YIGUCS RC12YC spark plug pack of 10 for versatile equipment compatibility.
YIGUCS RC12YC compatibility chart showing fit with Champion, Briggs & Stratton and more.
YIGUCS ceramic alloy spark plug highlights durable construction and corrosion resistance.
YIGUCS RC12YC spark plug with copper-core electrode for fast heating and reliable ignition.
YIGUCS RC12YC spark plug delivers high-temperature performance for efficient combustion.
YIGUCS RC12YC 10-pack arrives in secure packaging for easy stocking and replacement.

YIGUCS

RC12YC Spark Plug 491055 Pack of 10 | YIGUCS – Briggs & Stratton, Champion, John Deere

High-performance patio lawn and garden made for confident daily results

$28.61

3 shoppers currently have this item in cart.

Low stock: only 5 left in inventory. Add to cart before it's gone.

Shop Pay installment options may appear at checkout where eligible.

Free shipping Secure checkout 100% refund eligible
Bundle & save Buy 2 and save checkout time

Premium patio lawn and garden quality selected for United States (USA) customers.

Routine pack Build your routine pack (3)

Fast dispatch with always-free shipping and secure checkout on every order.

Free shipping

i

Free shipping on every order. Fast dispatch, tracked delivery, and secure checkout included.

Easy returns

i

Simple return flow and responsive support for eligible items.

Peak-demand shipping delays

i

During high demand, deliveries may experience short carrier delays. Tracking updates remain active for every order.

24/7 customer support

Questions before checkout? Our team is available and ready to help.

Return & RefundEasy returns and policy details Shipping PolicyDelivery process and tracking info
Share

Why customers choose Cera Garden

Overview

Meet the YIGUCS RC12YC Spark Plug, a 10-pack designed to support routine maintenance for a range of outdoor power equipment. Built to replace worn or fouled plugs, these spark plugs can help restore dependable starts and steady idling in compatible engines. The working feel is tactile and precise, from the cool ceramic body to the snug threads that help create a reliable seal during combustion.

Compatibility at a glance

This plug is designed to fit a broad array of brands and part numbers, including Champion RC12YC, Briggs & Stratton 491055 family (491055, 491055S, 491055T, 499608, 5066, 72347GS, 792015, 805015, 692051, 694385), John Deere M78543, Kohler variants, ARIENS, Gravely, MTD CC 759-3336, and Husqvarna models. Always confirm the exact fit for your engine before purchasing to avoid mismatches.

What’s inside

  • 10 high quality spark plugs with a ceramic and alloy body for durability
  • Copper-core electrodes designed for fast heating and reliable ignition

Key features and benefits

  • Durable ceramic and alloy construction resists wear and corrosion for a long service life
  • Copper-core electrodes enable quick heat and responsive ignition across a range of operating conditions
  • Capable of withstanding brief high-temperature spikes, contributing to consistent combustion
  • Manufactured under strict quality control for reliability in everyday use

Real-world use cases

Ideal for routine maintenance on lawn mowers, small tractors, snow blowers, and other outdoor equipment. Replacing worn plugs can help improve starting performance, smooth running, and overall engine health—without overpromising results.

How to replace and care tips

  • Check model compatibility before purchase to avoid mismatches
  • Follow the engine manufacturer’s recommended gap and torque during installation
  • Use a clean, dry environment when changing plugs to prevent contamination

Note: This product is intended for replacement in compatible engines. Performance gains vary by engine condition and operating environment.

FAQ

Q: What engines is the RC12YC spark plug compatible with?

A: Fits Champion RC12YC engines, Briggs & Stratton 491055 family, John Deere M78543, Kohler, ARIENS, Gravely, MTD, and Husqvarna models.

Q: What are the main materials and performance features?

A: Ceramic and alloy body with copper-core electrodes enable fast heating and reliable ignition under demanding conditions.

You may also like