Mercury – Tune-Up Kit | Ignition System Component | Delco Conventional Ignition | 34235T1

Overview

A smooth-running engine starts with a strong spark, and the Mercury Marine 34235T1 Tune-Up Kit gives your ignition system everything it needs to perform at its best. Designed for Marinized 4- and 6-cylinder MerCruiser engines built by General Motors with Delco conventional ignition systems, this OEM kit includes a new condenser, points, and rotor — the key components that keep your ignition firing cleanly and consistently. With fresh, properly matched parts, your MerCruiser will start easier, idle smoother, and deliver reliable power every trip.

Key Features

• Purpose: Restores reliable ignition timing and spark strength by replacing key ignition components.
• Contents: Includes rotor, condenser, and breaker points — all OEM-quality parts.
• Material Quality: Built from marine-grade, corrosion-resistant materials for long-lasting performance.
• Performance: Helps deliver a steady spark and improves combustion efficiency for smoother operation.
• Compatibility: Fits 4- and 6-cylinder GM-based MerCruiser engines using Delco conventional (non-HEI) ignition systems.
• Maintenance: A complete solution for a seasonal tune-up or when troubleshooting hard starts and misfires.

Engine & Boat Compatibility

• Marinized 4- and 6-cylinder MerCruiser engines built by General Motors.
• Designed for models equipped with Delco conventional ignition systems.
• Common on classic runabouts, cruisers, and inboard boats using older MerCruiser power.
• Suitable for use in both freshwater and saltwater environments.

Performance & Practical Benefits

The 34235T1 Tune-Up Kit refreshes your entire ignition system in one simple step. By replacing worn breaker points, condenser, and rotor, you restore clean voltage transfer and precise ignition timing — the foundation of efficient combustion.

You’ll notice the difference right away: quicker starts, more consistent idle, and smoother acceleration across the RPM range. Mercury’s components are built for marine durability, resisting corrosion, vibration, and heat to keep your engine dependable all season long.

Why Buy OEM

Ignition systems are all about precision, and the Mercury 34235T1 kit is a genuine Mercury Marine product designed specifically for MerCruiser’s GM-based engines. Aftermarket kits often use low-grade metals or poorly matched components that cause weak spark or premature wear.

Mercury’s OEM ignition parts are tested for proper contact pressure, conductivity, and timing accuracy — exactly what your engine was built to run with. Using genuine parts means better reliability, longer component life, and fewer headaches on the water.

FAQ

Q1: What’s included in the kit?
The kit includes a rotor, condenser, and breaker points — all OEM Mercury parts.

Q2: Which engines does it fit?
It fits 4- and 6-cylinder MerCruiser engines built by General Motors using Delco conventional ignition systems.

Q3: How often should I replace these parts?
Perform a tune-up once per season or every 100 hours of operation for consistent ignition performance.

Q4: Will it fix hard starts or misfires?
Yes — new ignition components restore proper timing and voltage delivery, solving most ignition-related issues.

Q5: Why use OEM parts?
They’re engineered for the correct fit, spark calibration, and durability required in marine environments.