Pinion Nut for Mercury Mariner 30, 40, 50, 60 HP (4 CYL) EFI / 40 CARB (3CYL). This fastener is used in gearcase gears, shafts and seals. Recorded OEM cross-references include 11-55910. Use REC313339 to identify the offered item. Selection warning: Match the exact product code and OEM reference 11-55910 to the part being replaced. Confirm the full model, production details and serial range. Product details Product Pinion Nut Product code REC313339 Product type Fastener Compatible make MerCruiser / Mercury / Mariner Primary application Mercury Mariner 30, 40, 50, 60 HP (4 CYL) EFI / 40 CARB (3CYL) Assembly Gearcase gears, shafts and seals Key points Product type: Fastener Compatible make: MerCruiser / Mercury / Mariner Application: Mercury Mariner 30, 40, 50, 60 HP (4 CYL) EFI / 40 CARB (3CYL) OEM cross-reference: 11-55910 Compatibility and fitment Mercury Mariner 30, 40, 50, 60 HP (4 CYL) EFI / 40 CARB (3CYL) Gearcase gears, shafts and seals 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 REC313339 OEM cross-reference 1 11-55910 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 REC313339 replace? Recorded OEM cross-references include 11-55910. How do I confirm that REC313339 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.