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Old 08-03-2008 | 09:51 AM
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Ken4
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Default RE: Do 4stroke engines need to use 4stroke fuel?
Thanks for all your replies. My manual says 5 to 20% nitro and minimum 18% lube. Cool Power 15% has only 17% lube. So am I in trouble?

Also my 13x6 prop is brand new, so I doubt it's unbalanced. And my engine is mounted sideways.
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