Yamaha F9.9HMH - User Manual

Questions and Answers

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Jeremy PetersAug 18, 2025
What to do if Yamaha F9.9HMH fuel management gauge shows incorrect fuel consumption?
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  Anna RhodesAug 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.
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rreyesAug 20, 2025
What to do if the Yamaha Outboard Motor gauge display does not wake up?
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  Diane CortezAug 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.
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jenniferblanchardAug 23, 2025
Why Yamaha F9.9HMH illumination does not light?
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  Brittany LoweAug 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.
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Brian DaltonAug 26, 2025
How to fix Yamaha Outboard Motor tachometer showing incorrect engine RPM?
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  Christopher LynnAug 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.
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tammy50Aug 27, 2025
What causes Yamaha F9.9HMH fuel management gauge to show incorrect remaining fuel?
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  Ronnie WashingtonAug 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.
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billymartinAug 30, 2025
What to do if Yamaha F9.9HMH gauge shows “----”?
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  billyburnsAug 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.
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Mark YoungSep 1, 2025
Why Yamaha F9.9HMH Speedometer or Comb. Speedometer & Fuel mgt gauge shows incorrect fuel level?
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  dwheelerSep 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.
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Janet HuertaSep 3, 2025
How to fix Yamaha Outboard Motor trim gauge showing incorrect position?
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  showellSep 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.
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Brenda PetersonSep 6, 2025
Why Yamaha F9.9HMH gauge operates unstably?
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  Veronica SmithSep 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.
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williamgoodmanSep 8, 2025
What causes Yamaha F9.9HMH gauge response to be poor or down?
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  Vanessa GillSep 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.