Reducing The Fuel Pressure; Checking The Vapor Separator - Yamaha F150A Service Manual

FUEL

Reducing the fuel pressure

1. Remove the cap 1.
2. Cover the pressure check valve a of the
fuel rail with a rag, and then press in the
pressure check valve a using a thin
screwdriver to release the fuel pressure.
WARNING
Always reduce the fuel pressure in the
high-pressure fuel line before servicing
the line or the vapor separator. If the fuel
pressure is not released, pressurized fuel
may spray out.
3. Place a container under the vapor sepa-
rator drain hose, and then loosen the
drain screw 2.
4. Remove the cap 3.
5. Drain the fuel from the vapor separator
drain hose by pressing the valve using a
thin screwdriver.
4-15
Fuel system
1
a
S63P4160

Checking the vapor separator

1. Check the needle valve for bends or
wear. Replace if necessary.
2. Check the float for deterioration. Replace
if necessary.
3. Check the filter for dirt or residue. Clean
if necessary.
S63P4180
S63P4190
63P3F11