Description
Protect your compatible Cummins Onan generator engine with this three-pack of genuine OEM 0122-0645 oil filters. Designed for select Emerald, Marquis, and older gasoline RV generator sets, these filters help remove dirt, metal particles, and other contaminants from the engine oil before they circulate through critical components.
Regular oil and filter changes can help maintain clean lubrication, reduce premature engine wear, and support dependable generator operation. The convenient three-pack provides filters for future maintenance intervals, spare inventory, or servicing multiple compatible generators.
Package Includes:
• 3 genuine Cummins Onan oil filters
Part-Number References:
• Current part number: 0122-0645
• Legacy part number: 122-0645
• Also written as: 1220645
Compatible Applications Include:
• Select Onan Emerald generators
• Select Onan Emerald Plus generators
• Select Onan Marquis generators
• Select BGE and BGEL generator models
• Select BGM generator models
• Select NHE and NHEL generator models
• Certain older Onan gasoline RV generators with horizontally opposed twin-cylinder engines
Product Features:
• Genuine Cummins Onan OEM filters
• Helps capture contaminants in the engine oil
• Supports proper lubrication and engine protection
• Designed for application-specific fitment
• Convenient three-pack for scheduled maintenance
• New canister-style oil filters
Product Information:
• Brand: Cummins Onan
• Product type: Generator engine oil filter
• Part number: 0122-0645
• Previous part number: 122-0645
• Quantity: 3 filters
• Primary application: Select gasoline RV generators
• Compatible series: Select Emerald and Marquis models
• Engine oil included: No
Compatibility can vary by generator model, specification letter, and production date. Before ordering, compare the existing filter number and confirm the correct part using the generator’s complete model and serial numbers.
Always follow the generator owner’s manual for the correct oil specification, capacity, filter replacement interval, and installation procedure. Apply clean engine oil to the new filter gasket if instructed, avoid overtightening, and inspect for leaks after installation.








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