Description
Oil Pump Ball – 8.5 mm (Rotax Part No. 432680)
Description
A precision-machined steel ball used within the oil pump assembly of Rotax 912 and 914 series engines. This component functions as a check valve, maintaining correct oil flow and pressure during engine operation.
Key Features
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Diameter: 8.5 mm
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High-strength hardened steel construction
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Designed specifically for use in Rotax mechanical oil pump housings
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Standard fit for oil pump housing part number 911815
Benefits
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Maintains proper oil circulation and prevents reverse flow
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Supports consistent lubrication pressure in Rotax 912 and 914 engines
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Essential for pump rebuilds and preventive maintenance
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Contributes to long-term engine reliability and smooth operation
Application Notes
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Commonly replaced during oil pump overhaul or scheduled maintenance
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Listed in Rotax oil pump assembly diagrams as a key pressure control component
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Some newer pump variants may use an alternative cone valve (part no. 857230), though the 8.5 mm ball remains standard for many installations
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Always inspect seat condition and replace ball if worn or pitted
