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Thread: Ryobi 31cc, walbro carb options
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Old 05-23-2007 | 07:30 PM
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davewallace
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Default RE: Ryobi 31cc, walbro carb options
Coolbean,
One big difference between the 9.5mm and 11mm is the throttle bore. The 9.5mm has a 1/2" bore and the 11mm has a 5/8ths" throttle bore which matches the backplate manifold.

Dave
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