Hi Fred

Our 3 cyl yanmar had all three injectors rebuilt 20 months ago.  The engine 
would puff out a cloud of black smoke when starting and then run fine with no 
smoke after that.  This was the case before rebuilding the injectors and is 
still the case after the rebuild.  When I asked our local expert about it he 
called it “Old Yanmar” and said it was fine.

My understanding is that BLACK smoke is unburnt fuel.  Our engine usually 
catches on 2 cylinders before the third.  Am guessing that perhaps I may be 
losing a bit of the fuel before third cylinder while engine is off for a long 
time.  By the time all three cylinders getting fuel the one that had it first 
probably had extra fuel and therefore the black smoke.  Of course this is only 
a guess ….  Not sure what BLUE smoke with relation to diesels

Mike

Persistence
Halifax, NS

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Fred Hazzard 
via CnC-List
Sent: Tuesday, July 03, 2018 1:29 PM
To: cnc-list@cnc-list.com
Cc: Fred Hazzard
Subject: Stus-List Diesel injectors

My 4 cyl Yanmar (non turbo) has begun to smoke a lot more when first starting. 
It is a blue smoke that mostly goes away when it warms up. It starts very 
easily and runs smoothly with good power.
I would love to hear your opinions of possible problems and cures.

Fred Hazzard
S/V Fury
C&C 44
Portland Or

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