Essential Spark Plug Guide for the 2006-2015 Honda TRX680FA FourTrax Rincon
Don't get stuck on the trail; understand the right spark plug for your Rincon's engine.
- The OEM spark plug for your Rincon is a long-lasting Iridium type, most often made by NGK.
- For best results, replace your plug with an Iridium model from NGK or Denso.
- Symptoms of a bad plug include hard starting, rough idle, and poor performance.
- Replacing the spark plug is an easy and inexpensive DIY job that can significantly improve how your ATV runs.
The Heart of Your Rincon's Ignition
Your Honda Rincon is a tough machine, but it depends on a small, simple part to bring its engine to life: the spark plug. This part delivers the electrical spark needed for combustion. Over time, the electrode on the plug wears down from heat and electrical erosion. A worn or fouled spark plug can cause a number of problems, making a simple replacement one of the most effective tune-up jobs you can do.
Symptoms of a Failing Spark Plug
A bad spark plug can make your Rincon run poorly. Watch out for these signs:
- Hard Starting: The engine cranks but struggles to fire up, or won't start at all.
- Rough Idle: The engine shakes or runs unevenly when you're not on the throttle.
- Poor Performance: You may notice less power, slow acceleration, or hesitation when you press the throttle.
- Engine Misfires: The engine may sputter or stumble, especially under load.
- Worse Fuel Economy: A weak spark leads to inefficient combustion, meaning you'll burn through fuel faster.
Pro Tip: Check the Old Plug
When you remove the old spark plug, look at its tip. If it's covered in black, sooty deposits or oily residue, it can point to other engine issues. The owner's manual for the TRX680FA advises against cleaning the original iridium spark plugs; if they are fouled or worn, they should be replaced.
Choosing the Right Aftermarket Spark Plug
For the 2006-2015 Honda TRX680FA Rincon, the factory installs a high-quality Iridium spark plug from NGK. This is your best bet for a replacement.
- Tier 1 (OEM Quality): NGK and Denso. Both NGK and Denso are original equipment suppliers for Honda. Sticking with an Iridium plug from either of these brands is the safest choice for guaranteed compatibility and performance. The NGK IFR5L-11 is a commonly specified plug for this model.
- Tier 2 (Standard Aftermarket): Champion. Champion is a well-known brand that also produces plugs for the Rincon. While functional, NGK and Denso are generally considered the top choice for Japanese engines to maintain original performance.
The original equipment manufacturer (OEM) part is an iridium plug, which lasts longer and provides a more consistent spark. It is highly recommended to replace it with another iridium plug.
| Option | Estimated Cost | Notes |
|---|---|---|
| New Aftermarket (NGK, Denso Iridium) | $12 - $23 | Recommended choice for OEM performance. |
| New Aftermarket (Champion, other) | $3.50 - $15 | Basic copper or platinum plugs may be cheaper but won't last as long as iridium. |
| Shop Labor | $45 - $90 | This is a quick job for a mechanic, usually taking less than an hour. |
Frequently Asked Questions
Do I need a special spark plug for my Rincon?
Yes, you should use an iridium spark plug as specified by the manufacturer. The Honda owner's manual specifically notes that the TRX680FA uses spark plugs with an iridium-coated electrode. Using a standard copper plug will result in shorter life and potentially reduced performance.
How often should I change the spark plug on my TRX680FA?
Check your owner's manual for the exact service interval. As a general rule, a spark plug should be inspected during regular maintenance. In forum discussions, owners often change them every few years as preventative maintenance, or when symptoms appear. Because iridium plugs last a long time, you may not need to change it as often as a standard plug.
Is changing the spark plug a difficult job?
No, this is a great DIY task for beginners. You will need a ratchet and a spark plug socket. The plug is located on the side of the engine, and you may need to remove a plastic side panel for easier access. The key is to be gentle, don't over-tighten the new plug, and make sure you don't cross-thread it when installing.
Were there any recalls for the Rincon's spark plug?
No, there have been no recalls or technical service bulletins (TSBs) issued for the spark plug on the 2006-2015 Honda TRX680FA FourTrax Rincon. Some owners have reported a general "loss of spark," but this can be caused by several different ignition components, not just the plug itself.
Technical Specifications
OEM Part Numbers: 98079-5517U
Recommended Plug Type: Iridium Common Aftermarket Plugs: NGK IFR5L-11, NGK CPR6EB-9
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Honda TRX680FA FourTrax Rincon: