Sierra 18-5003 Ignition Tune-Up Kit, Replaces 172806, for Johnson/Evinrude 9.9, 15, 35, 40 HP and 40 Comm Outboards

The Sierra 18-5003 Tune-Up Kit is a complete ignition service kit for select Johnson/Evinrude outboard engines, bundling the two electrical components most commonly replaced during a routine tune-up: condensers and contact sets. Each kit contains two Sierra 18-5205 condensers (cross-referenced to OEM number 581419) and two Sierra 18-5141 contact sets, giving a technician or DIY boater everything needed to service both ignition points in one purchase instead of sourcing condensers and contact sets separately.

The kit is designed for Johnson/Evinrude 9.9 HP, 15 HP, 35 HP, 40 HP, and 40 Comm outboard engines, and it replaces the original Johnson/Evinrude tune-up kit numbered 172806. Because fit is specific to these engine and horsepower designations, confirming the OEM number against your outboard before ordering is recommended. Sierra manufactures each component in the kit to meet or exceed the performance of the original equipment part it replaces, so ignition timing and spark quality after installation match what the OEM kit delivered when new.

At 0.1 pounds, the kit ships as a compact parts set rather than a bulky assembly, making it easy to keep as a spare aboard the boat or in a service kit for scheduled maintenance.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5003
• Replaces (OEM): 172806
• Kit Contents: (2) Sierra 18-5205 Condensers, (2) Sierra 18-5141 Contact Sets
• Condenser OEM Number: 581419
• Fitment: Johnson/Evinrude 9.9 HP, 15 HP, 35 HP, 40 HP, 40 Comm outboard engines
• UPC: 030999318251
• Weight: 0.1 pounds

Fitment

• Johnson/Evinrude 9.9 HP outboard engines
• Johnson/Evinrude 15 HP outboard engines
• Johnson/Evinrude 35 HP outboard engines
• Johnson/Evinrude 40 HP outboard engines
• Johnson/Evinrude 40 Comm outboard engines

Replaces (OEM)

• 172806

Frequently Asked Questions

Which outboard engines is the Sierra 18-5003 tune-up kit designed for? The 18-5003 kit is designed for Johnson/Evinrude 9.9 HP, 15 HP, 35 HP, 40 HP, and 40 Comm outboard engines.

What does the Sierra 18-5003 tune-up kit include? Each 18-5003 kit contains two Sierra 18-5205 condensers and two Sierra 18-5141 contact sets, covering both ignition components needed for a full tune-up in one package.

What OEM part number does the Sierra 18-5003 replace? It replaces Johnson/Evinrude OEM part number 172806.

Is the condenser in this kit a genuine Sierra part? Yes, the condensers included in the 18-5003 kit are genuine Sierra 18-5205 condensers, cross-referenced to OEM number 581419.

How many contact sets and condensers come in one 18-5003 kit? Two of each: (2) Sierra 18-5141 contact sets and (2) Sierra 18-5205 condensers, enough to service both ignition points on the applicable outboard.

Will the 18-5003 kit fit a 25 HP or 50 HP Johnson/Evinrude outboard? No, the 18-5003 kit is fit-specific to 9.9 HP, 15 HP, 35 HP, 40 HP, and 40 Comm Johnson/Evinrude engines, so a 25 HP or 50 HP model is not covered; check part numbers before ordering.

Does the Sierra 18-5003 kit meet OEM performance standards? Yes, Sierra builds the 18-5003 kit's components to meet or exceed the original equipment tune-up kit (172806) it replaces.

What is the weight of the Sierra 18-5003 tune-up kit? The 18-5003 tune-up kit weighs 0.1 pounds.

When would I need to install the 18-5003 tune-up kit? The condensers and contact sets in the 18-5003 kit are standard ignition wear items replaced during a routine outboard tune-up on the applicable Johnson/Evinrude engines.

What is the UPC for the Sierra 18-5003 kit? The UPC for the Sierra 18-5003 tune-up kit is 030999318251.

Does the part number matter when ordering a tune-up kit for these engines? Yes, the 18-5003 kit corresponds specifically to OEM number 172806 for Johnson/Evinrude 9.9, 15, 35, 40 HP, and 40 Comm engines, so matching the part number ensures the correct condensers and contact sets for your engine.