General Specifications
HP / kW
7.5 HP / 5.6 kW
Displacement
164 cc (10.0 cu in.)
Cylinders
2 (Inline-2)
WOT RPM
4000 - 4500
Weight
26 kg / 57 lbs
Drive & Lower Unit
Gear Ratio
1.65
Shaft Length
15" Short, 20" Long
Electrical System
Alternator Output None / Magneto Only
Starting System Manual (Recoil)
Technical Maintenance Toolkit
Verified service specifications for the McCulloch 7.5hp Scott-Built (1964)
Lubrication
Engine Oil
10W-30 FC-W
Gearcase Lube 150 ml
Ignition System
Spark Plug
Champion J6C
Firing Order 1-2-3-4
Performance Specs
Idle RPM 700 ± 50
WOT Range 4000-4500
Alternator None
Standard Maintenance Intervals
20H Break-in Service
100H Annual Tune-up
300H Water Pump & Seals
Identification
The serial number for the McCulloch 7.5hp Scott-Built is typically found on a plate located on the transom bracket.
Technical Toolkit
Maintenance Compatibility
These models share common service parts with the McCulloch 7.5hp Scott-Built:
Model Evolution
History of the McCulloch 7.5HP series over the years:
Standalone production year.
Category Discovery
Reference Data
Information compiled from McCulloch Marine factory service manuals and original sales literature published in 1964.