Sierra Spanner Nut

Sierra 18-3751 Spanner Nut for Mercury & Mercruiser Engines

For IA/IB/IC & EZ Shift, MC-I, R, MR, Alpha One, Gen II, Vazer, TRS, Bravo I & IX

Interchangeable with:

GLM

21120

Mallory

9-72155

Mercruiser Stern Drive

79448

52834

35912

Mercury Marine

8M2011027

79448