--- product_id: 445445037 title: "NGK Spark Plug LFR6A 6668 (Pack of 8) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm Gap 0.9mm Resistor Value 5K Ohm" brand: "ngk" price: "$248.62" currency: USD in_stock: true reviews_count: 5 category: "Ngk" url: https://www.desertcart.us/products/445445037-ngk-spark-plug-lfr6a-6668-pack-of-8-watercraft-fx store_origin: US region: United States of America --- # V-Cut electrode for rapid spark 26.5mm reach for perfect fit Resistor 5K Ohm reduces interference NGK Spark Plug LFR6A 6668 (Pack of 8) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm Gap 0.9mm Resistor Value 5K Ohm **Brand:** ngk **Price:** $248.62 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your watercraft’s potential—spark faster, run stronger! ## Quick Answers - **What is this?** NGK Spark Plug LFR6A 6668 (Pack of 8) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm Gap 0.9mm Resistor Value 5K Ohm by ngk - **How much does it cost?** $248.62 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/445445037-ngk-spark-plug-lfr6a-6668-pack-of-8-watercraft-fx) ## Best For - ngk enthusiasts ## Why This Product - Trusted ngk brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durability That Lasts:** Nickel electrodes and a 30,000-mile lifespan mean fewer replacements and more time on the water. - • **Perfect Fit Engineering:** 26.5mm reach and 14mm thread size ensure seamless compatibility with FX, FZR, FZS, VX, VXR, VXS models—no guesswork, just performance. - • **Precision Ignition Boost:** Unique V-cut electrode directs spark edgewise for faster, cleaner ignition—power your watercraft like a pro. - • **Trusted Quality & Warranty:** Made in the USA with a 1-year warranty—confidence in every spark, backed by NGK’s legendary reliability. - • **Interference-Free Operation:** Built-in 5K Ohm resistor minimizes electrical noise, keeping your onboard electronics glitch-free and race-ready. ## Overview The NGK Spark Plug LFR6A 6668 is a high-performance ignition component designed specifically for watercraft models FX, FZR, FZS, VX, VXR, and VXS. Featuring a unique V-cut nickel electrode for rapid spark development, a precise 26.5mm reach, and a 5K Ohm resistor to reduce electrical interference, this plug ensures reliable, efficient ignition and long-lasting durability up to 30,000 miles. Made in the USA and backed by a 1-year warranty, it’s the trusted choice for professional-grade watercraft performance. ## Description NGK V-Power plugs feature a unique v-cut in the center electrode that directs the spark to the edge of the electrode, helping the spark develop more rapidly, increasing ignitability and reducing quenching. Shell Thread Size: 14mm Thread Pitch: 1.25mm Seat Type: Gasket Resistor Value: 5K Ohm Reach: 26.5mm (1.04") Hex Size: 5/8" (16mm) Terminal Type: Solid Overall Height: ISO Gap: .035" (0.9mm) Center Electrode Material: Nickel Type: V-Cut Size: 2.5mm Projection: Projected Ground Electrode Material: Nickel Type: Standard Quantity: 1 Specifications Warranty: 1 Year Torque Specs: Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft. Heat Range: 6 Longevity: 30k Miles Resistor: Yes Review: Direct fit for the 1.8L Review: Fixed my issue ## Features - NGK V-Power plugs feature a unique v-cut in the center electrode that directs the spark to the edge of the electrode, helping the spark develop more rapidly, increasing ignitability and reducing quenching. - Shell Thread Size: 14mm Thread Pitch: 1.25mm Seat Type: Gasket Resistor Value: 5K Ohm Reach: 26.5mm (1.04") Hex Size: 5/8" (16mm) Terminal Type: Solid Overall Height: ISO Gap: .035" (0.9mm) - Center Electrode Material: Nickel Type: V-Cut Size: 2.5mm Projection: Projected Ground Electrode Material: Nickel Type: Standard Quantity: 1 - Specifications Warranty: 1 Year Torque Specs: Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft. Heat Range: 6 Longevity: 30k Miles Resistor: Yes ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07PDYZNPW | | Brand | NGK | | Brand Name | NGK | | Compatible with Vehicle Type | Watercraft | | Core Material | Nickel | | Country of Origin | USA | | Customer Reviews | 4.9 out of 5 stars 126 Reviews | | Gap Size | 0.9 Millimeters | | Item Weight | 435 g | | Manufacturer | NGK | | Manufacturer Part Number | 6668 | | Thread Size | 14mm | | Top Material Type | Nickel | | UPC | 087295195758 | | Vehicle Service Type | Watercraft | | What Is In the Box | 6668 | ## Product Details - **Brand:** NGK - **Core Material:** Nickel - **Thread Size:** 14mm - **Top Material Type:** Nickel - **Vehicle Service Type:** Watercraft ## Images ![NGK Spark Plug LFR6A 6668 (Pack of 8) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm Gap 0.9mm Resistor Value 5K Ohm - Image 1](https://m.media-amazon.com/images/I/61Gza71HK2L.jpg) ![NGK Spark Plug LFR6A 6668 (Pack of 8) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm Gap 0.9mm Resistor Value 5K Ohm - Image 2](https://m.media-amazon.com/images/I/61rrUIncREL.jpg) ![NGK Spark Plug LFR6A 6668 (Pack of 8) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm Gap 0.9mm Resistor Value 5K Ohm - Image 3](https://m.media-amazon.com/images/I/51oSINM70hL.jpg) ![NGK Spark Plug LFR6A 6668 (Pack of 8) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm Gap 0.9mm Resistor Value 5K Ohm - Image 4](https://m.media-amazon.com/images/I/51raall2kiL.jpg) ![NGK Spark Plug LFR6A 6668 (Pack of 8) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm Gap 0.9mm Resistor Value 5K Ohm - Image 5](https://m.media-amazon.com/images/I/51B9a6K+biL.jpg) ## Questions & Answers **Q: Compare ngk lfr6a and ngk lfr6a-11. are they interchangeable ? is gap the only difference and is so can be changed easy enough ?** A: The major difference between these plugs is the LRF6A comes pre-gapped at .036" and the LFR6A-11 is pre-gapped at .044" Technically speaking you should use the correct one of these as spec'd for your application as over adjusting the gap to compensate is not recommended. **Q: does this fit the 212 limited s?** A: Yes as long as you have the 1.8s ## Customer Reviews ### ⭐⭐⭐⭐⭐ Direct fit for the 1.8L *by N***E on 8 September 2025* ### ⭐⭐⭐⭐⭐ Fixed my issue *by A***R on 16 August 2025* ### ⭐⭐⭐⭐⭐ Great product! *by A***W on 10 February 2026* ## Frequently Bought Together - NGK Spark Plug LFR6A 6668 (Pack of 8) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm Gap 0.9mm Resistor Value 5K Ohm - Yamaha New OEM WaveRunner Boat Oil Gallon 10W-40 4W WATERCRAFT LUB-10W40-WV-04 - OEM Yamaha Oil Filter Element Assy; Oil Cleaner 69J-13440-04-00; 69J-13440-03-00, 69J134400400 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/445445037-ngk-spark-plug-lfr6a-6668-pack-of-8-watercraft-fx](https://www.desertcart.us/products/445445037-ngk-spark-plug-lfr6a-6668-pack-of-8-watercraft-fx) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-16*