If you are replacing an older outboard fuel hose, the primer bulb alone is not enough to identify it. Check the hose inside diameter, the style of the engine coupling, and whether the original tank adaptor is separate. Sierra 18-8013EP-2, 18-8016EP-2 and 18-8017EP-2 have distinct connection arrangements.
Three different ways the ends can be configured
Simple hose identification symbols, not a dimensional product or connector diagram. Refer to the matching product photographs and original connectors.
Identify an unknown Sierra hose assembly
- Photograph the engine- and tank-side connectors before removing the old line.
- Read any Sierra part number and the hose marking, including 5/16- or 3/8-inch inside diameter.
- Check whether the old line has the Mercury/Mariner double-sealed tank-side style, the Yamaha-specific arrangement, or plain hose requiring separate fittings.
- Compare the primer bulb and fitting seals, and identify any separate tank adaptor rather than assuming it is inside the package.
- Match your exact outboard model and original connection before installing fuel components; seek marine service assistance when uncertain.
Compare hose diameter and end connection
| Sierra MPN | Purpose | Hose ID | Length | Fittings |
|---|---|---|---|---|
| 18-8013EP-2 | Universal / fittings required | 5/16 in (7.9 mm) | 8 ft (2.4 m) | Separate end fittings needed |
| 18-8016EP-2 | Selected Mercury/Mariner applications | 3/8 in (9.5 mm) | 8 ft (2.4 m) | Double-sealed tank-side connection, clip-on engine end; separate tank adaptor may be needed |
| 18-8017EP-2 | Selected Yamaha applications | 3/8 in (9.5 mm) | 8 ft (2.4 m) | Sierra 18-8076 fuel-line connectors; separate tank adaptor may be needed |
Sierra lists premium fuel hose with polyester-braid reinforcement, a CPE outer cover and flexible THV barrier layer. Confirm fuel-system compatibility and exact connector geometry independently.
Compare the three corresponding store listings
Use the product photographs to compare the existing connectors, then check the UsedRVParts listing for condition and availability.
Related marine fuel information
Need to choose a portable tank or basic Attwood primer-bulb hose? Compare fuel tank sizes and hose options in our Attwood guide.
UsedRVParts viewing and pickup are by appointment in Kelowna. Check each product listing for stated condition.