Westerbeke 30 - Page 127

V.6
SERVICE BULLETIN
DATE:
October 4, 1974
BULLETIN NUMBER: 74
MODEL: FOUR-91 and FOUR-60
SUBJECT: Air Filter Element Part 16010
On a few engines we find the air filter is very sensitive to a poor
environment and clogs easily, sometimes in as few as 20 to 30 hours.
The symptoms are: Loss of RPM Loss of Power
Black Smoking
Check the air filter first -- remove it and see if situation clears.
Here are prime causes of air filter choking:
1. Leaking exhaust on exhaust piping allowing
soot to
be expelled and sucked into element.
2. Lint or fiberglass in engine compartment
drawn into filter element.
3. Excessive oil contamination from crankcase
breather.
It is not advisable to run without a filter even though removal appears
to cure the
problem. You run a great danger in drawing foreign matter
right into the
engine and ruining it. Likewise if the surge tank water
cap is at all loose, you can draw water in through the manifold opening.
PIN: 19308
REPLACE THE FILTER - DON'T REMOVE IT.
J. H. WESTERBEKE CORP.
AIfOIil INOUSTRIA' ,.AR", AIfOIII, _AS •• 02:122· (.f7} ••• -7700
CAe,.: W.STCOR,., AIfOIII· T.'.1(: 82-4444