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OS 90 four cycle engine new in box
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10-14-2007 | 01:49 PM
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w8ye
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RE: OS 90 four cycle engine new in box
Is it a 90 or a 91 surpass?
Try to use fuel with a combination of Castor oil and synthetic oil. Use 10% or 15% nitro
Use a OS "F" plug
Use a 14-6 prop.
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RE: OS 90 four cycle engine new in box