---
product_id: 119146833
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: "187968CFA"
currency: XOF
in_stock: true
reviews_count: 8
category: "Ngk"
url: https://www.desertcart.sn/products/119146833-ngk-spark-plug-lfr6a-6668-pack-of-8-watercraft-fx
store_origin: SN
region: Senegal
---

# V-cut electrode for rapid spark Specifically tuned for marine engines 16mm hex size for easy install 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:** 187968CFA
**Availability:** ✅ In Stock

## Summary

> ⚡ Ignite your marine adventures with NGK’s precision spark power!

## 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?** 187968CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/119146833-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

- • **Durable Copper Core:** High-quality copper core delivers consistent conductivity and long-lasting reliability
- • **Optimized Spark Gap:** 0.9mm gap engineered to reduce quenching and maximize combustion efficiency
- • **Perfect Fit, Zero Hassle:** 16mm hex size and 26.5mm reach ensure seamless direct replacement for Yamaha 1.8L watercraft engines
- • **Precision V-Power Ignition:** Unique v-cut electrode boosts spark speed & ignitability for peak marine engine performance
- • **Resistor Value for Smooth Operation:** 5K Ohm resistor minimizes electrical noise, protecting onboard electronics

## Overview

The NGK Spark Plug LFR6A 6668 (Pack of 8) is a genuine, direct-fit replacement designed specifically for Yamaha 1.8L marine engines. Featuring a unique V-cut electrode for faster spark development, a durable copper core, and a precise 0.9mm gap, these plugs optimize ignition efficiency and engine performance. With a 16mm hex size for easy installation and a 5K Ohm resistor to reduce electrical interference, this pack ensures reliable, smooth operation for your watercraft’s ignition system.

## Description

Genuine 8 pack NGK V-Power 6668 Spark Plug

Review: Direct fit for the 1.8L - Direct replacement for the marine Yamaha 1.8L And way better price than the dealership. According to the manual they need to be changed along with the annual oil change.
Review: Fixed my issue - Worked as a good spark plug should. Made my Yamaha boat purr

## 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
- NGK Spark Plugs
- Brand new

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07PDYZNPW |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #101,276 in Automotive ( See Top 100 in Automotive ) #679 in Automotive Replacement Spark Plugs |
| Brand | NGK |
| Core Material | Copper |
| Customer Reviews | 4.9 4.9 out of 5 stars (129) |
| Date First Available | March 8, 2019 |
| Item Weight | 15.4 ounces |
| Item model number | 6668 |
| Manufacturer | NGK |
| Manufacturer Part Number | 6668 |
| Model | 8 pack NGK V-Power 6668 Spark Plug |
| Position | Front, Rear |
| Product Dimensions | 3.7 x 0.94 x 6.64 inches |
| Thread Size | 14 millimeters |
| Top Material Type | Nickel |
| UPC | 087295195758 |
| Vehicle Service Type | Car, Truck |

## Product Details

- **Brand:** NGK
- **Core Material:** Copper
- **Thread Size:** 14 millimeters
- **Top Material Type:** Nickel
- **Vehicle Service Type:** Car, Truck

## 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 September 8, 2025*

Direct replacement for the marine Yamaha 1.8L And way better price than the dealership. According to the manual they need to be changed along with the annual oil change.

### ⭐⭐⭐⭐⭐ Fixed my issue
*by A***R on August 16, 2025*

Worked as a good spark plug should. Made my Yamaha boat purr

### ⭐⭐⭐⭐⭐ Great product!
*by A***W on February 10, 2026*

Work great on my Yamaha boat!

## 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

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-03-05*