I my mind, the main reason to warm up the engine is to make sure that it would
not stall when you drop the revs to idle. When you leave the slip, you want to
make sure that the engine is operating properly and it is available, when you
need it (tight quarters manoeuvring). It is enough to warm it up to a point
when it runs smoothly at idle. Generally, if you start it up and then go about
untying the dock lines you should be fine. In the fall, it takes a bit longer
(here, the air might be nippy).
Marek
Ottawa, ON
From: Dennis C. via CnC-List
Sent: Monday, June 20, 2016 12:12
To: CnClist
Cc: Dennis C.
Subject: Re: Stus-List Warm up diesel engine
Diesels don't like to be run at idle. Particularly Yanmars. Idling a Yanmar at
idle or slow speed for long periods may cause soot build up in the exhaust
elbow. It's better to operate them with a load at higher rpm.
That being said, you still need to let it warm up a few SECONDS or so to ensure
good lubrication. Search the Internet, you'll find lots of articles by
mechanics that debunk the myth of letting engines warm up for minutes before
using. Their reasoning is that engines warm up quicker under load than at idle.
Idling a cold engine actually causes more wear. However, they recommend
moderate rpm until reaching operating temperature.
It's a balancing act.
Dennis C.
Touche' 35-1 #83
Mandeville, LA
On Mon, Jun 20, 2016 at 10:41 AM, Joel Aronson via CnC-List
<cnc-list@cnc-list.com> wrote:
The 3GM manual:
1) Warm up the engine for more than 5 minutes. Because lube oil does not
reach all the
moving parts as soon as the engine is started.
Operate the engine at around 850-900 rpm for at least five minutes.
On Mon, Jun 20, 2016 at 11:36 AM, Franklin Schenk via CnC-List
<cnc-list@cnc-list.com> wrote:
A friend of mine insists that you cannot warm up a Yanmar engine at idle
speed. When we are still in the slip he puts it in gear and runs at about half
throttle. None of the other sailors appear to do this. Unfortunately many do
not give the engine a chance to warm up at all. I am open to suggestions and
the reason for what you are doing.
Frank
c/c 29
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_______________________________________________
This list is supported by the generous donations of our members. If you like
what we do, please help us pay for our costs by donating. All Contributions are
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