1986 Four Winns 190 Horizon Service Manual

The 1986 Four Winns 190 Horizon is a 19-foot bowrider pleasure boat featuring a fiberglass hull, various engine options including OMC and Volvo Penta stern drives, comprehensive electrical systems, steering controls, fuel system, and marine accessories. This service manual provides detailed information for maintenance, troubleshooting, and repair procedures. Below are key sections covering specifications, maintenance schedules, engine systems, electrical systems, hull maintenance, and troubleshooting.

1. Specifications 2. Maintenance Schedule 3. Engine Systems 4. Electrical Systems 5. Fuel System 6. Steering & Controls 7. Hull & Deck Maintenance 8. Trailer Information 9. Winterization & Storage 10. Troubleshooting

Specifications

Key specifications for the 1986 Four Winns 190 Horizon model.

Feature	Description
Length Overall	19 feet 2 inches
Beam	7 feet 6 inches
Weight (approx.)	2,350 lbs (with engine)
Maximum Capacity	8 persons or 1,450 lbs
Fuel Capacity	28 gallons
Engine Options	OMC 140/170/190 HP, Volvo Penta AQ131/AQ171
Hull Material	Fiberglass with flotation foam
Drive System	Stern Drive (OMC Stringer/Volvo 280)
Steering	Mechanical or hydraulic steering system
Electrical	12V DC system with marine battery

Maintenance Schedule

Regular maintenance procedures and intervals for optimal performance.

Engine oil change: Every 100 hours or annually
Gear lube change: Every 100 hours or annually
Spark plug replacement: Every 100 hours or annually
Fuel filter replacement: Every 100 hours or annually
Impeller replacement: Every 2 years or 300 hours
Belt tension check: Every 50 hours
Anode inspection: Every 50 hours in salt water
Steering system lubrication: Every 100 hours

WARNING! Always disconnect battery before performing electrical maintenance. Use marine-grade parts only.

Engine Systems

Detailed information about engine maintenance and service procedures.

Engine alignment: Check and adjust every 100 hours
Cooling system: Flush after salt water use; check hoses for cracks
Ignition system: Check timing and advance mechanisms
Carburetor adjustment: Set idle mixture and speed according to specs
Compression test: Perform annually or if performance issues occur
Exhaust system: Inspect for leaks and corrosion

CAUTION! Engine components can be hot during operation. Allow cooling before servicing.

Electrical Systems

Battery: Group 24 or 27 marine battery, 12V DC
Wiring: Color-coded marine-grade tinned copper
Fuses/Circuit Breakers: Panel mounted with spare fuses
Navigation Lights:

Bow red/green and stern white lights
Bilge Pump: Automatic and manual operation

Instrumentation: Speedometer, tachometer, fuel gauge, temperature gauge

Switches: Ignition, blower, navigation lights, bilge pump

Fuel System

Fuel system components and maintenance procedures.

Components: 28-gallon aluminum tank, anti-siphon valve, fuel/water separator, fuel lines, vent system.

Maintenance: Inspect fuel lines for cracks annually. Replace fuel/water separator element every 100 hours. Check tank for corrosion every 2 years. Ensure proper venting to prevent vapor lock.

Steering & Controls

Steering system and control cable maintenance.

Steering cable lubrication: Every 100 hours

Control cable adjustment: Check for smooth operation

Shift and throttle linkage: Lubricate and adjust as needed

Steering wheel: Check for play and tighten if necessary

Tip: Always test steering and controls on land before launching.

Hull & Deck Maintenance

Fiberglass hull and deck care procedures.

Cleaning: Use marine-grade cleaners; avoid abrasive materials

Gelcoat repair: Use matching gelcoat paste for scratches

Bottom painting: Apply anti-fouling paint if kept in water

Upholstery care: Clean with marine vinyl cleaner; protect from UV

Hardware inspection: Check cleats, rails, and fittings for corrosion

Drain plugs: Inspect and replace if worn; ensure proper seating

WARNING! Use proper ventilation when working with fiberglass and chemicals.

Trailer Information

Trailer specifications and maintenance for proper boat transport.

Winterization & Storage

Proper procedures for winterizing and storing the boat.

Drain all water from engine and systems. Add antifreeze to engine block and freshwater system. Fog engine cylinders. Remove battery and store on charger. Clean and wax hull. Cover with breathable cover. Store in dry, ventilated area.

CAUTION! Failure to properly winterize can cause freeze damage to engine and systems.

Troubleshooting

Symptom Possible Cause Corrective Action

Engine won't start Dead battery, fuel issue, ignition problem Check battery voltage; verify fuel flow; inspect spark plugs

Overheating Blocked water intake, impeller failure Check intake for debris; replace impeller if worn

Poor performance Fouled plugs, fuel contamination Replace spark plugs; drain and replace fuel

Electrical failure Corroded connections, blown fuses Clean battery terminals; check and replace fuses

Steering stiffness Cable lubrication, alignment issues Lubricate steering cable; check engine alignment

Service: Contact authorized Four Winns dealer for complex repairs

Parts: Use genuine Four Winns replacement parts for optimal performance

1986 Four Winns 190 Horizon Service Manual © - All Rights Reserved 2025

Symptom	Possible Cause	Corrective Action
Engine won't start	Dead battery, fuel issue, ignition problem	Check battery voltage; verify fuel flow; inspect spark plugs
Overheating	Blocked water intake, impeller failure	Check intake for debris; replace impeller if worn
Poor performance	Fouled plugs, fuel contamination	Replace spark plugs; drain and replace fuel
Electrical failure	Corroded connections, blown fuses	Clean battery terminals; check and replace fuses
Steering stiffness	Cable lubrication, alignment issues	Lubricate steering cable; check engine alignment