Ignition Tune-Up Kit – Fits Johnson/Evinrude 18-40HP Outboards (Replaces 172523)

$29.99

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You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

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Delivery and Shipping

Free standard shipping on all orders under 1 KG

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This Ignition Tune-Up Kit provides essential components to restore the ignition system on Johnson/Evinrude 18–40HP, 2-stroke outboard engines manufactured between 1962 and 1976. It is engineered as a direct-fit replacement for original factory parts, ensuring reliable performance and straightforward installation.

It directly replaces OEM part numbers 0172523, 172523, and the superseded 777681. It also serves as an interchange for Sierra Marine 18-5002, Mallory Marine 9-29333, GLM 72820, and EMP 300-05002.

Installs as a direct replacement for the original components.
Kit includes two contact sets and two condensers for a complete service.
Covered by a standard manufacturer warranty for peace of mind.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number	Superseded From
OMC	172523	777681
OMC	0172523
Sierra Marine	18-5002
Sierra Marine	18-5002D
Mallory Marine	9-29333
GLM	72820
EMP	300-05002

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This kit is designed for a range of Johnson and Evinrude 2-stroke outboards.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.
Johnson/Evinrude	Various	18	2-Stroke	1962–1973	172523
Johnson/Evinrude	Various	20	2-Stroke	1962–1973	172523
Johnson/Evinrude	Various	25	2-Stroke	1969–1976	172523
Johnson/Evinrude	Various	28	2-Stroke	1962–1964	172523
Johnson/Evinrude	Various	33	2-Stroke	1965–1970	172523
Johnson/Evinrude	Various	40	2-Stroke	1962–1973	172523

Technical Specs

Product Type: Ignition Tune-Up Kit
Installation: Direct replacement
Fuel Type: Gasoline
Dimensions: 7.13 in (H) x 6.0 in (W) x 0.75 in (L)
Weight: 0.22 kg (0.48 lb)
Warranty: Standard manufacturer warranty

What’s in the Box

2 x Contact Set (Replaces 0580148)
2 x Condenser (Replaces 0581419)

Installation Notes

Disconnect the battery and spark plug wires for safety.
Remove the engine cover and flywheel to access the stator plate where the ignition components are mounted.
Carefully note the wiring connections before removing the old condensers and contact sets.
Install the new condensers first, followed by the new contact sets.
Set the ignition point gap according to your engine's service manual specifications (typically around 0.020").
Ensure all wires are securely connected and routed away from moving parts.
Reinstall the flywheel, torque the flywheel nut to spec, and reconnect the spark plug wires and battery.
Start the engine and check for proper operation.

Troubleshooting & FAQ

How do I know if my ignition system needs this kit?

Common signs of failing points and condensers include difficulty starting, engine misfires (especially at high RPM), rough idling, backfiring, or a complete loss of spark. If you observe these symptoms and your engine falls within the compatible models, this kit is likely the solution.

What is the correct point gap for these contact sets?

The standard ignition point gap for these Johnson/Evinrude engines is typically 0.020 inches. However, always consult your model-specific service manual to confirm the exact specification, as minor variations can exist.

How often should I replace my points and condensers?

For preventative maintenance, it's good practice to inspect and/or replace ignition points and condensers every 1-2 seasons or every 100-200 hours of operation, depending on use and operating conditions. Regular checks will ensure reliable starting and performance.

My engine model is listed, but my original part looks slightly different. Will this fit?

Please double-check the part numbers listed in the matrix against your service manual. While this kit is designed for a wide range of models, subtle mid-year changes can occur. If your part differs visually, verify the OEM part number before ordering.

Is any special grease needed for installation?

Yes, a small amount of cam lubricant or dielectric grease should be applied to the rubbing block on the new contact sets. This reduces friction and wear against the cam lobe on the crankshaft, extending the life of the points.

What is the difference between this kit and the original OEM parts?

This is an aftermarket kit designed to meet or exceed original equipment manufacturer (OEM) specifications for fit, form, and function. The primary difference is the brand and price point. Our components use comparable materials and are manufactured in ISO-certified facilities.

Is this a complete ignition rebuild kit?

This is a "tune-up" kit, containing the most common wear items: the points (contact sets) and condensers. It does not include ignition coils, spark plug wires, or the stator plate, which should be inspected separately.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns

Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.

Safety & Important Info

Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
This is an aftermarket replacement, not an OEM component.
Professional installation is recommended for safety and performance.

About Sea Sierra

Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.

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