Mercury OptiMax (2-stroke DI, legacy)
Direct-injection 2-stroke from the 2000s–2010s. Lighter and torquey, still common on bass boats, but louder, thirstier, and a generation behind modern 4-strokes on emissions and resale. Air-compressor and powerhead issues appear with age and neglect.
Service and what to check
Annual air-compressor and reed/check-valve attention; verify the compressor isn't ticking. Discount the boat vs. a 4-stroke-powered equivalent.
Watch usage: above roughly 120 hours/year, this family starts losing reliability points — always weigh total hours against the boat's age, and on any outboard or I/O over a few years old, insist on a compression or leak-down test before money moves.
Boats that ship with this engine
Looking at a boat with this engine?
The engine is the single biggest reliability and value variable on a used boat. Paste the listing and BoatVerdict scores the engine risk for the exact hours and year you're looking at — plus fair value, red flags, and what to inspect.
Paste a listing, get the verdict →