Yamaha — Fuel Cock Cleaning
Maintenance
From a Yamaha owner's manual covering: EF4000DE, EF5200DE, EF6600DE, YG4000D, YG5200D, YG6600D. Check it applies to your exact model before use.
Before you start
- Never use or be near fuel and solvent while smoking or in the vicinity of an open flame.
- Be sure the fuel cock cup is tightened securely.
Procedure
- Stop the engine.
- Turn the fuel cock lever to OFF.
- Remove the fuel cock cup and gasket.
- Clean the cup with solvent and wipe it off.
- Check the gasket; replace it if damaged.
- Reinstall the gasket and fuel cock cup.
Tools required
- Solvent Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Yamaha owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.