Lawn Mower Fuel Tank Cap – AL-KO, LONCIN LC Series Replacement

Keep your lawn mower running smoothly with this durable replacement fuel tank cap. Designed as a direct fit for a wide range of popular mower models including AL-KO, PRO 140, QSS, OHV, and LONCIN LC Series, this cap delivers a secure, leak-free seal every time. Available in a convenient 1-pack or money-saving 2-pack so you always have a spare on hand.

Made in Mainland China.

Key Features

Wide Compatibility: Direct replacement for AL-KO (part #411919) and LONCIN (part #170870094-0001) fuel caps, as well as PRO 140, QSS, and OHV mower models.
Secure, Leak-Proof Seal: Engineered for a tight fit that prevents fuel leaks and shields the engine from contaminants — protecting your mower's performance.
Durable Plastic Construction: Made from robust, weather-resistant plastic built to handle the demands of regular outdoor use season after season.
Tool-Free Installation: Simply swap out your old or damaged cap — no tools required. Quick and effortless, even for first-timers.
Available in 1 or 2 Pack: Pick up a single replacement or grab two for long-term peace of mind.

Specifications

Product: Fuel Tank Cap / Cover
Material: Plastic
Color: Black
Dimensions: 5.5 × 5.5 × 2.2 cm
Pack Options: 1 pc or 2 pcs
Compatible Models: AL-KO, PRO 140, QSS, OHV, LONCIN LC Series
Replaces Part Numbers: AL-KO 411919 | LONCIN 170870094-0001 | MS139-42

Package Contents

1× or 2× Fuel Tank Cap (based on your selected option)

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For general lawn mower safety and maintenance guidance, visit the U.S. Consumer Product Safety Commission (CPSC).

Note: Monitor brightness and lighting conditions may cause slight color variation from images shown. Please allow a small tolerance for manual measurements.

Learn more: Rural King

Frequently Asked Questions

Q: Which lawn mower models is this fuel tank cap compatible with?

A: This fuel tank cap is designed to fit AL-KO (part #411919), LONCIN LC Series (part #170870094-0001), PRO 140, QSS, and OHV series lawn mowers. It replaces the MS139-42 cap reference. Always double-check your mower's part number before ordering to confirm fitment.

Q: Do I need any tools to install this fuel tank cap?

A: No tools are needed. The cap is engineered for a simple, tool-free installation — just remove the old cap and press or twist the new one into place for a secure, leak-proof fit.

Q: Why should I buy the 2-pack instead of a single cap?

A: The 2-pack offers great value and ensures you always have a spare ready. Fuel tank caps can wear or go missing during seasonal maintenance, so having a backup means less downtime and more time mowing.

Q: Will this cap prevent fuel leaks effectively?

A: Yes. The cap is engineered to create a tight, secure seal on compatible fuel tanks, preventing fuel leaks and keeping dirt and debris out of the tank — helping to maintain your mower's engine performance over time.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.

We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.