PS Magazine - TB 43-PS-470
PS, The Preventative Maintenance Monthly
ISSUE 470
JANUARY 1992
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enerally when you spot fuel in the engine crankcase, you thinK oF a LeaKy
dIaphRagm ±n The fuel pUmp. BUT that's noT necessariLy The case w±th smaLL
1/2-
to 6-HP miliTa²y standaRd engines³
A loT oF operaToRs ´OrgeT and Leave Tµe choke on
haLFway¶ EVen though The engine sounds fine· iT rUns
RIch¸ ¹haT means a ºoT o» unbU¼ed fuel ends up
in Tµe crankcase½
So¾ Tµe operaToR noTices Fuel ±n the oiL duR±ng
RoUT±ne PMCS and Repo¿Ts ±t. A good Àechan±c
sUspecTs Tµe »UeL pUmpÁ But be´ORe you repLace
the pUÀp dra±n and RepLace the o±LÁ STa²t The
engine and leT ±t RUn fÃR a haL» hoUR or so³
Ä» The engÅne doesn'T ¿un smoothLy on open
choKe afTer The engine ±s waRÀed Up, adjust
Tµe carbUreTorÆ YoUR engIne ÇM giVes the
compleTe ÈnsÉUcT±ons on how to adjUsT
the carbuRetor.
AFteR yoU shUT down, check tµe oIlÊ Ë»
yoU spot bUbbLes or smeLL fuel· Replace
The »Ìel pumpÍ
Ë» tµeReÎs no smeLL or bubblesÏ the
eng±neÎs good To goÐ
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