Sierra 18-7098-1

Revitalize your Mercruiser engine's performance with this precision-engineered carburetor rebuild kit. Designed for boat owners who demand reliability on the water, this kit tackles common issues like rough idling, hesitation during acceleration, and poor fuel economy by restoring your carburetor to like-new condition. Whether you're prepping for a summer cruise or troubleshooting winter storage woes, this kit delivers the components needed for a smooth-running powerplant.

Key Components for a Complete Rebuild

Every element in this kit is selected for durability and exact fit, ensuring you spend less time wrenching and more time boating. You'll find high-quality gaskets, diaphragms, needles, seats, and floats crafted from materials resistant to ethanol-blended fuels—a must for modern marine environments. The accelerator pump components and idle mixture screws allow fine-tuning to match your engine's specific demands, while the power valve and choke parts ensure reliable cold starts even in chilly mornings.

• Gaskets and seals for leak-free operation
• Float and needle valve assembly for precise fuel metering
• Diaphragms and pump parts for responsive throttle response
• Idle and main jets for optimized air-fuel mixture
• Choke and linkage hardware for seamless startup

Perfect Fit for Popular Mercruiser Models

This kit aligns seamlessly with a range of Mercruiser inline and V8 engines, making it a go-to solution for Stern Drive and Inboard/Outboard setups. It's engineered to match OEM specifications, so you avoid the guesswork of mismatched parts. Boaters with classic 4-cylinder or 8-cylinder configurations report plug-and-play installation, minimizing downtime during routine maintenance seasons.

Performance Boosts You'll Notice on the Water

Installing this rebuild kit doesn't just fix problems—it elevates your engine's efficiency. Expect crisper throttle response, steadier idle at the dock, and better top-end power for planing with a full load. Fuel delivery is optimized to reduce waste, helping you stretch every tank further on long outings. Plus, with components built to withstand corrosion from saltwater exposure, your investment holds up season after season.

Step-by-Step Installation Insights

Tackle the rebuild with confidence using these pro tips. Start by safely disconnecting the fuel line and removing the carburetor bowl—always work in a well-ventilated area. Clean all passages thoroughly with carb cleaner to remove varnish buildup, then replace parts in sequence: install new gaskets first, followed by the float assembly, jets, and pump diaphragm. Adjust the float level precisely, reassemble, and sync the throttle linkage. A test run on the hose reveals any tweaks needed before hitting the water. For best results, pair with fresh fuel and a filter screen inspection.

1. Drain and remove the carburetor
2. Disassemble and deep-clean components
3. Install new kit parts per diagram (included)
4. Reinstall, adjust, and test

Long-Term Maintenance Strategies

To maximize the kit's lifespan, incorporate regular checks into your routine. Inspect for fuel varnish every 50 hours of operation, especially if using ethanol fuels—add a stabilizer to prevent buildup. Annually, verify float settings and linkage wear. This proactive approach keeps hesitation and flooding at bay, ensuring your Mercruiser fires up first pull every time.

Why Boaters Trust Sierra for Marine Engine Parts

Sierra stands out in the aftermarket world for its commitment to marine-grade quality at an accessible level. Each kit undergoes rigorous testing to meet or exceed original specs, backed by boaters who've relied on them for decades. It's not just a part; it's peace of mind for weekend warriors and serious anglers alike, proven across thousands of freshwater and saltwater applications.