Bearing for MerCruiser | 31-21739

Bearing for Mercury Mariner 30, 40, 50, 60 HP (4 CYL) EFI / 40 CARB (3CYL). This bearing is used in gearcase gears, shafts and seals. Recorded OEM cross-references include 31-21739. Use REC31-21739 to identify the offered item.

Selection warning: Match the exact product code and OEM reference 31-21739 to the part being replaced. Confirm the full model, production details and serial range.

Product details

Key points

• Product type: Bearing
• Compatible make: MerCruiser / Mercury / Mariner
• Application: Mercury Mariner 30, 40, 50, 60 HP (4 CYL) EFI / 40 CARB (3CYL)
• OEM cross-reference: 31-21739

Compatibility and fitment

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

OEM references are provided for identification. A cross-reference does not mean the item is supplied as a genuine OEM product.

Before ordering

1. Confirm the full engine, outboard or drive model.
2. Check the product code and every relevant OEM reference.
3. Apply any serial, year, ratio, rotation, side or material limit.
4. Compare the replacement with the component being removed.
5. Ask TMP Global to check the application if any identifier differs.

Frequently asked questions

What does REC31-21739 replace?

Recorded OEM cross-references include 31-21739.

How do I confirm that REC31-21739 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.