4.3L MerCruiser 100 & 300 Hour Service Kits

What’s Included in the 4.3L MerCruiser Service Kits

100-Hour Service Kit typically includes:

• Oil filter
• Fuel filters
• Gear case drain seals
• Spark plugs

300-Hour Service Kit includes:

• All items from the 100-hour kit
• Thermostat and gasket
• V-belts

These kits are designed to simplify regular maintenance, ensuring you always have the correct OEM parts for your 4.3L MerCruiser.

Pricing & Value

Prices for the 4.3L MerCruiser service kits vary depending on current availability and promotions. In general:

• The 100-hour kit is more affordable, covering routine service needs.
• The 300-hour kit provides additional parts for extended service intervals.

Purchasing as a kit is usually more cost-effective than buying each part individually.

Comparison Table: 100-Hour vs. 300-Hour Kit

Why Buy from PartsVu?

• Genuine OEM parts – direct from Mercury, built for your 4.3L MerCruiser.
• Fast shipping & easy returns – service kits are shipped quickly and backed by hassle-free returns.
• Expert resources – access maintenance charts, service schedules, and product schematics for guidance.

4.3L MerCruiser Maintenance Kits FAQs

What is included in the 4.3L MerCruiser 100-hour and 300-hour service kits?

The 100-hour kit typically contains an oil filter, fuel filters, gear case drain seals, and spark plugs. The 300-hour kit includes those items plus a thermostat, gasket, and V-belts.

How much do the service kits cost?

Prices vary depending on the kit and current promotions. Purchasing a complete kit is often more cost-effective than buying each part individually.

How do I buy 4.3L MerCruiser service kits from PartsVu?

Select the correct kit from this page and add it to your cart. All orders qualify for PartsVu’s fast shipping and may earn free shipping if over $99.

What are the risks of skipping 100-hour or 300-hour service intervals?

Delaying service can lead to reduced performance, higher fuel consumption, and premature wear of critical engine parts — ultimately increasing long-term repair costs.