Sierra 18-6774 Trim Motor 3Ram 3Wire 811628
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Sierra 18-6774 Trim Motor 3Ram 3Wire 811628 Product Description
Upgrading or replacing the trim motor on your outboard can breathe new life into your boat's power trim and tilt system. The Sierra 18-6774 trim motor, designed for 3-ram setups with a 3-wire configuration, delivers reliable performance that matches or exceeds original equipment standards. Boat owners often turn to this motor when dealing with sluggish trimming, unusual noises, or complete failure in their hydraulic systems, ensuring smooth operation whether you're launching, trailering, or fine-tuning your propeller angle on the water.
What sets this apart is its robust construction built to withstand the harsh marine environment—saltwater corrosion, constant vibration, and heavy loads from rams lifting the engine. It's a direct-fit replacement that restores factory-like response, helping you maintain control and safety during every outing.
Key Features and Specifications
- Durable Housing: Sealed to resist water intrusion and corrosion, ideal for both freshwater and saltwater use.
- 3-Wire Design: Compatible with standard 3-ram power trim systems, simplifying wiring without modifications.
- High-Torque Output: Provides the muscle needed for quick, effortless trimming even on heavier outboards.
- Precision Engineering: Matches OEM dimensions and mounting points for a seamless bolt-on installation.
- Thermal Protection: Built-in safeguards prevent overheating during extended use, extending motor lifespan.
These features make it a go-to choice for DIY boaters and professional mechanics alike, offering peace of mind on the water.
Compatibility and Fitment
This trim motor fits a wide range of outboard engines equipped with 3-ram trim systems. It's engineered as a precise replacement for common setups found on popular brands, ensuring it integrates perfectly with your existing hydraulic rams and control box. Before installation, verify your system's wire count and ram configuration—3 rams and 3 wires are the hallmarks here.
Pro Tip: Cross-check with your engine's service manual or inspect the current motor's mounting pattern. This motor shines in applications where reliability under load is critical, from fishing skiffs to larger center consoles.
Step-by-Step Installation Guide
Installing a new trim motor is straightforward with basic tools and mechanical know-how. Here's a general walkthrough to get you back on the water fast:
- Preparation: Disconnect the battery, tilt the engine fully down, and relieve hydraulic pressure by opening the reservoir valve.
- Removal: Unbolt the old motor from the transom bracket, disconnect the 3 wires (note colors for reconnection), and detach hydraulic hoses carefully to avoid spills.
- Mount New Motor: Align the Sierra 18-6774 with the mounting holes, secure with original bolts, and reconnect hoses using new seals if available.
- Wiring: Match wires by color or function (typically power, ground, and signal), then cycle the system manually to bleed air.
- Testing: Reconnect battery, test up/down functions slowly, and check for leaks or binding.
Expect 1-2 hours for the job. Always wear safety gear and work in a stable, level area to avoid injury.
Maintenance Tips for Longevity
To maximize the life of your trim motor, incorporate these habits into your routine:
- Rinse with freshwater after saltwater exposure to flush corrosive residues.
- Inspect wiring and connections seasonally for fraying or corrosion.
- Check hydraulic fluid levels and top off with manufacturer-recommended type.
- Avoid overriding the trim limits to prevent strain on the motor.
- Listen for early warning signs like grinding or slow response, addressing them promptly.
Regular care can extend service intervals, saving you time and hassle during peak boating season.
Common Issues and Fixes
Even reliable motors encounter problems. Here's how to diagnose and resolve:
| Symptom | Possible Cause | Solution |
|---|---|---|
| Motor won't run | Blown fuse or bad relay | Check fuse box and test relay continuity |
| Slow trimming | Low hydraulic fluid or air in lines | Bleed system and refill reservoir |
| Grinding noise | Worn gears or binding rams | Inspect rams for straightness and lubricate |
| Erratic operation | Corroded wires | Clean terminals and apply dielectric grease |
If issues persist, consult a certified marine technician to avoid further damage.
Why Trust Sierra Replacements
Sierra has built a reputation for affordable, high-quality aftermarket marine parts that meet stringent OEM specs. This trim motor undergoes rigorous testing for fit, function, and durability, giving you confidence without the premium price tag. Boaters rave about its consistent performance and easy availability, making it a staple in garages worldwide.
Frequently Asked Questions
What is the Sierra 18-6774 trim motor used for?
It's a replacement power trim and tilt motor for outboard engines with 3-ram hydraulic systems and 3-wire controls, handling up/down movement efficiently.
Does this motor fit Mercury outboards?
Yes, it serves as a direct replacement for many Mercury models with matching 3-ram setups, but always confirm your engine's specs.
How do I know if my trim system is 3-ram 3-wire?
Count the hydraulic cylinders (rams) on your transom and check the motor's wiring harness for three wires.
Can I install this myself?
Absolutely, with basic tools and following safety protocols. It's a bolt-on part that typically takes under two hours.
What maintenance does the trim motor need?
Rinse after saltwater use, check fluid levels, inspect wires, and test operation regularly to catch issues early.
Why is my trim motor making noise?
Common causes include low fluid, air in lines, or worn components. Bleed the system and inspect rams first.
Is this motor waterproof?
It's sealed against water intrusion but not submersible. Protect wiring and keep it dry during operation.
Save $89 when you buy the Sierra 18-6774 Trim Motor 3Ram 3Wire 811628 for only $294 from NVN Marine! Same day shipping before 3pm.
Sierra 18-6774 Trim Motor 3Ram 3Wire 811628 Technical Specifications
| Type: | |
|---|---|
| Vendor: |
Sierra Engine Parts |
| Weight: |
4.87 lb |
Sierra 18-6774 Trim Motor 3Ram 3Wire 811628 User Reviews
Sierra 18-6774 Trim Motor 3Ram 3Wire 811628 Shipping & Return
| Shipping Weight: |
4.87 lb |
|---|---|
| Box Sizes: |
5.00 (h) x 6.00 (w) x 11.00 (l) |
| Cubic Feet: |
330.0 |
| Returnable: |
Yes |
For detailed shipping policy please check our Shipping Policy and you can find our Return and Refund Policy here.