ignition System
Spark Plug
NGK B8HS
Firing Order 1-2-3-4
Performance Specs
Idle RPM 700 ± 50
WOT Range 4500-5500
Alternator 126W
Standard Maintenance Intervals
20H Break-in Service
100H Annual Tune-up
300H Water Pump & Seals
Identification
The serial number for the Mariner 40hp International (Yamaha-built 6E9) is typically found on a plate located on the transom bracket.
Technical Toolkit
Maintenance Compatibility
These models share common service parts with the Mariner 40hp International (Yamaha-built 6E9):
Model Evolution
History of the Mariner 40HP series over the years:
Category Discovery
Reference Data
Information compiled from Mariner Marine factory service manuals and original sales literature published in 1990.