Sierra 18-6273-1 Tilt/Trim Motor
Sierra 18-6273-1 Tilt/Trim Motor — Product description
Upgrade your outboard motor's power trim and tilt system with the reliable Sierra 18-6273-1 tilt/trim motor. Designed as a direct replacement for common marine engine applications, this motor delivers smooth, consistent operation to keep you on the water without interruptions. Boat owners trust it for its durable construction that withstands harsh saltwater environments and heavy use during long fishing trips or leisurely cruises.
Key Features and Performance Advantages
- Precision Engineering: Built with high-quality brushes and windings for efficient power delivery and reduced wear over time.
- Corrosion-Resistant Housing: Zinc-plated components protect against rust, extending lifespan in marine conditions.
- Sealed Design: Prevents water intrusion, ensuring reliable starts even after submersion.
- Optimized Torque: Provides the lifting power needed for larger props and heavier boats without straining.
- Easy Integration: Matches OEM specifications for plug-and-play installation, minimizing downtime.
Unlike stock motors that may fail prematurely under load, this Sierra unit incorporates reinforced gears for superior durability, helping you avoid costly hydraulic pump replacements.
Perfect Fit for Popular Outboard Brands
The Sierra 18-6273-1 serves as a versatile replacement across multiple outboard models. It's engineered to match the mounting dimensions, electrical connectors, and shaft sizes of leading manufacturers, ensuring seamless compatibility. Before installing, verify your setup by checking the motor's voltage rating and pin configuration against your service manual—common cross-references include motors used in 40-150 HP ranges from the 1980s onward.
| Brand | Common Models | Replaces OEM Part |
|---|---|---|
| Mercury/Mariner | 40-125 HP (1980s-2000s) | Various trim motors |
| OMC/Johnson/Evinrude | 48-150 HP | OMC trim assemblies |
| Yamaha | Select 40-90 HP | Compatible tilt units |
Note: Always cross-check with your engine's serial number for exact fitment.
Step-by-Step Installation Tips for DIY Success
- Disconnect Power: Remove the battery cables to prevent electrical shorts.
- Access the Motor: Jack up the outboard and detach the trim ram linkages.
- Unbolt Old Motor: Typically two or three bolts secure it—use penetrating oil if seized.
- Transfer Components: Reuse solenoid and wiring harness if compatible; inspect for corrosion.
- Mount New Motor: Align shafts precisely and torque bolts to spec (around 10-15 ft-lbs).
- Test Operation: Reconnect battery, cycle trim fully, and listen for smooth, quiet action.
Pro Tip: Grease the pivot points and check hydraulic fluid levels post-install to maximize performance. Most installs take under an hour with basic tools.
Maintenance and Troubleshooting for Longevity
Keep your tilt/trim motor running strong with simple habits: Rinse with fresh water after saltwater use, inspect electrical connections seasonally, and test full up/down travel monthly. Common issues like slow operation often stem from low hydraulic fluid or binding linkages—top off fluid and lubricate before blaming the motor.
If your trim fails intermittently:
- Check fuses and relays first.
- Measure voltage at the motor (should be 12V+).
- Inspect for stripped gears from overloading.
Regular care like this can double the motor's service life compared to neglected units.
Why Choose Sierra Over Other Aftermarket Options?
Sierra stands out in the marine aftermarket with rigorous testing that exceeds industry standards for vibration, heat, and submersion. Backed by decades of expertise, these parts deliver OEM-level performance at a fraction of dealer costs, without the markups. Boaters report fewer breakdowns and smoother resale value for engines equipped with Sierra components.
Frequently Asked Questions
What engines is the Sierra 18-6273-1 tilt/trim motor compatible with?
It's a direct fit for many Mercury/Mariner 40-125 HP, OMC/Johnson/Evinrude 48-150 HP, and select Yamaha models from the 1980s-2000s. Confirm via your engine's serial number.
How do I know if my tilt/trim motor needs replacement?
Signs include slow or jerky movement, unusual noises, failure to hold position, or no response. Test by bypassing the solenoid if possible.
Is installation difficult for beginners?
No, it's straightforward with basic tools. Disconnect power, unbolt the old unit, and bolt on the new one. Takes 30-60 minutes typically.
Can this motor handle saltwater use?
Yes, its corrosion-resistant build is ideal for brackish and saltwater environments. Rinse after use for best results.
What's the difference between tilt and trim motors?
Tilt motors handle full up/down (stow/trailering), while trim adjusts running angle. Many units like this one serve both functions.
Does it come with a warranty?
Sierra parts are covered by a standard manufacturer's warranty against defects—check details at purchase.
How can I prevent premature failure?
Avoid overloading the system, maintain hydraulic fluid, and lubricate linkages regularly.
SKU: NVN-4002899
MPN: 18-6273-1
UPC: 808282186883
Technical specifications
| Brand | Sierra Engine Parts |
| Model | Sierra 18-6273-1 Tilt/Trim Motor |
| SKU / MFR# | 4002899 |
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