Yellow tip thread 3/8"-16 fits:

• Johnson
• Evinrude
• Mercury
• Mariner
• Mercruiser
• OMC
• OMC SX Cobra
• Volvo Penta SX

8 mm adapter fits:

• Honda
• Mercury 4-t (Japan)
• Tohatsu
• Yamaha

Sierra Part-No: 18-9781