If an inline marine fuel filter needs replacing, identify its hose connection before choosing a similar-looking clear unit. Moeller has separate 10-micron models for 5/16-inch and 3/8-inch hose, plus a 20-micron Clear View filter kit with several barb sizes. Match the original part number and fuel-system requirements.
What to measure on the old fuel line
Verify the fuel hose inside diameter and the fitting barb. The 5/16-inch and 3/8-inch filter bodies are different MPNs.
Choose the 10- or 20-micron format specified for the engine and fuel system; a micron rating alone does not establish compatibility.
Confirm whether the original is a disposable complete filter or a serviceable filter body with separate elements.
Moeller filter identification chart
All three filter products below are for the exact applications permitted by their manufacturer. The 033319-10 kit is not a direct substitute for every fixed-barb filter.
| MPN | Filter design | Hose-barb sizes | Rating | Included format |
|---|---|---|---|---|
| 033316-10 | Disposable inline fuel filter | 5/16 in | 10 micron | Complete disposable filter |
| 033317-10 | Disposable inline fuel filter | 3/8 in | 10 micron | Complete disposable filter |
| 033319-10 | Clear View universal inline filter kit | 1/4, 5/16, 3/8 in | 20 micron | Filter assembly and multiple barb sizes |
Manufacturer restriction to check
Moeller explicitly states this restriction for all three filter models in this comparison. Do not install them on an inboard-engine fuel system. Check the boat and engine manufacturer's specified filter type and safety requirements.
Before fitting a replacement, inspect the original fuel hose, clamps, filter mounting position and flow direction. Replace damaged hose or connections according to the engine manufacturer's instructions.
Compare the exact Moeller filter listings
Open the MPN to check the current listing details and availability.
Moeller 033316-10
The smaller-barb 10-micron disposable unit; compare the old hose with the 5/16-inch fittings.
Review listing and availability
Moeller 033317-10
The 3/8-inch-barb alternative to 033316-10; a similar clear body does not make the barbs interchangeable.
Review listing and availability
Moeller 033319-10
Identify this as a 20-micron universal filter kit rather than a 10-micron disposable single-barb unit.
Review listing and availabilityOther fuel-system identification guides
Identify Sierra inline fuel filters · Identify Moeller fuel tank senders
UsedRVParts offers viewing and pickup by appointment in Kelowna.