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This a replacement O.S. Engines Woodruff Key. A Woodruff Key is a semi-disk that locks the Drive Washer to the Crankshaft.
This Part Is Used With The Following O.S. Engines
| FS-72-a |
FS-70 Ultimate |
FS-56-a
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FS-52 Surpass Heli
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FS-52 Surpass
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FS-48 Surpass |
91 SZ-H |
91 SX-H
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91 SX-H C-Spec
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91 RZ-H DH
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| 91 RZ-H |
61 SFN-H |
61 SX-H
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61 SX-H WC
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91 SZ-H PH
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61 RX-H RE |
61 RFN-H |
50 SX-H
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50 SX
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40 PS
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NOTE: This part may be compatible with other O.S. engines. Please check your owner's manual and cross reference the part number to verify that this is the correct part for your engine.
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