Product Modification Frequently Asked Questions

Boat speed and performance depend on many things like boat hull type and condition, propeller type and condition, and the condition of the engine. You should check these basic items before thinking about modifications to get more horsepower or speed. MerCruiser engines are built to give the best performance and reliability. Engine modifications can have serious effects on the life of the engine package and may put your warranty coverage at risk. We cannot help you modify your engine.

MerCruiser has not tested and cannot approve the use of aftermarket products like these. Improper installation and/or application of these type products can cause severe engine damage. Engine modifications can have serious effects on the life of the engine package and may put your warranty coverage at risk. Damage caused by product modifications is not covered by the limited factory warranty. We cannot help you modify your engine.

This is not as simple as just changing your carburetor. It requires replacing the intake manifold, fuel line, and possibly the ignition module. Engine modifications can have serious effects on the life of the engine package and may put your warranty coverage at risk. Damage caused by product modifications is not covered by the limited factory warranty. We cannot help you modify your engine.

We do not have a fuel injection conversion kit for any of our engines. Components that would need to be changed include the ECM (computer), wiring harness, intake manifold, fuel delivery system (rail, lines, pump), ignition system, etc. Engine modifications can have serious effects on the life of the engine package and may put your warranty coverage at risk. Damage caused by product modifications is not covered by the limited factory warranty. We cannot help you modify your engine.

We offer closed-cooling kits for most MerCruiser engines. However, there are some newer products for which a kit is not yet available. Please check with your authorized MerCruiser dealer to determine if a kit can be ordered and, if so, what other components may be required along with the kit.

While these add-on devices may reduce the time it takes to get the boat on plane, they may also cause or contribute to abnormal or even unsafe handling of the boat and failure of the anti-ventilation plate. Because it is not possible to know how a particular boat will respond to the use of an aftermarket stabilizer fin without thorough testing, MerCruiser cannot recommend that such products be used or not be used. Failures caused or contributed to by modifications are not covered by the limited warranty.

The warranty does not apply to damage or failures caused by use of an accessory or part not manufactured or sold by us. See the appropriate MerCruiser warranty policy for your product or in your owner's manual.


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