Lock Nut for Yamaha F2.5 AMH / MLH / MSH / MHA (2003+) and 2 other supported applications. This fastener is used in cylinder head and valve train parts. Recorded OEM cross-references include 7FK-12158-00. Use PA166F-010011 to identify the offered item. Selection warning: Match the exact product code and OEM reference 7FK-12158-00 to the part being replaced. Confirm the full model, production details and serial range. Product details Product Lock Nut Product code PA166F-010011 Product type Fastener Compatible make Yamaha Primary application Yamaha F2.5 AMH / MLH / MSH / MHA (2003+) Assembly Cylinder head and valve train parts Key points Product type: Fastener Compatible make: Yamaha Application: Yamaha F2.5 AMH / MLH / MSH / MHA (2003+) OEM cross-reference: 7FK-12158-00 Compatibility and fitment Yamaha F2.5 AMH / MLH / MSH / MHA (2003+) Cylinder head and valve train parts Yamaha F4 Cylinder head and valve train parts Yamaha F4B / F5A / F6C Cylinder head and valve train parts Where model, year, serial, ratio, rotation, side or material varies, the exact selection details take priority over a broad model-family match. Part numbers and cross-references Offered product code PA166F-010011 OEM cross-reference 1 7FK-12158-00 OEM references are provided for identification. A cross-reference does not mean the item is supplied as a genuine OEM product. Before ordering Confirm the full engine, outboard or drive model. Check the product code and every relevant OEM reference. Apply any serial, year, ratio, rotation, side or material limit. Compare the replacement with the component being removed. Ask TMP Global to check the application if any identifier differs. Frequently asked questions What does PA166F-010011 replace? Recorded OEM cross-references include 7FK-12158-00. How do I confirm that PA166F-010011 is correct? Match the product code and OEM reference, then confirm the model, production details, serial range and assembly position. Do not select the part by appearance alone.