Bleeding The Fuel System - Yanmar 6LPA-STP2 Service Manual

Diesel Fuel
12/05

Bleeding the Fuel System

Bleeding must be done if any fuel system
maintenance has been performed (replacement of
fuel filter, etc.) or if the engine does not start after
several attempts.
Figure 3-20
( 2 )
Figure 3-20
1. Check the fuel level in the fuel tank. Refill if
necessary.
2. Open the fuel cock of the fuel tank. WARNING!
ALWAYS wear safety glasses when bleeding
the fuel system.
3. Loosen the air bleed screw (Figure 3-20, (2))
2 to 3 turns.
6LPA Service Manual
( 1 )
0004908_s1
© 2007 Yanmar Marine International
GENERAL SERVICE INFORMATION
4. Push up and down on the priming pump
(Figure 3-20, (1)) to release air out of the air
bleed screw. WARNING! Ensure no fuel is
leaking from the seals of the air bleed screw
while pushing on the priming pump.
5. Continue pumping until a solid stream of fuel
with no air bubbles begins to flow.
6. Tighten the air bleed screw.
3-21