SE 316 1.85 Replaces Johnson Evinrude Magnum Units
Introduction
If you’re seeking a premium replacement for your Johnson Evinrude Magnum lower unit, the SE 316 1.85 is a reliable, performance-driven solution tailored for demanding marine environments. Designed to fit Magnum applications seamlessly, this lower unit ensures smooth handling, enhanced durability, and compatibility with 1.85 gear ratios. Whether you’re a recreational boater or a marine technician, upgrading to the SE 316 marine replacement unit means fewer breakdowns and long-lasting performance offshore.
The SE 316 1.85 is specifically engineered to provide robust gear strength, corrosion resistance, and precision-fit alignment with Johnson Evinrude outboards. Built to OEM specs, it’s a go-to choice for restoring optimal thrust, RPM efficiency, and directional stability.
Overview / What Is SE 316 1.85?
The SE 316 1.85 is a standard rotation lower unit replacement that fits many Johnson and Evinrude outboard motors. It’s designed to replace OEM Magnum lower units with a 1.85 gear ratio and includes a new water pump and shift shaft assembly. Ideal for 90s and early 2000s 150–225 HP engines, it supports direct bolt-on functionality and superior marine-grade internal parts.
This replacement unit is factory pressure-tested, built with high-quality gears, and includes a standard propeller shaft. The SE 316 marine unit is compatible with V6 models and is a cost-effective alternative to OEM parts that often cost twice as much.
Applications and Compatibility
The SE 316 1.85 Replaces Johnson Evinrude Magnum Units across a wide range of outboard models. This includes:
- 150 HP to 225 HP Johnson/Evinrude outboards (years 1991–2006)
- Standard rotation Magnum lower units
- Outboards requiring a 1.85:1 gear ratio
Installation is straightforward, and no modifications are needed. The unit accepts OEM-style propellers and is backed by manufacturer warranties.
How to Install SE 316 1.85 Lower Unit
Installing the SE 316 1.85 is a manageable process for experienced boat owners or certified marine mechanics. Here’s a simplified step-by-step installation guide:
- Ensure the motor is turned off and the boat is out of the water.
- Disconnect the battery and shift cable linkage.
- Remove the old lower unit bolts and drop the existing unit.
- Align the drive shaft, shift shaft, and water tube when installing the SE 316 unit.
- Tighten mounting bolts evenly and reconnect shift linkage.
- Install the propeller and torque to factory specs.
Make sure to grease the splines and check the water pump impeller during installation. Refer to your engine’s service manual for torque specifications.
Maintenance Tips
To extend the lifespan of your SE 316 1.85 lower unit, regular maintenance is essential. Here are best practices:
- Gear Oil Change: Replace gear oil every 100 hours or annually.
- Inspect Propeller: Remove and clean the prop shaft regularly to prevent fishing line damage.
- Check Water Pump: Replace impeller every 2 seasons to ensure efficient cooling.
- Corrosion Prevention: Rinse with fresh water after each use and inspect zinc anodes.
Routine servicing will ensure smooth operation and help detect early signs of wear or seal damage in your SE 316 marine lower unit.
Common Troubleshooting Tips
Experiencing issues with your SE 316 1.85? Here are some common signs and how to fix them:
- No forward or reverse: Check shift rod adjustment and ensure linkage is connected properly.
- Grinding noises: May indicate worn gears or incorrect gear oil. Inspect and replace as needed.
- Overheating: Check impeller or cooling water intake blockage.
- Water in gear oil: Indicates a faulty seal. Replace all seals and pressure test.
Quick identification and repair can avoid costly rebuilds and downtime.
Expert Advice and Pro Recommendations
Professional marine technicians often recommend the SE 316 1.85 due to its OEM compatibility and cost-effective performance. It’s an excellent choice for those looking to extend engine life without breaking the bank. If you operate in saltwater, additional zincs and frequent flushing are recommended.
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SE 316 Cost and Durability
Compared to OEM units that can cost over $2,000, the SE 316 1.85 delivers equal or better performance at a much lower cost. Pricing varies from $950–$1,200, with a 3-year warranty on non-commercial use.
Durability is on par with OEM standards due to hardened gears, heat-treated shafts, and marine-sealed housing, making the SE 316 marine unit a reliable long-term investment.
Detailed FAQ Section
Is the SE 316 1.85 compatible with my Evinrude 200 HP outboard?
Yes, the SE 316 1.85 is compatible with Evinrude and Johnson outboards from 150 HP to 225 HP that originally used a Magnum lower unit with a 1.85 gear ratio. Be sure to verify the model year and gear ratio to ensure full compatibility. If unsure, refer to your original parts manual or contact the expert support team at All Boat Supplies with your engine serial number for confirmation.
How long does it take to install the SE 316 lower unit?
For professionals, installation typically takes 1 to 2 hours. DIY boaters with experience can expect 2 to 3 hours. The unit is designed for plug-and-play installation, which includes the shift shaft and water pump already pre-installed. Always refer to the manual and use appropriate marine grease and torque specifications for best results.
What is included in the SE 316 1.85 package?
The SE 316 lower unit package comes with:
- Pre-installed water pump kit
- Shift shaft
- Complete assembled housing
- New seals and o-rings
Propeller, gear oil, and installation hardware are typically not included, so prepare those separately.
What is the warranty policy?
The SE 316 1.85 comes with a 3-year limited warranty for recreational use. Commercial users typically get 90 days. The warranty covers manufacturer defects and premature failure, excluding damage from improper installation or impact-related incidents. For full details, refer to the manufacturer’s warranty policy or contact the seller directly.
How to identify if my current unit is a Magnum with a 1.85 ratio?
You can verify by checking your outboard model number and consulting your owner’s manual. Additionally, a stamped number on the existing gear housing often denotes the gear ratio. If the gear ratio is 1.85:1 and it is a standard (not counter) rotation unit, you likely have a Magnum model. If in doubt, reach out to the All Boat Supplies team for verification support.
Conclusion
The SE 316 1.85 marine replacement unit is a solid investment for Johnson and Evinrude outboard owners needing to replace aging Magnum lower units. With OEM-grade parts, easy installation, and robust warranties, it’s a leading choice for both cost-efficiency and long-term reliability. For optimal performance, follow installation and maintenance guidelines strictly.
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For more helpful marine maintenance guides, check out our article on Skeg Guard For SE316 and SE318 Lower Units.