Mercury Platinum Warranty Coverage (2.5-14.9HP Outboards)All Mercury outboards come standard with 3 years Mercury Limited Warranty coverage. Available for separate purchase is the ability to add up to 5 additional years (8 total years) of Mercury Platinum Warranty coverage. Important Note: This warranty is only available for separate purchase with the purchase of any Mercury 2. 5 14. 9HP outboard. A factory backed extended service contract, Mercury Product Protection is administered 100% by Mercury Marine