Westerbeke 50 - On Engine Fuel System - Bleed Procedure

V.24
SERVICE BULLETIN
DATE:
December 8, 1983
BULLETIN NUMBER: 130
MODEL: W50
SUBJECT: On Engine Fuel System- Bleed Procedure
(REFER TO THE ILLUSTRATION WHEN FOLLOWING THE PROCEDURE BELOW)
1. After air has been bled from that portion of the fuel system between the
fuel tank
and engine, the use of the manual primer on the fuel lift pump
can aid in accomplishing this, proceed to bleed point #1 with a 5/8" box
wrench. Loosen this banjo bolt 1 - 2 turns. (Do not remove the bolt
from the filter.) Work the manual priming lever on the fuel lift pump
and purge all air out of the secondary filter until fuel free of air
bubbles flows from around this banjo bolt. Once fuel free of air flows
from around the bolt, retighten the bolt.
NOTE #1: You may want to place a small plastic garbage bag
around and under the secondary filter with a few
paper towels to catch the fuel.
NOTE #2: When working the manual priming lever on the fuel lift
pump, move it with long and deliberate strokes - NOT
rapidly. In some rare instances, the lift pump may
internally be at or near the maximum pump stroke
and no pumping action will be achieved using the
manual external priming lever, making it necessary
to turn the engine over
slightly with the starter
to reposition the pump internally.
2. With the aid of a 5/16" box wrench, or socket (1/4" Drive), open the
bleedscrew
#2 on the side of the fuel injection pump, 1 or 2 turns.
DO NOT remove the screw. Again work the manual priming lever on the
engine-mounted fuel
lift pump; purge all air from this area of the
fuel injection
pump and when fuel free of air flows, retighten the
bleedscrew
#2.
NOTE: Models with pushbutton starting refer to the inset
for point #2A located on the fuel pressure switch
manifold
mounted at bleed point #2 on the injection
pump. Bleed #2A as above.
3.
With the aid of 5/16" box wrench or socket (1/4" Drive) open the
bleedscrew
#3 and bleed this portion of the injection pump as in
Step #2.
NOTE:
PIN: 33547
Ensure that the throttle is full open and the engine
shut-off lever
is in the RUN position when proceeding
to
Step #4.
over ....... .
J. H. WESTERBEKE CORP.
AVON INDUSTRIAL PARK, AVON, MASS. 02322· (617/588-7700
CABLE: WESTCORP, AVON· TELEX: fl2- ••••