Mercury 10/15 Sea Pro/Marathon - 6/8/9.9/10/15 HP User Manual page 20

WARRANTY INFORMATION
15. Use of fuels and lubricants which are not suitable for use with or on the
product. Refer to the Maintenance section.
16. Our limited warranty does not apply to any damage to our products
caused by the installation or use of parts and accessories which are
not manufactured or sold by us. Failures which are not related to the
use of those parts or accessories are covered under warranty if they
otherwise meet the terms of the limited warranty for that product.
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