Magneto Mounting Screw for Legacy Briggs Engines

Legacy builds demand authentic fasteners: This magneto screw (SKU: 555539, superseded by 691061) anchors the flywheel assembly in pre-Gen 5 Briggs engines.

• Corrosion-resistant for enduring use.
• Precise threading prevents loosening.
• Essential for ignition reliability.

Not for modern Gen 5, it's perfect for restoring classic Animals, keeping sparks timed right for smooth revs and organized vintage fleets.

Frequently Asked Questions

Q: Is this screw compatible with my modern Gen 5 Briggs engine?

A: No. This magneto mounting screw is specifically designed for legacy Briggs engines and is not compatible with current-generation Gen 5 engines.

Q: I see this part is superseded by 691061. Should I still use this part number?

A: While this part (555539) is the original specification for many legacy builds, it has been superseded by 691061. Both parts serve the same function in anchoring the flywheel assembly.

Q: What is the importance of using the correct magneto screw?

A: Using the correct, precision-threaded fastener is critical for maintaining proper ignition timing. A loose or incorrect screw can cause the magneto to shift, leading to timing issues, poor engine performance, or potential damage to the flywheel assembly.

Q: Does this screw require any special thread locker during installation?

A: While the screw features precise threading to prevent loosening, it is standard practice in kart engine building to use a small amount of medium-strength thread locker to ensure the fastener remains secure under the high-vibration environment of racing.

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