[C320-list] Yanmar 3Gm30 typical fuel consumption?

[Arthur Miller]

FWIW:  I average .6 g/h, have used .75 g/h pushing against tide and heavy weather.
I use .75 g/h plus gage to judge time to fuel.
Art.  # 680

Sent from my iPad

> On Jun 5, 2016, at 8:47 AM, Graeme Clark <cg at skyflyer.co.uk> wrote:
> 
> Now I'm confused! Some people saying 0.75 and others 2.2 gal per hour!
> My typical average is under 0.5 but that includes a lot of gentle pottering so probably more when sustained high rom, obviously
> 0.75 sounds sensible. 2.2 sounds mad!
> Graeme
> 
> Sent from mobile: please excuse typos etc.!
> 
> 
>> On 5 Jun 2016, at 11:39, John Meyers <jcmeyers7 at gmail.com> wrote:
>> 
>> On my 1997 3GM30 last year I got 2.2 gallons per hour for the 23 gallons
>> that I use all year. That was a mix rpms  from 1500 to 3000. I do have a 3
>> big bladed feathering propeller that may have something to do with that.
>> 
>> John Meyers
>> Muskegon MI
>> Wind Chime #406
>> 
>>> On Sat, Jun 4, 2016 at 12:53 PM, John Frost <john at frostnet.net> wrote:
>>> 
>>> The spec for my 3YM30 (Note the Y) has a chart that says approximately
>>> .3GPH @2000RPM
>>> .4GPH at 2250RPM
>>> .6GPH at 2500RPM
>>> 1.1GPH at 3000RPM
>>> 1.3GPH at 3250RPM
>>> 1.7GPH at 3500RPM
>>> 1.9GPH at 3650RPM
>>> 
>>>                                        +
>>> Happy Sailing!          /||\
>>> John                           / ||  \
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>>>                     /                ||                \
>>>                   /                  ||                  \
>>>                 /                    || Hull 1118 \
>>>               /                      ||                      \
>>>             /                        ||                         \
>>>           /     Catalina     ||                           \
>>>         /     C320MKII    ||                             \
>>>       /            2007         ||                                \
>>>     /                                ||_____________\
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>>>    \              Lake Guntersville, AL                    l_
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>>> -----Original Message-----
>>> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On
>>> Behalf Of Karl Mielenhausen
>>> Sent: Saturday, June 4, 2016 11:32 AM
>>> To: C320IA Discussion List
>>> Subject: Re: [C320-list] Yanmar 3Gm30 typical fuel consumption?
>>> 
>>> Yanmar literature states 0.3 gpm (actually 1.1 lpm) at 1800 rpm.
>>> 
>>> Karl
>>> 
>>>> On Sat, Jun 4, 2016 at 10:16 AM, Graeme Clark <cg at skyflyer.co.uk> wrote:
>>>> 
>>>> Hi all. I have a broken fuel gauge and we have logged 30 hours since
>>>> tank was last filled. The local fuel supplier has had a breakdown and
>>>> I'm some considerable distance from next nearest, with light to calm
>>> winds!
>>>> Trying to assess my likely remaining fuel. Of that 30 hrs a large part
>>>> has been sub 1500rpm just mooring up etc I'm thinking about 0.4 gal/hr
>>>> maybe 0.5 to be conservative. I have a spare gallon can also!
>>>> Anyone have a better guess?
>>>> Thanks
>>>> Graeme
>>>> #366, currently in the Isles of Scilly!
>>>> 
>>>> 
>>>> Sent from mobile: please excuse typos etc.!
>>> 
>>> 
>>> 
>