2 Pack Replacement RA8HC Spark Plug for Champion Lawn Mower Models Review

Overview

This isn’t a lawn mower—it’s a two-pack of RA8HC replacement spark plugs designed to fit a wide range of Champion-branded lawn mowers (and many other small engines). At $11.99 for two plugs, it’s a budget-friendly maintenance item for anyone who owns a Champion mower and wants to keep it running smoothly without overpaying for OEM parts. The 4.7-star rating from 18 reviews suggests these plugs deliver reliable performance for the price.

Who Should Buy This

1. Champion mower owners – If you have a Champion push mower, self-propelled model, or even a tiller or generator with the same engine, this is the exact plug you need. It’s a direct replacement for most single-cylinder Champion engines.

2. DIY lawn equipment maintainers – You change your own oil, air filter, and spark plug annually. This two-pack gives you one for now and a spare for next season, saving you a trip to the store later.

3. Budget-conscious homeowners – You want a functional spark plug that works, without paying premium prices for brand-name options like NGK or Bosch. These RA8HC plugs are a solid value at roughly $6 each.

4. Small engine owners with multiple machines – If you have a Champion mower, a pressure washer, or a log splitter that uses the same plug, this two-pack lets you service two machines at once.

Key Features Breakdown

• RA8HC Compatibility – This is a standard, pre-gapped spark plug used in many Champion engines (and some other brands). The “RA” indicates a resistor-type plug (reduces radio interference), “8” is the heat range, and “HC” means it has a copper core for better conductivity. For most lawn mowers, this is the correct heat range—not too hot, not too cold.

• Two-Pack – You get two plugs in one package. This is smart because spark plugs are a wear item; you should replace them annually or every 100 hours of use. Having a spare means you won’t be caught without one when the mower starts to miss or struggle.

• Pre-Gapped – The plug comes pre-set to the correct gap (usually 0.030 inches for most Champion mowers). You can install it right out of the box without fiddling with a gap tool. That said, it’s always worth double-checking with a feeler gauge—manufacturing tolerances vary.

• Copper Core – Copper is a good conductor of electricity, which helps produce a strong spark. It’s not as durable as platinum or iridium (those last longer), but for a mower that gets used a few hours a week, copper is perfectly fine and much cheaper.

• Price – $11.99 for two plugs is about half what you’d pay for two NGK equivalents. If you’re on a tight budget, this is a no-brainer.

Pros

1. Direct fit for Champion mowers – No adapter, no modification needed. It screws right in and works with the existing ignition system.

2. Great value – Two plugs for under $12 means you’re paying about $6 each. That’s cheaper than most single spark plugs at auto parts stores.

3. Pre-gapped saves time – You can install it immediately without measuring or adjusting the gap. Perfect for quick maintenance.

4. Consistent performance – Users report that these plugs provide reliable starts and smooth idle, even after months of use. No misfires or fouling issues.

5. Works in other small engines – If you have a generator, pressure washer, or log splitter that uses the same RA8HC plug, you can use these too. Versatile.

6. Simple packaging – No wasteful cardboard or plastic. The plugs are well-protected but easy to open.

Cons

1. Not for all Champion models – While RA8HC is common, some newer or older Champion mowers may use a different plug (like RA6HC or RA10HC). Check your owner’s manual before buying.

2. Copper core wears faster – Copper plugs typically last 25–30 hours of run time before the gap widens and performance drops. If you mow a large lawn weekly, you might need to replace them mid-season.

3. No brand warranty – These are generic replacement plugs, not Champion OEM parts. If one fails prematurely, you’re out $6—not a huge risk, but worth noting.

4. Gap may be off – Some users report that the pre-gapped setting isn’t always accurate. You should still verify with a gap tool (especially if your mower has a finicky ignition system).

Bottom Line

If you own a Champion lawn mower that calls for an RA8HC spark plug, this two-pack is a smart, cost-effective way to keep your mower running reliably. For $11.99, you get two plugs that install easily, start consistently, and perform well for a season of regular mowing. The copper core means you’ll need to replace them more often than premium plugs, but at this price, you can afford to. It’s not the absolute best spark plug on the market—if you want maximum longevity, spring for an NGK or Champion-branded iridium plug. But for the vast majority of homeowners who just want their mower to start on the first pull and run smoothly, this is a solid, no-fuss choice. I recommend it for anyone doing routine maintenance on a Champion mower.

Frequently Asked Questions

Q: Will this spark plug fit my Champion mower model?
A: The RA8HC is used in many Champion single-cylinder engines, but not all. Check your owner’s manual for the exact plug number. If it says RA8HC, RA8, or 8HC, this will work. If it specifies a different heat range (like RA6HC or RA10HC), don’t use this plug—it could run too hot or too cold.

Q: Do I need to gap this plug before installing?
A: It comes pre-gapped, but I recommend checking with a feeler gauge. The correct gap is usually 0.030 inches (0.76 mm). If it’s off by more than 0.005 inches, adjust it gently with a gap tool. Out-of-the-box gaps are usually fine, but it’s a quick check that can prevent starting issues.

Q: How often should I replace this spark plug?
A: For a typical lawn mower used 1–2 hours per week, replace it once per season (or every 100 hours of run time). Copper core plugs like this one wear faster than iridium or platinum, so if you notice the mower is hard to start, idling rough, or losing power, check the plug first. With two in the pack, you’ve got a spare ready for next season.