A loose fuel connector or leaking quick coupling should be identified from both halves, not only the colour of its housing. Compare the hose barb, tank thread and the original mating part. Sierra makes distinct Johnson/Evinrude and Suzuki/Tohatsu fittings; similar-looking connections are not automatically interchangeable.
Check these details on the removed fitting
Distinguish 5/16-inch from 3/8-inch fuel hose. The two sizes are not interchangeable just because a quick connector looks alike.
Inspect the latch, coupling and seal arrangement. Sierra names 18-8063 as the mating tank connector for 18-8056.
Match the original fitting and outboard part reference. A 1/4-inch NPT tank connector does not establish the correct hose-side mating part.
Identify fuel-system components with the engine off. Replace damaged fittings and seals and check for leaks according to the engine and tank manufacturer's service instructions.
A replacement checklist for older fittings
- Photograph the old connector and both mating faces before removing the fuel line.
- Measure the hose ID—5/16 inch and 3/8 inch cannot be distinguished reliably from photos alone.
- Identify a hose-side coupler versus the male tank fitting; inspect thread condition and any sealing surface.
- Check Sierra's OE interchange and stated mating part rather than choosing a connector by silver, black or brass colour.
- Install the correctly matched fuel parts with sound clamps and seals, and check for leaks before running the outboard.
Find the connector by part number and position
| Sierra part | Location | Size or thread | Listed family | Mating check |
|---|---|---|---|---|
| 18-8056 | Hose-side connection | 5/16 in hose | Johnson/Evinrude | Sierra lists 18-8063 as its mating tank connector |
| 18-8063 | Tank-side connection | 1/4 in male thread listed in store | Johnson/Evinrude | Mating connector stated for Sierra 18-8056 |
| 18-8092 | Hose-side connection | 3/8 in hose | Johnson/Evinrude | Check exact mating tank connector against the original system |
| 18-8062 | Fuel-line connection | 3/8 in hose barb | Suzuki and selected Chrysler/Force | Sierra lists 18-8071 as the mating connector |
| 18-8078 | Tank-side connection | 1/4 in male NPT | Suzuki / Nissan-Tohatsu | Sierra lists distinct OE cross-references; confirm the mating fuel-line end |
Size is the indicated hose inside diameter or threaded connection—not an instruction to substitute parts with the same measurement.
Compare part photos and original numbers
These exact part links help compare the removed connector with its catalog photograph; check each listing for condition and availability.
Identify the Johnson/Evinrude connection family
The 5/16-inch 18-8056 and 18-8063 are a manufacturer-listed mating pair. The 3/8-inch 18-8092 is a separate hose-size option; confirm the complete original connection.
Compare Suzuki-related fuel line and tank connectors
Sierra 18-8062 has a 3/8-inch barb and lists 18-8071 as its mate. Sierra 18-8078 is a 1/4-inch NPT male tank connector with different OE cross-references.
Related fuel-system guide
Need a complete primer-bulb fuel-line assembly? Compare Sierra fuel hoses and engine connections.
UsedRVParts product viewing and pickup in Kelowna are by appointment. Check the individual listing for condition.