General Specifications
HP / kW
40 HP / 29.8 kW
Displacement
698 cc (42.6 cu in.)
Cylinders
3 (Inline)
WOT RPM
4500 - 5500
Weight
75 kg / 165 lbs
Drive & Lower Unit
Gear Ratio
1.85
Shaft Length
15", 20"
Electrical System
Alternator Output 144 Watts
Starting System Manual/Electric
Technical Maintenance Toolkit
Verified service specifications for the Yamaha 40hp (2-Stroke) (2000)
Lubrication
Engine Oil
Yamalube 2-M
Gearcase Lube 430 ml
Ignition System
Spark Plug
NGK BR8HS-10
Gap Setting 0.039"
Firing Order 1-2-3-4
Performance Specs
Idle RPM 700 ± 50
WOT Range 4500-5500
Alternator 144W
Standard Maintenance Intervals
20H Break-in Service
100H Annual Tune-up
300H Water Pump & Seals
Identification
The serial number for the Yamaha 40hp (2-Stroke) is typically found on a plate located on the transom bracket.
Technical Toolkit
Maintenance Compatibility
These models share common service parts with the Yamaha 40hp (2-Stroke):
Category Discovery
Reference Data
Information compiled from Yamaha Marine factory service manuals and original sales literature published in 2000.