Sierra 18-5428 Rotor Volvo (Bosch)Volvo 243903
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Sierra 18-5428 Rotor Volvo (Bosch)Volvo 243903 Product Description
Keep your Volvo Penta engine firing smoothly on the water with the reliable Sierra 18-5428 distributor rotor. Designed as a direct replacement for the Bosch-style rotor under OEM number 243903, this precision-engineered part ensures consistent spark distribution, helping prevent misfires and rough idling that can cut your boating time short. Whether you're prepping for a long offshore trip or routine maintenance, this rotor delivers the durability marine enthusiasts demand.
Key Features and Performance Advantages
- Exact Fitment: Matches the specifications of the original Volvo Bosch rotor (243903), installing seamlessly without modifications for hassle-free swaps.
- High-Quality Materials: Crafted from robust, heat-resistant polymers and metals to withstand the harsh marine environment, including saltwater exposure and high RPM vibrations.
- Improved Ignition Reliability: Precision-molded vanes promote even spark timing, reducing carbon tracking and extending the life of your ignition system.
- Cost-Effective Upgrade: Sierra's aftermarket expertise means OEM-level performance at a fraction of dealer costs, without sacrificing quality.
Boat owners report fewer breakdowns and smoother operation after replacement, especially in older Volvo Penta models prone to rotor wear from moisture ingress.
Perfect Compatibility for Volvo Penta Engines
This rotor fits a range of Volvo Penta inboard and sterndrive applications using Bosch distributors. Commonly found in AQ, BB, TD, and MD series engines, it's ideal for models from the 1980s through early 2000s. Always cross-reference with your engine's service manual to confirm, as variations exist based on carbureted or fuel-injected setups.
Common Applications:
- Volvo Penta AQ131, AQ151
- BB140, BB165
- TD60, TD70
- And select MD models with Bosch ignition
Pro tip: Pair it with a fresh cap and wires for a complete ignition refresh that restores like-new power delivery.
Simple DIY Installation Steps
Replacing your worn rotor takes under 30 minutes with basic tools. Here's a straightforward guide:
- Disconnect the battery and remove the distributor cap by releasing the spring clips.
- Pull the old rotor straight up; note any resistance from carbon buildup and clean the shaft.
- Align the new Sierra 18-5428 rotor's tab with the distributor shaft slot and press firmly into place.
- Reinstall the cap, ensuring leads are secure, then reconnect the battery and test fire the engine.
- Check timing if needed using a light for optimal performance.
A common pitfall? Forgetting to ground yourself to avoid static damage to the rotor. Use an anti-static wrist strap for best results.
Maintenance Tips to Maximize Rotor Lifespan
To get the most from your Sierra 18-5428:
- Inspect annually or every 100 hours of operation for cracks, wear, or discoloration.
- Keep the distributor dry with dielectric grease on contacts to fend off corrosion.
- Monitor for symptoms like hesitation under load or hard starting, which signal rotor replacement time.
- Combine with plug and wire service for comprehensive ignition health.
Regular care like this can prevent costly tow-ins and keep your Volvo running strong season after season.
Why Trust Sierra Engine Parts?
Sierra has built a reputation among boaters for OEM-equivalent parts that exceed expectations. Unlike generic imports, Sierra rotors undergo rigorous testing for marine-specific stresses, ensuring they handle the unique demands of saltwater boating. Backed by decades of industry know-how, it's the smart choice for reliable, no-fuss replacements.
Frequently Asked Questions
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Sierra 18-5428 Rotor Volvo (Bosch)Volvo 243903 Technical Specifications
| Type: | |
|---|---|
| Vendor: |
Sierra Engine Parts |
| Weight: |
0.04 lb |
Sierra 18-5428 Rotor Volvo (Bosch)Volvo 243903 User Reviews
Sierra 18-5428 Rotor Volvo (Bosch)Volvo 243903 Shipping & Return
| Shipping Weight: |
0.04 lb |
|---|---|
| Box Sizes: |
0.00 (h) x 4.00 (w) x 5.00 (l) |
| Cubic Feet: |
0.0 |
| Returnable: |
Yes |
For detailed shipping policy please check our Shipping Policy and you can find our Return and Refund Policy here.