APPLICATION--- Fits for Most Mercury/Marine/Force/Yamaha 2-stroke outboards 50hp and up (excluding Verado) with 1 1/2"-16 TPI threads
 
Directly Replace--- Replacement for Mercury part # 91-904551; Replacement for Sierra Part number: 18-9896; MT0022
High Quality--- Made of high hardened 4140 impact grade steel,with silver oxide coating which is rust-resistance and durable to use.Better than OEM.
Using Methods: Use directly on Mercury and Older outboards with 1.5"x16 threaded flywheel. Use with MT0024 for Mercury Verado Use with MT0025 for Yamaha 5.3, 4.2 and New F125B and F200B.