---
product_id: 56876482
title: "Distributor Cap and Rotor Tune up Kit for Mercruiser 4.3 Engines with Thunderbolt I and IV ignitions 815407Q5 815407Q02 815407A2 4.3L Mercury Marine"
brand: "boise boat works"
price: "€ 38.43"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.pt/products/56876482-distributor-cap-and-rotor-tune-up-kit-for-mercruiser-4
store_origin: PT
region: Portugal
---

# Precision fit for Mercruiser 4.3L V6 Complete kit with cap, rotor, gasket & bolts Easy install, boosts ignition reliability Distributor Cap and Rotor Tune up Kit for Mercruiser 4.3 Engines with Thunderbolt I and IV ignitions 815407Q5 815407Q02 815407A2 4.3L Mercury Marine

**Brand:** boise boat works
**Price:** € 38.43
**Availability:** ✅ In Stock

## Summary

> ⚡ Ignite your Mercruiser’s power with precision and reliability!

## Quick Answers

- **What is this?** Distributor Cap and Rotor Tune up Kit for Mercruiser 4.3 Engines with Thunderbolt I and IV ignitions 815407Q5 815407Q02 815407A2 4.3L Mercury Marine by boise boat works
- **How much does it cost?** € 38.43 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/56876482-distributor-cap-and-rotor-tune-up-kit-for-mercruiser-4)

## Best For

- boise boat works enthusiasts

## Why This Product

- Trusted boise boat works brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durability Meets Precision:** High-quality components ensure consistent spark delivery and extended engine life
- • **All-in-One Tune-Up Solution:** Includes distributor cap with brass terminals, rotor, gasket, and mounting bolts for hassle-free replacement
- • **Trusted by Pros & Enthusiasts:** Top 10 ranked in Automotive Replacement Distributor Cap & Rotor Kits with 4.5-star rating
- • **Engineered for Peak Performance:** Optimized for Mercruiser 4.3L V6 Thunderbolt I & IV ignitions since 1985
- • **Upgrade Your Ride’s Heartbeat:** Restore ignition efficiency and avoid costly downtime with this OEM-grade kit

## Overview

This Distributor Cap and Rotor Tune-Up Kit by Boise Boat Works is designed specifically for Mercruiser 4.3L V6 engines equipped with Thunderbolt I and IV ignition systems from 1985 onward. The kit includes a distributor cap with brass terminals, rotor, gasket, and bolts, ensuring a perfect fit and reliable ignition performance. Highly rated and ranked among the top replacement kits, it offers an easy upgrade to maintain engine efficiency and prevent ignition failures.

## Description

New Distributor cap and rotor kit for Mercruiser V6 engines with Thunderbolt I and IV Ignition systems, 1985 and newer

## Features

- New Distributor cap and rotor kit for Mercruiser V6 engines with Thunderbolt I and IV Ignition systems
- Replaces Part #: 815407Q5, 815407A2, 18-5274, 9-29317
- Fits: All GM 4.3L V6 engines with Thunderbolt Ignition from 1985 and Up
- Includes: Cap with brass terminals, Rotor, Gasket, Bolts

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Asin | B078PPPYK8 |
| Best Sellers Rank | #46,023 in Automotive (See Top 100 in Automotive) #9 in Automotive Replacement Distributor Cap & Rotor Kits |
| Brand | Boise Boat Works |
| Customer Reviews | 4.5 4.5 out of 5 stars (136) 4.5 out of 5 stars |
| Date First Available | December 29, 2017 |
| Item Model Number | 43220-8411 |
| Item Weight | 10 ounces |
| Manufacturer | Boise Boat Works |
| Manufacturer Part Number | 43220-8411 |
| Package Dimensions | 5.43 x 4.61 x 4.21 inches |

## Images

![Distributor Cap and Rotor Tune up Kit for Mercruiser 4.3 Engines with Thunderbolt I and IV ignitions 815407Q5 815407Q02 815407A2 4.3L Mercury Marine - Image 1](https://m.media-amazon.com/images/I/61ZKwpm-+VL.jpg)
![Distributor Cap and Rotor Tune up Kit for Mercruiser 4.3 Engines with Thunderbolt I and IV ignitions 815407Q5 815407Q02 815407A2 4.3L Mercury Marine - Image 2](https://m.media-amazon.com/images/I/91i11KLZzBL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice cap
*by  on Reviewed in the United States December 19, 2025*

Works great on my boat

### ⭐⭐⭐⭐⭐ Perfect OEM fit
*by  on Reviewed in the United States November 27, 2024*

Fits just like the original. Functions exactly the way you'd expect an original factory part, only this one saves you some cash! Recommend to anyone chasing an ignition issue or just doing preventative maintenance.

### ⭐⭐⭐⭐⭐ Perfect fit
*by  on Reviewed in the United States July 18, 2026*

Fit perfectly with no

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**Shop now:** [https://www.desertcart.pt/products/56876482-distributor-cap-and-rotor-tune-up-kit-for-mercruiser-4](https://www.desertcart.pt/products/56876482-distributor-cap-and-rotor-tune-up-kit-for-mercruiser-4)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-09-06*