Item 49917 has must read information.
: This consult factory information is ONLY for 2000138 engine..If ordering the ring gear for 2000138 JLG must first be contacted...All other engines use ring gear p/n listed in the JLG parts manual. 

GN-GEAR, RING

$298.50
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49917

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: 13.1  : 13.3  : 0.1  : 2.35

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EA
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GN-GEAR, RING - 49917