Josh. That's correct,  you are talking about Diesel engines. The Atomic 4 is a 
gasoline engine with a simple throttle governing the carb throttle. Your lawn 
equipment likely will have a spring loaded air vane sitting in the air stream 
produced by the flywheel fan that will moderate the throttle butterfly 
according to load.  

Rich Knowles
Indigo. LF38
Halifax

On 2013-08-20, at 16:37, Josh Muckley <muckl...@gmail.com> wrote:

Rich,

My Yanmar 3HM35F has a governor and it works exactly like all three of my home 
generators and the one I've see on an old Lister diesel.  Basically the 
throttle pulls in opposition to the governor.  When you set the idle speed you 
are adjusting a screw to push or pull in opposition to the governor and in 
favor of the throttle.

This is also similar to the set up found on the 3.5 megawatt diesels I have at 
work.

EThe only engines I have experienced on which I can't recall any governors is 
my lawn equipment.  I just assumed I hadn't found it yet ;-)

I just can't figure out any other way for the engine to automatically cut fuel 
as it over speeds in neutral.

Josh


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On Aug 20, 2013 1:44 PM, "Knowles Rich" <r...@sailpower.ca> wrote:
>
> Josh: Usually speed is a function of throttle. If more sophisticated control 
> is needed, such as a generator that has to maintain a constant speed to keep 
> the AC frequency constant, a governor of some sort will be added. Most marine 
> gas propulsion engines do not have governors as the loading with a propellor 
> is fairly constant. 
>
>
> Rich Knowles
> Indigo. LF38
> Halifax
>
> On 2013-08-20, at 13:09, Josh Muckley <muckl...@gmail.com> wrote:
>
> Apologies for my ignorance.  I was speaking in general small engine terms.  
> Without a governor what is the feed back loop that prevents over speed and 
> under speed?  Many people mistakenly call rev/speed limiters governors and 
> visa/versa. 
>
> Josh
>
> -- 
> When privacy matters.
> http://www.secure-my-email.com
>
> On Aug 20, 2013 11:38 AM, "Knowles Rich" <r...@sailpower.ca> wrote:
>>
>> I was not aware that an Atomic 4 has a governor...? 
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