Market Position:
Entry-level portable outboard for small craft, tenders, and auxiliary sailboat power.
Target Audience:
DIY owners and technicians performing parts identification, disassembly, repair, and assembly.
Competitive Advantage:
Yamaha 2-stroke reliability and parts support; this manual provides exploded diagrams with part numbers for accurate ordering.
Key Features:
Illustrated exploded views, part numbers listed, covers 4 HP and 5 HP variants.
Purpose:
Part lookup, disassembly, repair, and assembly.
Powerhead Components:
Cylinder, piston, crankshaft, connecting rod, bearings, seals, gaskets.
Fuel System:
Carburetor, fuel pump, fuel lines, filters, tank components.
Ignition System:
CDI unit, ignition coil, spark plug, flywheel, stator.
Electrical System:
Wiring harness, switches, starter motor (if equipped), charging coil.
Cooling System:
Water pump, impeller, thermostat, cooling passages.
Lower Unit:
Gearcase, propeller, driveshaft, gears, clutch dog, water pump housing.
Mid-Section:
Exhaust housing, mounts, swivel bracket, steering components.
Tiller Handle:
Throttle grip, shift lever, tiller arm, bushings.
Bracket and Tilt System:
Transom brackets, tilt lock, trim components (if applicable).
Cowl and Covers:
Top cowling, lower cowling, decals, fasteners.
Disassembly:
Step-by-step exploded views for removing components.
Repair:
Component replacement and repair procedures with part numbers.
Assembly:
Reassembly order and torque references where applicable.
Parts Identification:
Illustrations with part numbers for ordering.
Detail Level:
OEM-level exploded diagrams with part numbers.
Parts Information:
Part numbers listed; no pricing or availability.
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Engine Type:
2-stroke, single cylinder
Bore x Stroke:
52mm x 43mm (4MHV) / 56mm x 43mm (5MHV)
Displacement:
93 cc (4MHV) / 106 cc (5MHV)
Horsepower:
4 HP (4MHV) / 5 HP (5MHV)
Cooling System:
Water-cooled
Lubrication System:
Pre-mix
Fuel Type:
Unleaded Gasoline
Fuel Mixture Ratio:
50:1 (gasoline:2-stroke oil)
Standard Transmission:
Manual shift, forward-neutral-reverse
Optional Transmission:
N/A - not offered for this model
Gear Ratio:
Likely 1.85:1 or similar for this HP range
Features:
Tiller-mounted shift lever, dog clutch engagement.
Break-In Service:
N/A - not specified
Regular Service:
N/A - not specified
Fuel Type:
Unleaded Gasoline
Fuel Mixture Ratio:
50:1 (Gasoline:2-stroke Oil)
Gear Oil Type:
Yamaha Outboard Gear Oil or equivalent
Gear Oil Capacity:
Approx. 70-80 ml
Common Wear Items:
Water pump impeller, spark plug, propeller, anodes, fuel lines.
