Sierra 18-6435

Upgrade Your Outboard with the Reliable Sierra 18-6435 Starter

Power up your marine adventures without hesitation using the Sierra 18-6435 starter from Sierra Engine Parts. Designed as a direct replacement for common outboard engine failures, this robust starter motor ensures quick, dependable cranking every time you hit the water. Whether you're dealing with a sluggish start on your 4-stroke outboard or need a fresh unit after heavy use, the 18-6435 delivers OEM-level performance at a fraction of the cost.

Crafted with precision engineering, this starter withstands the harsh marine environment—saltwater corrosion, vibration, and constant moisture—making it ideal for boaters who demand durability without compromise. Forget the frustration of dead batteries or faulty solenoids; install the Sierra 18-6435 and get back to smooth sailing.

Key Features of the Sierra 18-6435 Starter Motor

• High-Torque Design: Provides superior cranking power for reliable engine starts, even in cold conditions or with partially charged batteries.
• Corrosion-Resistant Construction: Zinc-plated housing and sealed components protect against saltwater exposure and electrolysis.
• Integrated Solenoid: Ensures seamless engagement and disengagement, reducing wear on gears and extending service life.
• Precision Gears and Bearings: Smooth operation with minimal noise, backed by quality materials that resist stripping under load.
• Direct Bolt-On Fit: Matches factory specifications for hassle-free installation—no modifications required.

These features make the Sierra 18-6435 a standout choice for marine enthusiasts looking to maintain peak engine performance.

Perfect Compatibility for Popular Outboard Engines

The Sierra 18-6435 starter is engineered to fit a wide range of Mercury and compatible outboard models, particularly 90-115 HP 4-cylinder engines from the mid-1990s onward. It's a go-to replacement for OEM part numbers like Mercury 50-811887T, ensuring you get the exact match without guesswork.

Before installation, double-check your engine's serial number against compatibility charts from Sierra or your service manual. This starter shines in both freshwater and saltwater applications, supporting everything from center consoles to offshore fishing rigs.

Why Boaters Trust Sierra Engine Parts Starters

Sierra has built a reputation for affordable, high-quality aftermarket marine parts that rival factory originals. The 18-6435 starter undergoes rigorous testing for electrical draw, heat dissipation, and longevity, often outlasting stock units in real-world use. Boaters report fewer breakdowns and easier winter storage thanks to its sealed design.

Investing in this starter means fewer trips to the mechanic and more time on the water. It's not just a part—it's peace of mind for your vessel's propulsion system.

Simple Installation and Maintenance Tips

Swapping out your old starter for the Sierra 18-6435 takes about 30-60 minutes with basic tools: wrenches, a socket set, and possibly a battery disconnect. Disconnect the battery first, remove the old unit by unbolting the mounting flange and wiring harness, then reverse the process. Torque specs are typically 15-20 ft-lbs—always consult your engine manual.

Pro Maintenance Advice:

• Inspect wiring harnesses for frays or corrosion annually.
• Apply dielectric grease to terminals for better conductivity.
• Test battery voltage (minimum 12.6V) before blaming the starter.
• Flush with freshwater after saltwater runs to prevent buildup.

Follow these steps, and your Sierra starter will serve reliably for seasons to come.

Frequently Asked Questions