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Joined: Jan 2012
Posts: 1,842
Likes: 14
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Originally Posted by Bluegmhtmonaro
A testament to todays oils I guess. And im thinking manufacturers original Ratios no longer apply.
Very true, that. Few people outside of the lubricant/tribology [lubrication engineering] field realise just how great the advances in these technologies have been, in the period 1950's to the present day.

Changing the fuel mix ratios can be a bit tricky though; as the changes in density, viscosity and surface tension of the fuel/oil mix will also have a significant effect on the fuel/air mixture ratio that a carburettor achieves. All else being equal, lowering the oil content will tend to richen the mixture.


Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."
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Blue and Gadge,

Gadge, I understand the smiley emoticon after 'comprehensive knowledge' grin

Yes Mal,

I think oil and fuel and the ability of them both to stay in suspension,
as a mix, was of concern 'in the day'. Note that Villiers in their instructions
only recommended one brand ... "Oils ain't oils".

I think we are all old enough to remember:-

[video]
[/video]

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[Linked Image]

A History Record is now available for the Pope Model 320.
That record may be viewed at:

https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=59826

[Linked Image]

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