2005 Mercury Racing Optimax 250XS Serial number 0T998654. I know my engine requires premium fuel (91 octane or higher), my question is, should I use 93 octane premium, or 91 octane ethanol free? The owners manual states not to use gasoline with more than 10% ethanol, and I am using Don's recommended cocktail of Quickleen and Quickcare.
Thank you.
i personally own that same engine and have ran both of those for 900 hours without a problem either will work just fine
.................................................. ...the scariest thing in life is the unknown ...................................
I use 93 with 10% or less ethanol
Thanks guys!
.................................................. ...the scariest thing in life is the unknown ...................................
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Reply With Quote
