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Old 09-22-2009 | 08:57 PM
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Gray Beard
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From: Hemderson, NV
Default RE: What four stroke in a 40 sized warbird.

ORIGINAL: zain

YS 63s will give you more then enough power to fly any 40 size airframe. Great engines once you get them tuned out correctly, if you do not have any experience with YS then get someone at your club who does to help you out with them. They run great inverted as well.

Zain
I see this statement a lot about YS plus some odd ideas about them needing high nitro fuel. I would like to know what the difference is between tuning a YS compared to any other engine?? The regulator is almost never touched or adjusted so all you have is the high and low needles like any other engine. Brett, I got my OS 1.20 pumper for free and an OS 91 non pump for free and an older OS 70 for 100 bucks. GOTCHA!! I'm working on a saito 1.25 for free too but I think I'm just blowing smoke on that deal.[>:] Has anyone ever heard me mention how much I like free??
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