General Specifications
HP / kW
90 HP / 67.0 kW
Displacement
1140 cc (69.6 cu in.)
Cylinders
3 (Inline-3)
WOT RPM
4500 - 5500
Weight
118 kg / 260 lbs
Drive & Lower Unit
Gear Ratio
2.0
Shaft Length
20
Electrical System
Alternator Output 120 Watts
Starting System Electric
Technical Maintenance Toolkit
Verified service specifications for the Yamaha 90hp Precision Blend (1998)
Lubrication
Engine Oil
Yamalube 2M
Gearcase Lube 610 ml
Ignition System
Spark Plug
NGK BR8HS-10
Gap Setting 0.040"
Firing Order 1-2-3-4
Performance Specs
Idle RPM 700 ± 50
WOT Range 4500-5500
Alternator 120W
Standard Maintenance Intervals
20H Break-in Service
100H Annual Tune-up
300H Water Pump & Seals
Identification
The serial number for the Yamaha 90hp Precision Blend is typically found on a plate located on the transom bracket.
Technical Toolkit
Maintenance Compatibility
These models share common service parts with the Yamaha 90hp Precision Blend:
Model Evolution
History of the Yamaha 90HP series over the years:
Category Discovery
Reference Data
Information compiled from Yamaha Marine factory service manuals and original sales literature published in 1998.