Technical data

W50 injection pump only. Open the 5/16 bleed screw (Bleed Point D) on the injector line banjo bolt
one or two turns and, with, the throttle full open and the engine stop lever in the run position, crank the
engine over with the starter until clear fuel free of air flows from this point. Stop cranking and tighten
this Bleed screw.
With a 5/8 wrench loosen one to two turns the injector line attaching nuts at the base of each injector
and, with the throttle full open and the engine stop control in the run position, crank the engine over with
the starter until fuel spurts by the nuts and injector line at each injector. Stop cranking and tighten the nut
and proceed with normal starting procedures.
WESTERBEKE W13, 4.4KW, W21, 7.7KW, W27, 11.1KW, W33, 12.5KW (Figure 6)
These units are self-bleeding.
1. Turn the ignition to the ON position and wait 15-20 seconds.
2. Start the engine following normal starting procedures.
WESTERBEKE W58 & WTO 20 (Figure 7)
1. Open the bleed screw on the top inboard side of the engine-mounted secondary fuel filter one to
two turns using a l0mm box wrench (Bleed Point A). This fuel filter is equipped with a hand-
operated priming pump. With the palm of your hand:, pump this primer until fuel free of air
flows from this point. Stop pumping and tighten the bleed screw.
2. With bleed screw A tightened, pump the hand primer several more times. This primes the
injection pump which is self-bleeding. The injection pump incorporates a feed pump which keep
the fuel system primed when the engine is running; thus, no external lift pump is required.
3. Loosen the four injector line attaching nuts at the base of each injector (Bleed Point B) one to
two turns with a 16mm open end wrench. Place the throttle in the full open position and crank
the engine over with the starter until fuel spurts by the nut and injector lines. Stop cranking and
tighten each of the four nuts and proceed with normal starting procedure. "