---
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: "264 Lei"
currency: RON
in_stock: true
reviews_count: 8
category: "Boise Boat Works"
url: https://www.desertcart.ro/products/56876482-distributor-cap-and-rotor-tune-up-kit-for-mercruiser-4
store_origin: RO
region: Romania
---

# Compatible with Thunderbolt I & IV ignitions since 1985 Precision fit for Mercruiser 4.3L V6 Complete kit with cap, rotor, gasket & bolts 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:** 264 Lei
**Availability:** ✅ In Stock

## Summary

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

## 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?** 264 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/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

- • **Legacy Compatibility:** Works flawlessly with Thunderbolt I & IV ignition systems from 1985 onward.
- • **OEM-Level Reliability:** Exact factory fit ensures seamless ignition performance without guesswork.
- • **All-in-One Tune-Up Kit:** Includes distributor cap, rotor, gasket, and bolts for hassle-free installation.
- • **Boost Engine Efficiency:** Restores optimal spark delivery to keep your Mercruiser running smooth and strong.
- • **Preventative Maintenance Essential:** Avoid costly downtime with a trusted upgrade that keeps your boat firing on all cylinders.

## Overview

This Distributor Cap and Rotor Tune-Up Kit by Boise Boat Works is engineered for Mercruiser 4.3L V6 engines equipped with Thunderbolt I and IV ignition systems from 1985 and newer. The kit includes a distributor cap with brass terminals, rotor, gasket, and bolts, providing an OEM-quality replacement that ensures reliable ignition performance and easy installation. Ideal for both preventative maintenance and ignition troubleshooting, it delivers a cost-effective way to keep your marine engine running at peak efficiency.

## Description

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

Review: Nice cap - Works great on my boat
Review: Perfect OEM fit - 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.

## 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 | #666,328 in Automotive ( See Top 100 in Automotive ) #135 in Automotive Replacement Distributor Cap & Rotor Kits |
| Brand | Boise Boat Works |
| Customer Reviews | 4.4 4.4 out of 5 stars (128) |
| Date First Available | December 29, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 10 ounces |
| Item model number | 43220-8411 |
| 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 J***N on December 19, 2025*

Works great on my boat

### ⭐⭐⭐⭐⭐ Perfect OEM fit
*by T***E on 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.

### ⭐⭐⭐⭐⭐ Inexpensive and fast delivery
*by T***M on May 27, 2025*

Fast delivery and work good on my boat. And and the price was right.

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

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-21*