I have a 2018 Mercury 9.9 which I used the summer of 2018 and then winterized it to factory specs for the winter. I didn’t use the motor this summer, 2019, remained on the stand in the garage. Do I need to winterize the motor again for this coming 2019-20 winter?
Re-winterize outboard motor
- Thread starter wing15601
- Start date
Up here in the Great White North I run the engine in fresh water until the carb. runs dry. It's worked for years. I don't think you need to re-do a job already done but if it makes you feel better........
You should at least turn the engine over to move oil to all the engine parts. Pull the rope.
Sta-bil website states it's only good for two years to my surprise
STA-BIL Storage Fuel Stabilizer - Keep Fuel Fresh | Gold Eagle Co
STA-BIL Storage Fuel Stabilizer - Keep Fuel Fresh | Gold Eagle Co
You probably don't have an integral tank on a 9.9 so stale fuel shouldn't be a problem
I had heard it had a shelf life too. I probably should throw mine out.
How Do I Know if My STA-BIL Fuel Stabilizer is Still Good to Use?
STA-BIL® fuel stabilizer has an extended shelf life due to some of the same properties that allow it to stabilize fuel.
Website stated two year shelf life after opening as well. Some older formulas will develop crystalized flakes. Newer formulas will turn darker red. Looks like I need to toss mine out as well!I had heard it had a shelf life too. I probably should throw mine out.
How Do I Know if My STA-BIL Fuel Stabilizer is Still Good to Use?
STA-BIL® fuel stabilizer has an extended shelf life due to some of the same properties that allow it to stabilize fuel.www.goldeagle.com
Most small engines, including both my mercury outboards (4hp & 9.9HP) , my snow blower and my honda generator have a drain screw to drain the last drops of gasoline from the carburetor bowl. I always do that before storing it for the winter.