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Yamaha F20AET - User Manual

Yamaha F20AET
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Table of Contents

Questions and Answers

  • A
    Amy JonesAug 19, 2025
    What to do if Yamaha Outboard Motor fuel management gauge shows incorrect fuel consumption?
    • W
      williamsbrianAug 19, 2025
      If the fuel management gauge shows incorrect fuel consumption, the engine recognition might be wrong (especially for multi-applications). To fix this, default the engine number and turn the key switch on in order from the portside engine to re-memorize each engine number.
  • E
    Elizabeth HubbardAug 21, 2025
    What to do if the Yamaha F20AET Outboard Motor gauge display does not wake up?
    • M
      Mark ShawAug 21, 2025
      If the gauge display doesn't wake up, it could be due to a lack of electrical power or a damaged gauge. Try these steps: replace the fuse, securely connect the couplers, replace any damaged wires or hubs, or, if necessary, replace the gauge itself.
  • A
    Alison BeasleyAug 23, 2025
    Why Yamaha Outboard Motor illumination does not light?
    • R
      Randy AvilaAug 25, 2025
      If the illumination does not light, it could be due to a lack of electrical power or a damaged gauge. You should try replacing the fuse, connecting the couplers securely, replacing the damaged wire or hub, or replacing the gauge.
  • C
    Curtis NealAug 26, 2025
    How to fix Yamaha F20AET Outboard Motor tachometer showing incorrect engine RPM?
    • B
      brady71Aug 26, 2025
      If the tachometer shows an incorrect engine RPM, the engine recognition might be wrong (especially for multi-applications). To correct this, push the 'SET' button for 10 seconds to default the engine number, then memorize each engine number again.
  • A
    Albert HollowayAug 28, 2025
    What causes Yamaha F20AET Outboard Motor fuel management gauge to show incorrect remaining fuel?
    • K
      Karen BriggsAug 28, 2025
      If the fuel management gauge shows incorrect remaining fuel, the fuel capacity setting may be wrong (specifically for SQR Fuel mgt Gauge). Fill the tank with fuel, and set the correct fuel tank capacity.
  • J
    James SandersAug 30, 2025
    What to do if Yamaha F20AET gauge shows “----”?
    • E
      Erica LamAug 30, 2025
      If the gauge displays '----', it indicates that the digital signal is not being received. Check that the couplers are securely connected and replace any damaged bus wires or hubs.
  • K
    kelleydylanSep 2, 2025
    Why Yamaha F20AET Outboard Motor Speedometer or Comb. Speedometer & Fuel mgt gauge shows incorrect fuel level?
    • J
      julie30Sep 2, 2025
      If the speedometer or combination speedometer & fuel management gauge shows an incorrect fuel level, the fuel sensor selection is likely wrong. Set up the fuel sensor to the correct resistance.
  • W
    williamevansSep 3, 2025
    How to fix Yamaha Outboard Motor trim gauge showing incorrect position?
    • A
      Arthur HernandezSep 4, 2025
      If the trim gauge shows an incorrect position, the initial position setting might be wrong, or the trim sender could be damaged. Put the motor in the fully trimmed-in position and reset the initial (zero) trim angle. If that doesn't work, replace the trim sender.
  • M
    Matthew EvansSep 6, 2025
    Why Yamaha F20AET gauge operates unstably?
    • A
      abigail70Sep 6, 2025
      If the gauge operates unstably, it could be because a resistor is not connected to the ending hubs. Connect the gray 6-pin cap to the ending multi-hubs.
  • T
    thomasparkerSep 9, 2025
    What causes Yamaha Outboard Motor gauge response to be poor or down?
    • Z
      zsmithSep 9, 2025
      If the gauge response is poor or down, a market obtainable unit connected to the system may have failed, or the signal volume has exceeded 50% of the capacity. Try replacing the unit or removing the heavy signal output unit.

Summary

PREFACE

WARNING

Important safety instructions regarding potential severe injury or death.

INSTALLATION

TOP COVER PICTOGRAPH DESCRIPTION

Explains pictographs for crate handling and product protection.

UNCRATING PROCEDURE (FOR TYPICAL STEEL FRAME)

Step-by-step guide for safely removing the outboard motor from its shipping crate.

MOUNTING THE OUTBOARD MOTOR

Provides guidance on correctly mounting the outboard motor onto the boat's transom.

MOUNTING THE REMOTE OIL TANK

Guidance on installing the remote oil tank for specific engine types.

PROPELLERS

PROPELLER SELECTION

Guidance on selecting the appropriate propeller for optimal engine speed and load.

WOT OPERATION RANGE TABLE

Table showing recommended engine RPM ranges for various models at Wide-Open-Throttle.

REMOTE CONTROLS

REMOTE CONTROL APPLICATIONS

Explains throttle control systems and models using specific connectors.

TILLER HANDLES

6 X4 MULTI-FUNCTION TILLER HANDLE

Introduces multi-function tiller handle kits for various Yamaha engines.

MULTI-FUNCTION TILLER HANDLE KIT (FOR US)

Lists contents for tiller handle kits for US market engines.

MULTI-FUNCTION TILLER HANDLE KIT (FOR JAPAN)

Details the multi-function tiller handle kit for Japanese market engines.

CONVENTIONAL GAUGE (6 Y5 & 6 Y7)

MOUNTING THE METERS

Step-by-step procedure for mounting gauges to the instrument panel.

FUEL MANAGEMENT GAUGE

Details the fuel management gauge, its functions, and applications.

DIGITAL NETWORK GAUGE (6 Y8)

INITIAL GAUGE SETUP

Instructions for initial setup of digital network gauges, especially for multi-engine setups.

TROUBLESHOOTING

Table of common troubleshooting issues and their solutions for the gauge system.

BATTERY

RECOMMENDED BATTERY

Details recommended battery specifications for various Yamaha outboard engines.

BATTERY WIRING

Wiring instructions for battery systems, including isolator equipped models.

APPENDIX

FUEL SYSTEM VACUUM PRESSURE STANDARD

Standard vacuum pressure requirements for the fuel system.

PRE-DELIVERY INSPECTION (PDI) CHECKS

Checklist for pre-delivery inspection of outboard motors.

Yamaha F20AET Specifications

General IconGeneral
BrandYamaha
ModelF20AET
CategoryOutboard Motor
LanguageEnglish

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