General Specifications
HP / kW
70 HP / 52.1 kW
Displacement
1298 cc (79.2 cu in.)
Cylinders
4 (Inline)
WOT RPM
4500 - 5500
Weight
163 kg / 359 lbs
Drive & Lower Unit
Gear Ratio
2.42:1
Shaft Length
20", 25"
Electrical System
Alternator Output 504 Watts
Starting System Electric
Technical Maintenance Toolkit
Verified service specifications for the Johnson 70hp (4-Stroke) (2004)
Lubrication
Engine Oil
10W-40 FC-W
Oil Capacity 4.8 Liters
Gearcase Lube 1050 ml
Ignition System
Spark Plug
NGK BPR6ES
Gap Setting 0.030"
Firing Order 1-2-3-4
Performance Specs
Idle RPM 700 ± 50
WOT Range 4500-5500
Alternator 504W
Standard Maintenance Intervals
20H Break-in Service
100H Annual Tune-up
300H Water Pump & Seals
Identification
The serial number for the Johnson 70hp (4-Stroke) is typically found on a plate located on the transom bracket.
Technical Toolkit
Maintenance Compatibility
These models share common service parts with the Johnson 70hp (4-Stroke):
Model Evolution
History of the Johnson 70HP series over the years:
Category Discovery
Reference Data
Information compiled from Johnson Marine factory service manuals and original sales literature published in 2004.