Josh
Aha...I have been wondering about the apparent inability of my 3HM35F
to run at much of anything above 3000 RPM, even in neutral. The
variance from the 20 year old analog tach would account for that. I
have been running at about 24-2600 RPM on the tach, which, if that
variance from actual on mine as it was on yours, it makes perfect sense.
thx...I feel much better now...
Tom B
Tom Buscaglia
SV Alera
C&C 37+/40
Vashon Island WA
(206) 463-9200
www.sv-alera.com
At 03:49 PM 5/27/2014, you wrote:
Message: 7
Date: Tue, 27 May 2014 18:44:55 -0400
From: Josh Muckley via CnC-List <cnc-list@cnc-list.com>
To: "C&C List" <cnc-list@cnc-list.com>
Subject: Re: Stus-List RPMs on Your Diesel Engine
Message-ID:
<ca+zacrd3fh6n4s8+tew-3-1w_jga4ver9onjob1xctjjlce...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Yanmar 3HM35F 30hp @3200 rpm continuous. 3400rpm for 1hour. 3600rpm max.
My manual says to avoid extended operation at high vibation rpm. The
Idle/shift/minimum rpm spec is 800. The Kanzaki transmission is required
to be shifted less than 1000rpm.
I push it as hard and fast as I can while watching and smelling for black
smoke. The rpm by analog tach is usually 2500-2800 but by laser-tach it
usually adds about 200-400rpm. Boat speed is between 6.0-7.5kts. The
throttle lever slips a little so after extended operation the rpms creep
down and I'll have to re-throttle up. I don't worry about fuel consumption
since I don't use my 40 gallon tank fast enough anyway.
I hate running the engine but the noise is basically the same regardless of
rpm.
I also use a great product called Opti-lube XPD. I strongly recommend it.
It is marketed to restore the lubricity that has been lost by ultra low
sulfer diesel (ULSD). My expierience is that the engine runs smoother, min
idles a little higher and smoother, and can attain a higher rpm before
black smoke.
My understanding with ALL diesels is that you want to run the engine near
full rpm and load as often as possible and the prop should be pitched
accordingly.
Josh Muckley
S/V Sea Hawk
1989 C&C 37+
Yanmar 3HM35F
Solomons, MD
On May 27, 2014 12:16 PM, "Edd Schillay via CnC-List" <
cnc-list@cnc-list.com> wrote:
> Listers,
>
> Curious to know what you set as your own personal Max RPMs on your diesel
> engine? The Enterprise has an Universal M35.
...snip...
> To change your list preferences, including unsubscribing -- go bottom of
> page at:
> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
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