BoatBanter.com - View Single Post - Bleeding The Fuel System...is there a better way?

In article ,
(Chris Butler) wrote:

I just finished winterizing my 2002 1GM10 Yanmar Diesel (that runs on
a Menger 19' Cat boat) and think there must be a better way of
bleeding the fuel system. For the past three seasons I have changed
the water seperator and paper filter on the engine at the end of every
season. Then I begin the huge task of pumping the Raycor water
seperator for the next hour until fuel starts flowing into the engine.
After that I start pumping the lever on the oil pump (1 hour). Once I
get fuel into the lines the rest of the bleeding goes very easy. My
hand afterwards is sore and battered! I have tried cranking the engine
for short bursts with the compression lever up (this does not seem to
help). Is there anyway to prime or help this process along the way?

One quick question. Are you cracking the fuel lines downstream of
each element as you go to allow the air to get out? I suspect that you
are not, and what is happeneing is that you are compressing the air in
the fuel lines downstream of each pump. You have to let the air out so
that the fuel can flow in. It shouldn't take any time at all if you let
the air escape. Most bigger engines have Bleeder Valve right before the
injector pump, that allows the air to go directly to the Return Line
untill the fuel gets that far. If not you need to crack the fuel line
to let the air escape.

Bruce in alaska
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