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Yamaha F25CMH - User Manual

Yamaha F25CMH
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Table of Contents

Questions and Answers

  • L
    Lauren WeberAug 18, 2025
    What to do if Yamaha F25CMH fuel management gauge shows incorrect fuel consumption?
    • J
      Jason CoxAug 18, 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.
  • C
    Cindy GrimesAug 20, 2025
    What to do if the Yamaha Outboard Motor gauge display does not wake up?
    • C
      Caroline DelgadoAug 20, 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.
  • S
    Samantha WilliamsAug 23, 2025
    Why Yamaha F25CMH Outboard Motor illumination does not light?
    • R
      Ryan WhitakerAug 23, 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.
  • N
    Nicole TuckerAug 26, 2025
    How to fix Yamaha F25CMH tachometer showing incorrect engine RPM?
    • M
      montoyajennaAug 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
    aimeeedwardsAug 27, 2025
    What causes Yamaha F25CMH Outboard Motor fuel management gauge to show incorrect remaining fuel?
    • M
      Melissa ThompsonAug 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.
  • K
    Kurt RussoAug 30, 2025
    What to do if Yamaha F25CMH gauge shows “----”?
    • U
      uberryAug 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.
  • N
    ndavisSep 1, 2025
    Why Yamaha F25CMH Speedometer or Comb. Speedometer & Fuel mgt gauge shows incorrect fuel level?
    • L
      Lisa GarciaSep 1, 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.
  • A
    Andrew MosesSep 3, 2025
    How to fix Yamaha Outboard Motor trim gauge showing incorrect position?
    • J
      johnsonkristenSep 3, 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.
  • X
    xmarksSep 5, 2025
    Why Yamaha F25CMH gauge operates unstably?
    • K
      Katie GeorgeSep 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.
  • B
    Bethany DudleySep 8, 2025
    What causes Yamaha Outboard Motor gauge response to be poor or down?
    • M
      Matthew AriasSep 8, 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

Installation

Uncrating Procedure (For Typical Steel Frame)

Step-by-step guide for safely removing the outboard motor from its steel frame packaging.

Mounting the Outboard Motor

Details on correctly positioning and mounting the outboard motor onto the boat transom.

Outboard Motor Dimensions

Table defining various dimensions (L, H, W, A, T) for outboard motor overall measurements.

Propellers

Propeller Selection

Guidelines for choosing the right propeller pitch for optimal engine speed and operating load.

2009 Propeller Applications

Tables listing propeller applications by horsepower range and model for 2009 Yamaha outboard motors.

Remote Controls

Remote Control Applications

Information on Yamaha's throttle control systems (Push To Open/Pull To Open) and applicable models.

Remote Control Cables

Guidance on selecting the correct remote control cable length and routing for optimal operation.

Tiller Handles

6 X4 Multi-Function Tiller Handle

Overview of Yamaha's multi-function tiller handle kits and their integrated electrical functions.

Conventional Gauge (6 Y5 & 6 Y7)

Mounting the Meters

Procedure for installing gauges, including selecting location, making holes, and connecting wiring harnesses.

Analog Tachometer

Essential instrument for monitoring engine speed, with applications and dimensions provided.

Digital Tachometer

Digital tachometer features including elapsed hour meter, trim meter, and oil warning indicator.

Speedometer

Instrument measuring boat speed via water impact force, with calibration options and applications.

Fuel Management Gauge

Multi-function gauge for fuel flow, consumption, economy, and RPM synchronization.

Digital Network Gauge (6 Y8)

Digital Network Gauge Dimensions

Provides dimensions for Square Style gauges (surface and flush mount) and Round Style gauges.

Wiring Diagrams

Wiring diagrams for single, twin, and triple engine setups with digital network gauges.

Initial Gauge Setup

Procedure for initial setup of digital network gauges, especially for multi-engine installations.

Troubleshooting

Common troubleshooting table for digital network gauge system issues, including causes, measures, and notes.

Battery

Recommended Battery

Guidance on selecting the correct battery type and capacity, avoiding maintenance-free and gel cell types.

Battery Wiring

Instructions for battery wiring, including isolator-equipped models, single/twin battery setups, and isolated charging cables.

Appendix

Pre-Delivery Inspection (PDI) Checks

Pre-delivery inspection checklist for outboard motors, covering static and dynamic checks for customer satisfaction.

Yamaha F25CMH Specifications

General IconGeneral
Full Throttle RPM Range5000 - 6000 RPM
Starting SystemElectric
Gear Ratio2.08:1
Gear ShiftF-N-R
Trim MethodPower trim and tilt
Engine Type4-stroke
Displacement432 cc
Max Output25 hp
Fuel Induction SystemElectronic Fuel Injection
Recommended FuelRegular Unleaded
Oil Pan Capacity1.1 L
Ignition SystemTCI
Alternator Output12V - 16A
ExhaustThrough propeller
Fuel Tank Capacity25 L
SteeringTiller or Remote
Warranty3 years

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