OS MAX 15 RC - A run

[@WayneCook306]

You want your idle set at about 2500 RPM, Good run in any case.👍👍👍

[@kittyhawk9886]

Love those looped scavenged cast iron piston , chrome liners! Great sound! Where did you get the engine test stand? Thanks for sharing.

[@VintageTechFan]

It's an "PSP test stand" I imported from the US a few years ago. Unfortunately during Covid they decided not to make these anymore. Even the website seems to be gone. You may get one used, though.

[@McGyver0479]

Preciso come un orologio!

[@ARMY_RUGS]

I have optimax fuel 15% nitro do I have to mix with oil ?

[@VintageTechFan]

If it's the one I found online with 18% synthetic oil, you should add some castor oil to get it to 22-23% total oil content for those old iron piston engines, yes. Modern ones are fine with it as it is.

[@mamachou2504]

Hi, may I ask where can I buy this test stand?

[@VintageTechFan]

It's the "PSP test stand" which is now sadly out of production.

[@mamachou2504]

@@VintageTechFan Pity

[@jakelang4387]

I came across one of these ,it's on a old hangline plane ,,it appears locked up

[@VintageTechFan]

Most likely just gummed up castor oil, very typical. Soak it in WD-40 or something like that, heat it up with a heat gun and CAREFULLY try to turn it (do not force it, that can bend the conrod). It should become free. Then disassemble, and clean.

[@ARMY_RUGS]

Nice video can you please give the link for purchase . Thnx bro

[@VintageTechFan]

It's an engine from the 1970s .. I got it from ebay, I think.