FS20083 Fuel Water Separator Filter LF17511 PF9908 Replacement - Fits

In this review of the FS20083 fuel water separator and associated replacement filters, the bottom line is simple: this is a budget-friendly replacement option for owners of ISX and Detroit Diesel DD13, DD15 and DD16 engines who need a direct-fit, serviceable fuel filter. The reviewer found the unit functional and straightforward to install when following the supplied guidance to prime the system and check for leaks. While build quality opinions vary among users, the main reason to buy is the broad compatibility with common OEM reference numbers and the practical 12-month warranty.

Key Features

• Wide compatibility: Works as a replacement for many OEM reference numbers so it is likely to match existing fuel and oil filter fittings on ISX and Detroit Diesel engines.
• Fuel and water separation: Provides the expected separation function to protect injectors and fuel system components from water contamination.
• Multiple cross references: Covers PF9908, LF17511, FS20083 and related cross part numbers, simplifying sourcing for maintenance.
• Service guidance included: The instructions recommend priming, starting and checking for leaks after installation which helps avoid common installation issues.
• Warranty and support: A 12-month warranty and lifetime support give buyers recourse if the part is faulty or fitment questions arise.

Who It's For

This filter assembly is best for fleet operators, owner-operators and diesel service technicians who run Detroit Diesel ISX series engines (DD13, DD15, DD16) and want a cost-effective replacement that references multiple OEM numbers for easy cross-checking. It is also useful for shops that maintain a variety of engines and need compatible aftermarket parts on hand.

Those who require factory original parts with verified manufacturing provenance or who prioritize premium perceived build quality above price may prefer to source an OEM filter instead. Customers who do not feel comfortable priming and testing for leaks after installation should consider professional installation.

Pros & Cons

Pros

• Good fitment for ISX DD13, DD15 and DD16 engines, matching many OEM references and easing installation.
• Functional fuel/water separation and filtration performance reported as reliable by many users.
• Clear post-install instructions and a 12-month warranty provide practical support after purchase.
• Cost-effective alternative for replacement and fleet maintenance budgets.

Cons

• Quality reports are mixed among customers, so build consistency may vary between units.
• Not sold as an original OEM part; buyers needing factory-branded items should look elsewhere.

Specifications

Compatible Engines	ISX DD13, DD15, DD16 Detroit Diesel
Cross Reference	PF9908, LF17511, FS20083 and multiple OEM numbers
Included Guidance	Prime system, start engine, wait and check for leakage
Warranty	12-Month Warranty and Lifetime Support
Intended Use	Fuel water separation and fuel filtration replacement
Note	Aftermarket replacement parts, not original parts

Our Verdict

The FS20083 replacement filter is a sensible value option for diesel owners who need a direct-fit fuel/water separator for ISX and Detroit Diesel engines; it covers many cross references and includes practical installation advice. It represents good value for routine maintenance, provided buyers accept aftermarket variability and follow priming and leak checks after installation.

Frequently Asked Questions

Will this fit my DD15 engine?
Yes, it is specified as compatible with ISX DD13, DD15 and DD16 engines and lists multiple cross-reference part numbers for confirmation.

Is this an original manufacturer part?
No, this product is offered as an aftermarket replacement part and not an original factory part.

What should I do after installing the filter?
Prime the fuel system, start the engine, wait a few minutes and then inspect the unit and connections for any leakage as advised in the instructions.