Johnson-Evinrude Replacement Lower Unit | 1.85 | LH | Magnum Units) | 90-318-A
Overview & Technical Specs
| Product Overview | |
|---|---|
| Fits | Johnson-Evinrude |
| OEM Part # | 5007670 |
| Unit Type | Lower Unit |
| Warranty | 3 Year Fault Free Warranty |
| Weight | 55.0 lb |
| Item Condition | New |
| Technical Specifications | |
| Gear Ratio | 1.85 |
| Rotation | Counter |
| Shaft Length | 2 Piece (separate) |
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Description
Replacement Lower Unit — Johnson/Evinrude® Magnum & Magnum II (Mag II)
Quality aftermarket gearcase designed as a direct replacement for Magnum II (Mag II) lower units used on select Johnson/Evinrude® outboards. Built to match factory fit and function.
Compatibility Notes
- Direct bolt-on replacement for Magnum II (Mag II).
- If replacing the original Magnum (first generation), you must remove the alignment pins from the new lower unit during installation.
Finish
- Black only (no other colors offered).
What’s Not Included
- Upper drive shaft
- Shift shaft
- Water pump
- Water-intake screens
Important Water Pump Kit Info (3.4L Engines)
Our 90-306-01K water pump kit is not a direct replacement for 3.4L engines. The correct kit is OE# 5007972 (available from Evinrude).
If you choose to use 90-306-01K on a 3.4L, complete the following adjustments:
- Do not install the water-tube grommet in the housing.
- Reuse the O-rings from your original water tube.
- Reuse the water-pump housing cover (the plastic tube attached with two screws).
Installation Tips
- Always confirm application by model and serial number before ordering.
- Use OEM-spec gear lube and a new gasket/seal kit at install.





