Which part did you mean?
Sometimes different manufacturers use similar part numbers.
Which one of those listed below did you mean?| Crusader (31039) CRU31039 - CAP,VALVE W/SEAL 502 |
| Pleasurecraft Marine PCM (31039) PCM31039 - CAP,VALVE W/SEAL 502 NLA |
| Mercury Marine (31039) RETAINER ,NLA 31039 |