o.s la max fuel question

by joe
(bear delaware)

yes i purchased a o.s la max .40 engine at a auction.

my question is about the fuel im using 10% nitro in the engine.the engine seems to run fine.

the question is im using tower power airplane fuel 10% nitro 18% synthetic oil. is this ok or should i use a higher oil content/ every body is talking caster oil can you help?

one other question their is not much smoke coming out of the exaust its very faint

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o.s la max fuel question

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Jun 23, 2010
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Add a bit of castor
by: Anonymous

G'day

The 10% nitro is just about right but with a plain bearing engine like the LA, would add a small amount of castor oil to the mix to bring the total oil up to about 20%. Plane bearing engines benefit from a bit of castor.

You are not seeing much "smoke" either because you have it tuned pretty lean or simply because the oil is burning. Smoke is usually not smoke at all but oil or oil plus fuel vapour. Adding some castor will help in this area too and the engine will last longer.

Mike from Oz