Sierra 18-5397 Marine Distributor Cap, Replaces Mercury Marine 815407A2, Fits Ford 2.3L with Mallory Distributor 1987-90

The Sierra 18-5397 Distributor Cap is a direct-fit replacement distributor cap engineered for marine ignition systems that use a Mallory-style distributor, specifically the Ford 2.3L engine with Mallory Distributor covering 1987-90 applications. It is built from metal with a machined exterior finish and a white cap body, and it uses a twist-on closure for a secure, weather-resistant seal at the distributor housing. As a Sierra Marine part, it is engineered to meet the demands of high horsepower marine engines and is built to stand up to the harsh marine environment, meeting or exceeding the performance of the original equipment part it replaces.

This cap is a straightforward tune-up and ignition-maintenance component, restoring a proper seal and secure electrical connection point for the distributor rotor and spark plug wires. It ships as a single Sierra 18-5397 Distributor Cap, ready to install in place of a worn, cracked, or corroded original cap.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5397
• Material: Metal
• Color: White
• Exterior Finish: Machined
• Closure Type: Twist-On
• Item Dimensions: 8 x 6 x 4 inches
• Weight: 0.22 pounds
• Fitment: Ford 2.3L with Mallory Distributor, 1987-90
• OEM Cross-Reference: Mercury Marine 815407A2, Mallory 9-29418, OMC 985218

Fitment

• Ford 2.3L with Mallory Distributor, 1987-90

Replaces (OEM)

• Mercury Marine 815407A2
• Mallory 9-29418
• OMC 985218

Frequently Asked Questions

What does the Sierra 18-5397 distributor cap fit? The Sierra 18-5397 Distributor Cap fits the Ford 2.3L engine equipped with a Mallory distributor, covering 1987-90 applications.

Is the Sierra 18-5397 a direct OEM replacement? Yes, the Sierra 18-5397 Distributor Cap directly replaces Mercury Marine 815407A2, Mallory 9-29418, and OMC 985218, so it installs in place of any of those original caps.

What material is the Sierra 18-5397 distributor cap made from? It is made from metal with a machined exterior finish and a white cap body, matching the construction of the original Mallory-style cap it replaces.

How does the cap attach to the distributor? The Sierra 18-5397 uses a twist-on closure, which locks the cap securely onto the distributor housing to keep out moisture and debris.

What are the dimensions of the Sierra 18-5397 distributor cap? The Sierra 18-5397 Distributor Cap measures 8 x 6 x 4 inches.

How much does the Sierra 18-5397 distributor cap weigh? It weighs 0.22 pounds.

What comes in the box with the Sierra 18-5397? The package includes one Sierra 18-5397 Distributor Cap.

Will the Mercury Marine 815407A2 cap work as a substitute for the Sierra 18-5397? Yes, Mercury Marine 815407A2 is one of the OEM numbers the Sierra 18-5397 Distributor Cap directly replaces, along with Mallory 9-29418 and OMC 985218.

Is the Sierra 18-5397 built for marine use specifically? Yes, the Sierra 18-5397 Distributor Cap is engineered to meet the demands of high horsepower marine engines and is built to hold up in the harsh marine environment.

Does the Sierra 18-5397 replace an OMC distributor cap? Yes, the Sierra 18-5397 Distributor Cap replaces OMC part number 985218.

When should this distributor cap be replaced? A cracked, corroded, or worn distributor cap should be replaced as part of routine ignition tune-up maintenance, and the Sierra 18-5397 is the direct-fit replacement for the Ford 2.3L Mallory distributor setup covered by this part.

Does the Sierra 18-5397 cross-reference to a Mallory part number? Yes, it replaces Mallory 9-29418.