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Aviation Gasoline in a 26 cc MVVS engine

Old 08-21-2011, 03:51 PM
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blohmvoss
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Default Aviation Gasoline in a 26 cc MVVS engine

I would like to know if someone has used aviation gasoline in a MVVS engine and the experiences with it. Mine is a 26 cc. I'm trying to change just for the auto gas smell. It will be interesting to know if Mr Pe Rivers has done a test with it
Old 08-21-2011, 05:57 PM
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denoferth
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Default RE: Aviation Gasoline in a 26 cc MVVS engine

I haven't tried it yet but the boys up at RC Warehouse told me the fellows around there were using a mix of 40% avgas and 60% Colman fuel in their gassers.

Dennis
Old 08-22-2011, 07:27 AM
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pe reivers
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Default RE: Aviation Gasoline in a 26 cc MVVS engine

Don't
Avgas is not leadfree. Coleman is not suitable for IC engines.
The only neutral smelling fuel that is suitable is ASPEN, mixed with 3% oil. This is an Alcylate fuel with proper octane rating and it is leadfree.
I believe it is available in Canada, but not in the USA. Stihl dealers should carry it.
Old 08-24-2011, 01:51 PM
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blohmvoss
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Default RE: Aviation Gasoline in a 26 cc MVVS engine

Thanks Dennis for your answer Rogelio
Old 08-24-2011, 01:55 PM
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blohmvoss
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Default RE: Aviation Gasoline in a 26 cc MVVS engine

Hi Pe. Tthanks for your attention but I'm not familiar with fuels. What problems could I encounter if I use the aviation fuel being not unleaded? Rogelio.
Old 08-24-2011, 02:01 PM
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pe reivers
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Default RE: Aviation Gasoline in a 26 cc MVVS engine

The lead and it's oxides will deposit on metal parts as ash, and will cause all kind of problems, especially on spark plugs where lead deposits tend to bridge the spark gap.
Apart from that, lead and it's derivates are extremely poisonous, and contact whith them should be avoided whenever possible.

In old type 4-stroke engines the engineers relied on lead deposits to lubricate the valve seats and lower stems. This does not apply to two stroke engines. Because for normal use lead is banned, all engines now use metallurgy that allows the use of leadfree gas. Avgas with it's high octane rating is only of value in airplane engines that need decent manifold boost pressures at high altitude so they can get the required thrust to fly a loaded plane. The 100LL Avgas has lowered lead levels, but is not yet leadfree.

Old 08-24-2011, 02:35 PM
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blohmvoss
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Default RE: Aviation Gasoline in a 26 cc MVVS engine

Pe. Thanks again for your information it's very informative. Rogelio

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