1987 Evinrude 100hp Manual

The 1987 Evinrude 100hp outboard motor is a V4, two-stroke marine engine featuring 99.6 cubic inch displacement, loop charging system, 120:1 fuel/oil ratio, thermostatically controlled cooling, CD ignition system, and electric starting. This manual covers operation, maintenance, troubleshooting, and specifications for the 1987 model year E100STLECM and E100TLECM models. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation 3. Operation 4. Specifications 5. Controls and Settings 6. Fuel System 7. Electrical System 9. Maintenance Schedule 10. Storage & Winterization 11. Regulatory Information 12. Troubleshooting

Features at a Glance

Key components: V4 two-stroke engine, CD ignition, electric start, thermostatic cooling, built-in fuel pump, power trim/tilt.

Feature	Description
Displacement	99.6 cubic inches (1632cc)
Bore x Stroke	3.50" x 2.60" (88.9mm x 66mm)
Fuel/Oil Ratio	120:1 with Evinrude/Johnson oil
Ignition System	CD with electronic timing
Starting System	Electric with solenoid
Cooling System	Thermostatically controlled water pump
Gear Ratio	1.85:1
Full Throttle RPM	4500-5500 RPM
Weight	Approx. 305 lbs (138 kg)
Carburetion	Dual-barrel down-draft carburetor

Installation

Proper installation ensures optimal performance and safety.

Mounting: Use correct transom height; ensure mounting bolts are torqued to 55-60 ft-lbs.
Steering connection: Attache steering cable or hydraulic system according to manufacturer instructions.
Electrical connections: Connect battery cables (red to positive, black to negative).
Control box installation: Mount remote control within easy reach of operator.
Fuel system: Connect fuel line with quick-connect fitting; prime system.

WARNING! Engine is heavy; use proper lifting equipment. Ensure all connections are secure before operation.

Operation

Starting and operating procedures for normal conditions.

Pre-start check: Verify fuel level, oil level, battery charge, and cooling water intake.
Starting procedure: Turn key to ON, push in key for choke (cold start), turn to START.
Warm-up: Allow engine to idle for 2-3 minutes before applying throttle.
Shifting: Pause in neutral position when shifting between forward and reverse.
Shutdown: Allow engine to idle for 30 seconds before turning off.

CAUTION! Always operate in well-ventilated area. Carbon monoxide poisoning can occur in enclosed spaces.

Specifications

Model Numbers: E100STLECM, E100TLECM
Horsepower: 100 hp @ 5000 RPM
Full Throttle Range: 4500-5500 RPM
Fuel Consumption: Approx. 10.5 gph at WOT
Oil Capacity: 3.5 quarts (3.3 liters)
Spark Plugs: Champion QL77JC4 or equivalent, gap 0.030"
Alternator Output: 16 amps @ 5000 RPM
Propeller Selection: 13" x 17" aluminum standard
WOT RPM Range: 4500-5500 RPM

Controls and Settings

Remote control box features: Key switch, choke, throttle, shift lever, trim/tilt switches.

Engine Controls: Throttle friction adjustment, shift cable adjustment, trim limit adjustment.

Ignition: CD system with power pack, trigger assembly, stator. Timing: Fixed at 4° BTDC idle, 18° BTDC WOT. Carburetor: Main jet #58D, idle jet #36. Thermostat: Opens at 143°F (62°C).

Fuel System

Fuel pump: Diaphragm type, engine pulse operated. Carburetor: Dual-barrel with fixed main jets.

Fuel mixture: 120:1 ratio with Evinrude/Johnson TC-WII oil.
Fuel filter: Replace annually or every 100 hours.
Carburetor adjustment: Initial setting 1-1/2 turns out from lightly seated.
Fuel line inspection: Check for cracks or deterioration annually.

Tip: Use fresh fuel and proper oil mixture to prevent engine damage.

Electrical System

12-volt negative ground system with 16 amp alternator.

Battery: Minimum 450 CCA marine starting battery.
Ignition: CD system with power pack, stator, trigger assembly.
Charging system: 16 amp output for battery maintenance.
Wiring: Color-coded harness with waterproof connectors.

WARNING! Disconnect battery before servicing electrical components. Avoid short circuits.

Maintenance Schedule

Regular maintenance ensures long engine life and reliable operation.

Every 100 hours/annually: Replace spark plugs, water pump impeller, fuel filter.
Every 200 hours: Check and clean carburetors, test compression.
Every 300 hours: Replace thermostat, inspect exhaust system.
Annual: Change gear lube, inspect and lubricate steering system.
Storage: Fog engine, stabilize fuel, protect from corrosion.

WARNING! Always disconnect spark plug wires when working on engine to prevent accidental starting.

Storage & Winterization

Proper storage prevents damage during off-season.

Flush cooling system with fresh water. Add fuel stabilizer and run engine for 10 minutes. Fog cylinders through spark plug holes. Drain fuel from carburetor. Change gear lube. Grease all fittings. Store in vertical position.

CAUTION! Do not store with fuel in carburetor bowls. Use proper antifreeze if freezing temperatures expected.

Regulatory Information

EPA certified for 1987 model year. Meets marine engine emission standards. Manufactured by Outboard Marine Corporation. Copyright © 1987 Evinrude Motors. For technical support, contact Evinrude Customer Service at 1-414-535-5500 or your local authorized Evinrude dealer.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel, spark, or compression	Check fuel supply, spark plugs, compression; verify choke operation.
Poor idle	Carburetor adjustment	Adjust idle mixture screws; clean carburetor; check for air leaks.
Overheating	Water pump/thermostat	Replace water pump impeller; test thermostat; check water intake.
No spark	Ignition components	Test stator, power pack, trigger assembly; check kill switch.
Fuel starvation	Fuel system issues	Check fuel pump, lines, filter; verify tank venting.

Compression Check: Should be 100-120 psi, within 10% cylinder to cylinder.

Service: Contact authorized Evinrude dealer for major repairs.