Yamaha 115A - User Manual

Questions and Answers

R
Robert SantiagoAug 9, 2025
How to fix a Yamaha 115A Outboard Motor when the starter won't operate?
- M
  Mrs. Shirley MorganAug 9, 2025
  If your Yamaha Outboard Motor's starter won't operate, here's what to check: * Ensure the engine stop switch lanyard is attached. * Make sure the shift lever is in neutral. * Check the battery condition; a weak or low battery can be the culprit. Use a battery with the recommended capacity. * Inspect battery connections for looseness or corrosion; tighten cables and clean terminals if needed. * Examine the fuse for the electric start circuit; if blown, check for the cause of the overload, repair, and replace the fuse with the correct amperage. * If none of these steps work, the starter components may be faulty, and you should have it serviced by a Yamaha dealer.
M
Mark GomezOct 31, 2025
What to do if Yamaha 115A engine will not start but the starter operates?
- P
  Phillip TapiaOct 31, 2025
  If your Yamaha Outboard Motor engine won't start but the starter operates, consider the following potential causes: 1. The fuel tank may be empty. Refill it with clean, fresh fuel. 2. The fuel might be contaminated or stale. Replace it with clean, fresh fuel. 3. The fuel filter could be clogged. Clean or replace the filter. 4. The spark plugs may be fouled or of the incorrect type. Inspect, clean, or replace them with the recommended type. 5. The spark plug caps might be fitted incorrectly. Check and refit them. 6. There may be poor connections or damaged ignition wiring. Check wires for wear or breaks, tighten loose connections, and replace worn or broken wires. 7. Ensure the engine stop switch lanyard is attached and the shift lever is in neutral. If these steps don't resolve the...
J
Jeremy SmithNov 19, 2025
Why does my Yamaha Outboard Motor engine idle irregularly or stall?
- C
  Christina KingNov 19, 2025
  If your Yamaha Outboard Motor engine idles irregularly or stalls, here's what might be happening: * The spark plugs could be fouled or of the incorrect type. Inspect, clean, or replace them with the recommended type. * There might be an obstruction in the fuel system, such as a pinched or kinked fuel line. Check for and clear any obstructions. * The fuel could be contaminated or stale. Replace it with clean, fresh fuel. * The fuel filter may be clogged. Clean or replace it. * Poor connections or damaged ignition wiring can cause issues. Check the wires for wear or breaks, tighten any loose connections, and replace worn or broken wires. * The air vent screw on the fuel tank may be closed. Open the air vent screw. * The choke knob may be pulled out. Return it to the home posit...

Summary

General Information

Identification Numbers Record

Record of outboard motor serial and key numbers for reference and identification.

Safety Information

Crucial safety guidelines and precautions for operating the outboard motor.

Basic Boating Rules

Fueling Instructions

Procedures and safety precautions for refueling the outboard motor with gasoline and oil.

Basic Components

Operations of Controls and Other Functions

Explanation of how to use various controls like remote control, switches, and meters.

Warning System

Operation

Installation

Starting Engine

Step-by-step guide for starting the outboard motor, including pre-start checks.

Shifting

How to safely shift between forward, neutral, and reverse gears using the control lever.

Trimming Outboard Motor

Maintenance

Specification Data

Maintenance Chart

Recommended maintenance intervals and tasks for ensuring optimal engine performance and longevity.

Trouble Recovery

Troubleshooting

Chart of common outboard motor problems, their possible causes, and recommended remedies.

Temporary Action in Emergency

Treatment of Submerged Motor

Yamaha 115A Specifications

General

Horsepower	115 hp
Cylinders	4
Gear Ratio	2.15:1
Starting System	Electric
Fuel Induction System	EFI (Electronic Fuel Injection)
Alternator Output	35 Amp
Steering	Remote
Engine Type	4-stroke
Displacement	1832 cc (111.8 ci)
Shaft Length	L = 508 mm (20 in), X = 635 mm (25 in)
Bore x Stroke	81.0 mm x 88.9 mm (3.19 x 3.50 in)