Description
The NGK VV0016 is a Variable Valve Timing (VVT) adjuster magnet for Yamaha 4.2L V6 four-stroke outboards. Also described as a VVT solenoid, this engine-management component controls oil flow to the VVT assembly. The product page identifies the F225XB among its applications and directs buyers to confirm the engine’s exact model and year before purchase. Keep the NGK VV0016 part number with your service records or comparison details when checking the part against the engine.
Key specifications
- Part number: NGK VV0016
- Product type: Engine Variable Valve Timing (VVT) adjuster magnet
- Also called: VVT solenoid
- Function: Controls oil flow to the Variable Valve Timing (VVT) assembly
- Engine family identified on the listing: Yamaha 4.2L V6 four-stroke outboards
Applications / Compatibility
The product listing identifies Yamaha 4.2L V6 four-stroke outboards as the application group. It specifically names the Yamaha F225XB and F250, then refers to related models. This is not a substitute for model-year confirmation: the page expressly says to verify the part against the specific engine model and year. Before ordering, compare the NGK VV0016 identifier with the information for the outboard being serviced and use the applicable factory documentation as needed.
Service context
The listing describes the VVT adjuster magnet as an electro-hydraulic solenoid that manages oil flow for the VVT mechanism. It lists rough or unstable idle, hesitation under acceleration, a loss of mid-range torque or power, increased vibration, check-engine or alarm indicators, and VVT-related fault codes as possible signs associated with a failing unit. These observations can help frame an inspection, but the page also recommends using a Yamaha diagnostic tool (YDS) to scan for VVT-related codes and consulting a factory service manual for detailed procedures.
Its diagnostic overview calls for checking the electrical connector for corrosion or damage and notes that testing the solenoid’s resistance and function may be performed with a multimeter and air-pressure test kit. The page also attributes possible failure to internal wear or clogging from oil contaminants, electrical coil failure, or seal degradation over time. Use those points as inspection context rather than as a stand-alone diagnosis.
Buyer guidance
Order by the complete NGK VV0016 number, not by a general VVT description alone. Confirm Yamaha 4.2L V6 four-stroke application, exact model, and model year before purchase. If the outboard has a rough idle, hesitation, power loss, an alarm, or a VVT-related code, follow the diagnostic guidance in the applicable factory service manual before selecting a replacement part. The page’s replacement overview also advises disconnecting the negative battery terminal before service and clearing stored fault codes after reassembly. No included hardware or seals are specified on the product page, so confirm the installation requirements before beginning work.
Fitment and ordering notes
- Confirm the exact model, part number, configuration, dimensions, and application against the information shown in this listing.
- Review the product images and listed attributes before ordering; fitment can vary by vehicle, equipment, year, and installation setup.
- Contact X Factor Motorsport for availability, fitment, product questions, or freight guidance before purchase.
