Sierra 18-5003 Ignition Tune Up Kit 172806
Sierra 18-5003 Ignition Tune Up Kit 172806 — Product description
Revitalize Your Outboard Engine's Performance
Keep your boat running smoothly on the water with the Sierra 18-5003 Ignition Tune-Up Kit, designed as a direct replacement for OMC part 172806. This essential maintenance bundle targets the heart of your engine's ignition system, ensuring consistent spark delivery for reliable starts and optimal power output. Whether you're prepping for a weekend fishing trip or a long offshore adventure, a fresh tune-up prevents frustrating misfires and breakdowns.
Crafted with precision using high-grade materials, this kit withstands the harsh marine environment—saltwater corrosion, vibration, and heat—while delivering performance that rivals factory originals. Boat owners trust Sierra for its proven durability and value, making it a go-to choice for DIY mechanics and professional technicians alike.
What's Included in the Kit
- Points Set: Precision-aligned for accurate timing and long-lasting contact.
- Condenser: High-quality dielectric material to suppress arcing and extend points life.
- Rotor: Durable construction for efficient spark distribution.
Every component is rigorously tested to meet or exceed OEM specifications, so you get peace of mind without compromising quality.
Key Benefits for Your Boating Experience
- Improved Starting: Eliminates hard starts caused by worn ignition parts.
- Smoother Operation: Reduces hesitation and pinging for a more responsive throttle.
- Fuel Savings: Optimized combustion means better efficiency and lower costs per outing.
- Extended Engine Life: Prevents damage from erratic spark, protecting pistons and valves.
- Easy Maintenance: Bolt-on design fits seamlessly into routine service schedules.
Regular ignition tune-ups are like oil changes for your outboard—simple steps that yield big rewards in reliability and enjoyment.
Signs Your Ignition System Needs Attention
Spot these common symptoms early to avoid trailering your boat home:
- Engine cranks but won't fire up easily, especially when cold.
- Rough idling or surging at low speeds.
- Loss of power during acceleration or planing.
- Fouled spark plugs or black exhaust smoke.
- Intermittent stalling in gear.
Addressing these with the Sierra 18-5003 kit restores factory-fresh performance quickly and affordably.
Pro Tips for Installation and Maintenance
DIY Installation Steps:
- Disconnect the battery and remove the flywheel cover for access.
- Mark the distributor position before loosening the hold-down clamp.
- Replace points, condenser, and rotor—gap the points to spec using a feeler gauge.
- Realign timing with a test light or timing light for precision.
- Reassemble, reconnect, and test-run in a barrel or on the water.
Total time: Under an hour for experienced hands. Always consult your engine manual for model-specific dwell angles and gaps.
Maintenance Schedule: Inspect annually or every 100 hours of operation. In saltwater use, check more frequently to combat corrosion.
Frequently Asked Questions
What components are in the Sierra 18-5003 Ignition Tune-Up Kit?
The kit includes a points set, condenser, and rotor, all engineered for reliable ignition performance in compatible OMC outboards.
Does this kit replace OMC 172806?
Yes, the Sierra 18-5003 is a direct, high-quality replacement for OMC part number 172806, matching original specs.
Is installation straightforward for beginners?
Absolutely—basic tools like screwdrivers and a feeler gauge suffice. Follow a step-by-step guide, and it's a quick job.
How often should I replace the ignition tune-up kit?
Every 100 hours or annually, or sooner if you notice starting issues or rough running.
Will this kit improve fuel efficiency?
Yes, by ensuring proper spark timing and strength, it promotes complete combustion for better mileage.
Is Sierra as good as OEM parts?
Sierra parts meet or exceed OEM standards, offering comparable reliability at a fraction of the cost.
Can I use this kit on saltwater outboards?
Definitely—components are corrosion-resistant, ideal for marine conditions including saltwater exposure.
SKU: NVN-4002731
MPN: 18-5003
UPC: 030999318251
Technical specifications
| Brand | Sierra Engine Parts |
| Model | Sierra 18-5003 Ignition Tune Up Kit 172806 |
| SKU / MFR# | 4002731 |
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