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Old 10-14-2007 | 03:57 PM
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Missileman
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From: Poland, OH
Default RE: OS 90 four cycle engine new in box
It has slightly less power than the newer 91FS engines so I would start with a 13X6 or 13X7 sport prop.
Run it rich and it will last you many years.
Yes the OS type F glow plug and any fuel with 15% nitro and at least 18% oil.
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