Kleenoil KU50 Bypass Oil Filter Replacement Cartridge — KF50-1878
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Kleenoil KU50 Bypass Oil Filter Replacement Cartridge — KF50-1878
A genuine replacement filter cartridge for the Kleenoil KU50 and 9778 bypass oil filtration units. Kleenoil bypass filtration works alongside your engine’s full-flow filter to continuously clean a portion of the oil to a much finer level — removing sub-micron particles, water, fuel dilution, and combustion acids that a standard full-flow filter cannot capture. This cartridge is the consumable element at the heart of that system and must be replaced at regular service intervals to maintain filtration performance.
Parts Desk Insights
Best suited for diesel inboard engines running a Kleenoil KU50 or 9778 bypass filtration unit — a common fitment on commercial vessels, workboats, and serious cruising sailboats where extended oil life and engine protection are priorities. Bypass filtration is particularly valuable in high-hour engines, engines operating in dusty or contaminated environments, or anywhere extended oil change intervals are desired. Replace this cartridge according to your Kleenoil service schedule — typically every 250–500 engine hours or annually, whichever comes first. Do not attempt to clean or reuse the cartridge. Confirm your unit model number (KU50 or 9778) matches before ordering, as cartridge compatibility is model-specific.
Key Features
- Genuine replacement cartridge for Kleenoil KU50 and 9778 bypass filter units
- Removes sub-micron particles, water, fuel dilution, and combustion acids
- Extends engine oil life and reduces wear on critical engine components
- Direct drop-in replacement — no modifications required
Specifications
- Part Number: KF50-1878
- Compatible Units: Kleenoil KU50, 9778
- Filter Type: Bypass oil filtration cartridge
- Application: Marine diesel inboard engines
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.