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deannathompsonSep 6, 2025
How to setup Yamaha 20DMH Outboard Motor tachometer to show the oil pressure?
- JJoseph MathewsSep 6, 2025
Select the oil press. display.
How to setup Yamaha 20DMH Outboard Motor tachometer to show the oil pressure?
Select the oil press. display.
What to do if the Yamaha 20DMH Outboard Motor gauge display does not wake up?
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.
Why Yamaha 20DMH Outboard Motor illumination does not light?
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.
How to fix Yamaha 20DMH Outboard Motor tachometer showing incorrect engine RPM?
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.
What causes Yamaha 20DMH Outboard Motor fuel management gauge to show incorrect remaining fuel?
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.
What to do if Yamaha 20DMH gauge shows “----”?
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.
What to do if my Yamaha Outboard Motor speedometer shows the incorrect fuel level?
If the speedometer shows an incorrect fuel level, the fuel sensor selection is likely wrong. You should set up the fuel sensor to the correct resistance.
What does it mean when my Yamaha 20DMH Outboard Motor gauge shows “----”?
If the gauge shows “----”, it indicates that the digital signal is not being received. Make sure the couplers are securely connected and replace any damaged bus wires or hubs.
Why Yamaha 20DMH boat speed and/or coolant pressure gauge does not show?
If the boat speed and/or coolant pressure gauge does not show, it is likely that the optional sensor has not been installed. Install the optional sensor.
What causes Yamaha 20DMH gauge response to be poor or down?
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.
General| Brand | Yamaha |
|---|---|
| Model | 20DMH |
| Category | Outboard Motor |
| Language | English |
Indicates a hazardous situation that could result in death or serious injury if not avoided.
Step-by-step guide for safely removing the outboard motor from its steel crate.
Guidelines for correctly installing the outboard motor onto the boat transom.
Details on Yamaha propeller types designed for optimal performance with their motors.
Guidance on choosing the appropriate propeller pitch based on operating load and application.
Catalog of standard propellers, their specifications, and applications for 2014 models.
Details on Yamaha's throttle control systems ('Push To Open' vs 'Pull To Open') and connector types.
Provides wiring diagrams and part numbers for digital electronic remote control systems.
Describes the features and electrical functions of the multi-function tiller handle.
Illustrates the electrical connections for the 6X4 multi-function tiller handle in US models.
Procedures for installing gauges, ensuring readability and proper clearance.
Essential gauge for monitoring outboard engine speed and ensuring efficient operation.
Gauge that monitors engine speed, includes hour meter, trim, and oil warning indicators.
Measures boat speed using water impact force, with calibration options for different units.
Provides fuel flow, consumption, economy, and RPM synchronizer functions.
Monitors cooling water passage pressure and warns of cooling system issues.
Details various analog and digital speedometer models and their applicable engines.
Lists models and applications for fuel management gauges, including kit numbers.
Instructions for locating, placing, and connecting the fuel sensor and hoses.
Explains the wiring connections for the fuel management gauge and its interaction with other systems.
Guides setting fuel measurement units, signal inputs, and compensator switches.
Instructions for installing sensors/attachments on 2-stroke engines, including torque specs.
Installation details for sensors/attachments on F25D, FT25F, F30B, F40F engines.
Installation instructions for F115B and F75B/F75A/F80B/F90B/F100D/F75C models.
Shows the wiring diagram for the charge warning unit, including relay and lighting coil.
Explains wire colors and their main usage for Yamaha and ABYC standard systems.
Wiring diagram for single engine application with digital meters.
Wiring diagram for single engine with side-mount RC and above 115 w/ oil injection.
Wiring diagram for single engine with binnacle RC and above 115 w/ oil injection.
Wiring diagram for twin engine application with binnacle RC for 250G/L250G.
Wiring diagram for analog meters with 2-stroke engines.
Wiring diagram for analog meters with 2- and 4-stroke engines.
Wiring diagrams for analog tachometers with 4-stroke and 2-stroke engines.
Lists engine models compatible with digital network gauges.
Details the Yamaha Security System for limiting engine speed.
Lists models compatible with the Digital Network Premium Gauge (6Y9) system.
Provides wiring diagrams for various engine configurations and gauge setups.
Wiring diagram for single engine with 6X6 binnacle mount DEC.
Wiring diagram for single engine with 6Y8 gauge and 6X7 concealed Digital Electronic Control.
Wiring diagram for twin engine application with 6Y9 gauges.
Wiring diagram for twin engine application with 6Y8 gauges.
Wiring diagram for triple engine application with 6Y9 gauges.
Wiring diagram for quad engine application with 6Y9 gauges.
Wiring diagram for dual station with 6Y9 gauge, single engine.
Wiring diagram for dual station with 6Y8 gauge, single engine.
Wiring diagram for twin engine application with 6Y9 gauges, dual station.
Wiring diagram for twin engine application with 6Y8 gauges, dual station.
Wiring diagram for triple engine application with 6Y9 gauges, dual station.
Wiring diagram for quad engine application with 6Y9 gauges, dual station.
Lists recommended battery specifications for 4-stroke and 2-stroke engines.
Illustrates battery wiring for single and multi-engine isolator-equipped models.
Provides maximum total extension lengths for battery cables based on model and temperature.
Specifies the required fuel flow volume and hose routing standards for high-horsepower models.
Checklist for enhancing customer satisfaction before operating the outboard motor.
