Deciding whether to repower your boat is a major decision. Although it can help you improve the performance of your boat, you must first consider other factors.

Here are the top 9 things to think about with marine engine repowering:

1. Why Do You Want to Repower Your Boat?
The first thing you need to consider with boat motor repowering is why you want to do it. What is driving the decision? Is it that the engine is not performing, or are you hoping to improve fuel efficiency?

Perhaps you want a higher-powered engine that feels and sounds nice, or you want to boost the resale value. Whatever your reasoning, be sure that you thoroughly understand what that entails. This will also help you choose the right engine re-power specialists!

2. How Old Is Your Boat?
Before you invest in a new mercury motor, think about how old your boat is. If your vessel is still in good condition this may not be a concern, but you may need to rethink how you go about marine repowering if your boat is very old.

If your boat is older, it may be a good idea to replace the entire engine – including all the components like the gearbox and stern drive. Similarly, a brand-new engine will run better and be easier to maintain in the future.

On the other hand, if the boat is still new, you may be able to get away with just upgrading the engine and the ancillary parts that it requires to run.

3. The Balance Between Performance and Fuel Use
Speaking of fuel – let’s discuss the balance between fuel use and performance. Every boat has a maximum horsepower recommendation based on the specification of the motor.

When you work with our certified mercury workshop, they will be able to help you understand these measures for your boat but the key is that going above this maximum horsepower doesn’t boost your engine further: it just increases the amount of fuel you consume!

4. Warranty Considerations
Next, you need to address warranty considerations. If you choose to move forward with motor repowering, it may void your existing warranties. This is especially true if you boost the power output above the manufacturer’s recommendations and it is not something we do or recommend!

5. What About Insurance?
You also cannot forget about insurance, as insurance providers will consider horsepower when they determine the cost of your coverage. Simply put, if you request that our re-power specialists increase the horsepower above that level, the price of your insurance could go up significantly.

6. The Weight of the Engine
The weight of the engine is another valuable consideration for motor repowering. As the power of the engine goes up, usually so does the weight.

Be careful to avoid placing an engine that is too heavy on the back of your boat! This can cause the vessel to bob up and down excessively – even in calm water – which can lead to a poor boating experience or a few seasick passengers.

7. Reconditioning or Repowering?
In some cases, a complete motor repowering may not be necessary. For instance, if overheating is the main problem that you are trying to fix, you may only need to recondition the engine. This involves keeping all the ancillaries that are in place but replacing the engine itself.

8. The Boat’s Features
When you are thinking about motor repowering, you should always consider your boat’s features. The weight of the boat, prop setup, and hull shape all factor into what horsepower will give you the maximum performance.

These calculations can be calculated but don’t worry – our re-power specialists will help you get an idea of what a new Mercury motor can do for your vessel!

9. Define what Performance Means to You
Last but not least, consider what performance means to you. There will always be trade-offs between reliability, performance, and fuel efficiency, and only you can decide what your top priorities are.

If you are ready to repower your Mercury outboard motor, contact us at Mike’s Marine today! We have over 80 years of experience with marine engine repowering, and our experts can help you walk through each of these considerations.