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Yamaha Outboard 3A Parts Catalogue
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🏷️ Basic Information Identification Make: Yamaha Model: 3AMH'04 Model Code: 6L53 Serial Number Prefix: 6L5K Production Year: 2004 Model Variant: 3A series (3 hp single-cylinder outboard) Production Years Covered: 2004...
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Typ: Engine
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Art.-Nr: 45176
Stichworte:
3A
Engine
Marine
Sterndrive
Yamaha
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🏷️ Basic Information
Identification
Make:
Yamaha
Model:
3AMH'04
Model Code:
6L53
Serial Number Prefix:
6L5K
Production Year:
2004
Model Variant:
3A series (3 hp single-cylinder outboard)
Production Years Covered:
2004 model year (3A series produced from the 1980s through the mid-2000s)
Market:
International / general export
👋 Introduction
Overview
Target Audience:
Yamaha dealers, marine technicians, and DIY outboard owners servicing the 3A 3 hp portable outboard
Purpose:
Factory parts identification and ordering reference for the 3AMH'04 (model code 6L53)
Position in Range:
Entry-level portable outboard for tenders, dinghies, and small utility craft
Competitive Advantage:
Lightweight single-cylinder design, simple 2-stroke architecture, low parts count and easy field serviceability
Key Features
Engine:
49 cc air-cooled 2-stroke, single cylinder
Output:
3 hp
Starting:
Manual recoil starter
Steering:
Tiller handle with twist-grip throttle
Mounting:
Integral fuel tank on top of cowling; clamp bracket transom mount
Cooling:
Air cooled - no water pump or impeller to service
📋 Manual Details
Document
Manual Type:
Parts Catalogue
Language:
English
Format:
PDF
Delivery:
Instant download
Binding:
Digital (no physical binding)
Printability:
Printable
Compatibility:
All versions of Windows and Mac
Requirement:
Adobe PDF Reader
Coverage
Model Covered:
Yamaha 3AMH'04 (2004)
Model Code:
6L53
Content Type:
Exploded parts diagrams with part numbers and quantities
Page Count:
Varies by edition - N/A - not specified for this listing
📖 Manual Coverage
Systems Covered
Cowling and Fuel:
Covered - cowling, integral fuel tank, fuel cock and lines
Cylinder and Crankcase:
Covered - cylinder, piston, crankshaft, crankcase, gaskets
Intake:
Covered - carburetor, intake manifold, reed valve
Starter:
Covered - recoil starter assembly and rope
Generator:
Covered where fitted on the model
Electrical:
Covered - ignition coil, CDI, wiring, switches, stop circuit
Control:
Covered - tiller handle, throttle linkage, twist grip, shift lever
Upper Casing and Bracket:
Covered - drive shaft housing, swivel bracket, clamp bracket, tilt lock
Lower Casing and Drive:
Covered - gearcase, propeller shaft, gears, propeller, seals
Repair Kit:
Covered - listed service and gasket kits
Numerical Index:
Covered - part number lookup index
Procedure and Depth
Diagram Style:
Exploded views keyed to part numbers and ref numbers per assembly
Part Numbers:
Full Yamaha part numbers with required quantities per assembly
Supersessions:
N/A - superseded part notes not included in this edition
Torque Values:
N/A - not included in a parts catalogue
Service Procedures:
N/A - this is a parts reference, not a repair manual
📊 Manual Specifications
File & Compatibility
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 & Binding
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 Specifications
Configuration
Engine Type:
2-stroke
Cylinders:
1
Displacement:
49 cc
Cooling:
Air cooled
Engine Family:
Yamaha 3A / 3 hp portable outboard
Performance
Horsepower:
3 hp
Rated Output:
3 hp at approximately 4500-5000 rpm
Fuel System:
Carburetor
Fuel Tank:
Integral tank in the top cowling
Starting System:
Manual recoil
🔧 Transmission
Drive
Drive Type:
Outboard
Gear Ratio:
2.00:1
Gearcase:
Forward-neutral with 360-degree pivot reverse
Standard Transmission:
Single-speed forward with mechanical dog clutch; reverse by rotating the engine 180 degrees
Optional Transmission:
N/A - no optional gearcase offered for this model
Features
Shift Control:
Lever on the tiller / lower cowling
Lubrication:
Gear oil bath in the lower unit
Propeller:
Small-diameter 3-blade aluminum propeller
Trim and Tilt:
Manual tilt with tilt lock pin
📐 Dimensions
Exterior
Wheelbase:
N/A - outboard engine, not a land vehicle
Length:
N/A - overall dimensions not stated in this parts catalogue
Shaft Length:
Short shaft (15 in) for the MH variant
Steering:
Tiller
Weights
Curb Weight:
N/A - dry weight not listed in this parts catalogue
Weight Class:
Portable - single-person lift
Transom Mounting:
Clamp bracket, adjustable for transom thickness
Fluids
Gear Oil Capacity:
N/A - not specified for this model
Fuel Tank Capacity:
N/A - not listed in this catalogue
🛡️ Safety Features
Controls
Stop Switch:
Engine stop / kill switch with lanyard provision
Throttle Control:
Twist-grip with friction adjustment
Operation
Tilt Lock:
Tilt lock lever to hold the engine up in shallow water or when beached
Cowling Latch:
Locking top cowling to prevent accidental removal
Propeller Guard:
Anti-ventilation plate and skeg on the lower unit
Ratings
Crash Test Information:
N/A - not applicable to marine outboards
Certification:
N/A - emissions certification details not stated in this parts catalogue
💡 Technology Features
Ignition and Electrical
Ignition:
CDI magneto ignition
Charging:
N/A - no charging coil specified for this model
Wiring:
Simple harness with stop circuit and tiller-mounted controls
Operator Features
Infotainment / Audio:
N/A - not fitted to this outboard
Driver Assistance:
N/A - not applicable to a 3 hp portable outboard
Instrumentation:
N/A - no gauge package on this model
🔧 Maintenance
Lubrication
Recommended Oil Type:
Yamalube 2M or equivalent TC-W3
Fuel Mix Ratio:
Pre-mix 2-stroke fuel and oil, typically 100:1 with Yamalube 2M; use 50:1 with other TC-W3 oils
Gear Oil Type:
Yamalube Gear Oil or equivalent
Gear Oil Change Interval:
Fill or drain as required at lower unit service
Service Intervals
Break-In:
N/A - not specified in this parts catalogue
Spark Plug:
Replace periodically; specific plug number listed in the engine section
Anodes:
Inspect and replace zinc anodes when eroded
Water Pump:
N/A - air-cooled engine, no impeller fitted
Common Wear Items
Impeller / Pump:
Not fitted - air cooled
Propeller:
Impact damage to blades; check for dents and bent tips
Lower Unit Seals:
Oil seal and O-ring wear leading to water in the gearcase
Starter Rope:
Recoil rope fraying or breakage
Carburetor:
Varnish and blocked jets from old fuel; clean or rebuild with kit parts
Gaskets and Seals:
Crankcase, cylinder and gearcase gaskets harden with age
Fuel Lines:
Hoses harden and crack; inspect for leaks
📚 Vehicle History
Brand Heritage
Manufacturer:
Yamaha Motor Co., Ltd.
Founded:
1955, outboard production since the 1960s
Reputation:
Widely used in commercial and recreational marine markets
Model Evolution
Series:
3A series portable single-cylinder outboard
Positioning:
Entry-level 3 hp class, smallest of the Yamaha portable range
Production Years:
Model year 2004 covered by this catalogue; 3A family built over a long production run
Production
Production Location:
N/A - plant not stated in this parts catalogue
Model Code:
6L53
Serial Prefix:
6L5K
🏆 Awards & Recognition
Recognition
Model Awards:
N/A - no specific model awards recorded for the 3A series
Brand Recognition:
Yamaha outboards recognised industry-wide for reliability and parts availability
Class Notes:
Trusted 3 hp class engine for dinghies and tenders; known for simple air-cooled design
Endurance Record:
N/A - not applicable to this model