Cost to Replace 4.3 Mercruiser

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Updated on July 24, 2023

The average life of a 4.3 Mercruiser engine is 1,000 to 5000 hours or less, depending on how it is maintained or used. In case you have reached the end of life of your engine, you can still get a replacement from the market. 

There are replacements available in online stores and trusted marine engine stores, like e-Bay, Performance Product Technologies, Marine Engine Depot, and many more. The brand new 4.3 Mercruiser engine can cause up to $23,245, but you can always find cheaper ones for as low as $1000, but remember that in this life, you get what you pay for, so look for the best value for money and not because it is cheap. 

How much does it cost to replace a MerCruiser engine?

A 4.3 MerCruiser engine can run up to 5,000 hours before needing a major overhaul, depending on how it is maintained. When the time comes, you must find a good replacement engine, and selecting the right replacement Mercruiser engine can be a daunting task and quite expensive. Replacement costs will vary according to the brand or deals that you opt-in. Replacing or rebuilding your MerCruiser engine can cost as much as 10,000 dollars, depending on if you want a fancy brand or more powerful engine. Repair and replacement tend to be incredibly expensive because you need to hire a specialist to dismantle your old engine and install a new one, which left you spending an additional $4,000 or less, including its labor cost.

How much is a MerCruiser engine?

A brand new Mercruiser engine can cause up to $23,245, depending on its package. Usually, it comes with an add-on like ZF 45 C Mechanical Throttle & Shift, ZF 45 C DTS READY, Electric Shift, and bobtail.

Cheapest store for 4.3 MerCruiser replacement

A brand new MerCruiser engine can cause up to $23,245, depending on its package. It is quite expensive but, there are always cheaper options that you can find in many online stores. Here are a few of the stores where you can purchase Mercruiser engine: 

  1. e-Bay– you can find as low as 1000 dollars in these online stores that ship worldwide
  2. Wholesale Marine– they carry a wide array of engine sizes and top engine brands, from 3,000 dollars to 4,000 dollars
  3. – is a family-owned-and-operated business that sells a variety of marine engines. 4.3 Mercruiser price ranges from 6,000 dollars to 12,000 dollars. 
  4. Marine Engines Inc. – is an ISO 9002 Certified selling good quality refurbished marine engines and brand-new engines, including 4.3 Mercruiser
  5. Michigan Motorz– trusted marine engines and engine parts stores that offer MerCruiser, Volvo Penta, Marine Power, PCM, Crusader, Indmar, and more.
  6. Eagle Engine Sales– offers new, remanufactured, and performance marine engines and accessories. You can easily fill out their online form for a free quotation.

Can I buy MerCruiser engine spare parts?

Yes, you can buy marine engine spare parts. There are several stores that sell spare parts and accessories so that you don’t have to buy the whole package of the 4.3 MerCruiser engine. You can find spare parts in Michigan Motorz, Nuwave Marine, Partz Vu, Perfortech, and many more. You can always visit these websites and check the best deal for you. Also, it would help if you check reviews and community forums before you decide on your purchase.

Is it cheaper to rebuild or replace an engine?

Of course, a total replacement can be costly and much more expensive than rebuilding your engine. Rebuilding your engine would cost only half of a brand-new engine. But is it better to rebuild or to replace? The answer would depend on the present condition of your vessel if it is repairable or not. A brand-new replacement will tend to perform better than rebuilding your engines because rebuilt engines are already used, and the quality is not 100%. That’s is why replacement is way more expensive than rebuilding engines.

Is it worth buying a remanufactured engine?

Rebuilt engines are considerably worth buying, considering they are less expensive than replacing your engine. The performance is generally okay. But consider the overall condition of your engine. Though remanufactured engine is way cheaper than brand new engine, it makes more sense to buy a full set of brand new engine if your engine is totally worn-out.

Generally, a remanufactured engine should be as good as a new engine provided that it is properly done. Marine engine stores usually offer a one-year warranty for remanufactured engines. Many machine shops offer remanufactured engines, but you need to find the one that has a good reputation and good customer reviews. It is important to verify if they are a member of the Automotive Engine Rebuilders Association, to ensure the quality and best value for your money.