Market Position:
Written for marinas, outboard mechanics and DIY owners servicing the 1987 Yamaha V6 EXCEL H outboard
Competitive Advantage:
Factory-style exploded views and part references in one searchable PDF, no waiting for shipping
Key Feature 1:
Exploded parts diagrams with item numbers
Key Feature 2:
Complete part number lists for ordering
Key Feature 3:
Covers powerhead, midsection and lower unit assemblies
Key Feature 4:
Printable pages for shop use
Powerhead Assemblies:
Cylinder block, cylinder head, pistons, crankshaft and crankcase components
Intake and Carburetion:
Carburetor assemblies, intake manifold, reed valves and fuel lines
Ignition and Electrical:
Flywheel, stator, CDI components, coils, wiring harness and starting system
Fuel System:
Fuel pump, fuel filter, primer and fuel tank connections
Cooling System:
Water pump, impeller, thermostat and cooling passages
Exhaust System:
Exhaust housing, inner exhaust plate and related gaskets
Midsection:
Mounting bracket, swivel bracket, tilt and trim components
Lower Unit:
Gearcase housing, gears, driveshaft, propeller shaft and seals
Assembly Diagrams:
Exploded views with item callouts for ordering and reassembly
Part Number Reference:
Full part number lists tied to diagram item numbers
Component Identification:
Named components with part references for correct replacement
Disassembly Reference:
Visual breakdown of assemblies to guide teardown
Reassembly Reference:
Diagram sequence supporting correct reassembly
Diagram Coverage:
Part-level exploded views across major systems
Specifications:
N/A - consult engine service manual for torque and clearance specs
Wiring Diagrams:
Component-level wiring references where applicable
Parts Catalog:
OEM-style part numbers with diagram cross-reference
Ordering Support:
Item numbers map directly to listed part numbers
Supersession:
N/A - check with dealer for current superseded numbers
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:
V6 two-stroke outboard, 90-degree V configuration
Displacement:
N/A - exact displacement not specified for this variant
Horsepower:
N/A - horsepower rating not specified for this variant
Cooling:
Water-cooled with impeller-driven pump
Fuel System:
Carbureted induction
Ignition:
Capacitor discharge ignition (CDI)
Starting System:
Electric start with manual rope backup
Lubrication:
Oil mixed with fuel (premix) unless oil injection equipped
Fuel Type:
Regular unleaded gasoline with two-stroke outboard oil
Standard Transmission:
Forward, neutral and reverse gearcase with dog clutch
Optional Transmission:
N/A - no factory optional transmission for this model
Gear Ratio:
N/A - gear ratio not specified for this variant
Shift Control:
Remote mechanical shift linkage
Propeller Shaft:
Spline-driven propeller shaft in lower unit
Trim and Tilt:
Power trim and tilt system with hydraulic rams
Wheelbase:
N/A - outboard engine, no wheelbase
Length:
N/A - overall length depends on shaft configuration
Shaft Length:
N/A - available in multiple shaft lengths
Curb Weight:
N/A - exact dry weight not specified for this variant
Configuration:
V6 outboard, transom mounted
Steering:
Remote mechanical or hydraulic steering compatible
Crash Test Ratings:
N/A - outboard engine, crash testing does not apply
Emergency Stop:
Engine stop lanyard with kill switch
Overheat Protection:
Overheat warning horn and temperature sensor
Over-Rev Protection:
N/A - over-rev limiter not specified for this model year
Neutral Start:
Start-in-gear prevention via shift interlock
Tilt Lock:
Manual tilt lock lever for trailering and service
Anode Protection:
Sacrificial anodes to control corrosion
Engine and Control Technology
Ignition System:
Capacitor discharge ignition (CDI)
Charging System:
Flywheel-driven alternator with rectifier/regulator
Instrumentation:
Compatible with Yamaha tachometer, trim gauge and warning indicators
Audio System:
N/A - outboard engine, no factory audio system
Driver Assistance:
N/A - driver assistance systems do not apply to outboard engines
Trim Control:
Power trim and tilt with dash or binnacle switch
Break-In Service:
First service after initial 10 hours of operation
Gear Oil Change:
Every 100 hours or annually, whichever comes first
Water Pump Impeller:
Inspect annually, replace at least every 100 hours or as needed
Spark Plugs:
Inspect and replace at recommended intervals; gap per engine service manual
Fuel Filter:
Replace at least annually or at interval specified in service manual
Anodes:
Inspect regularly, replace when significantly eroded
Gearcase Oil:
Hypoid gear lubricant, quantity per service manual
Fuel Mix:
Two-stroke outboard oil at the ratio specified for the model
Lower Unit Seals:
Inspect for water intrusion and fishing line damage each season
Common Wear Items:
Impeller, spark plugs, anodes, thermostats, gaskets, seals and water pump housing
Brand and Model Background
Manufacturer:
Yamaha Motor Company
Brand Heritage:
Yamaha has produced marine outboard engines since the 1960s
Model Evolution:
V6 EXCEL H part of Yamaha's 1980s V6 outboard lineup
Production Location:
N/A - specific plant not documented in source description
Class:
V6 two-stroke outboard engine
