I have a full 25 litre tank of 2 stroke fuel (for 1990 20HP Evinrude) which has been stored in my garage for around 3 months since I refilled... Should it be OK to use guys?
I've used 3 year old premix on a '72 Johnson 25 in the past. Granted it behaved more like a 22 than a 25, but it still ran.
Your biggest problem will be if it's had water ingress, but having said that if the tank was full and the air vent closed that problem should be soooo small it will be negligible.
Three months is no problem IMV. The fuel in my tank sits there for 6 months out of season. It's fine the next season. The only time I've had problems with old fuel is getting my mower to start but that's probably 12 months old. Once started it's fine, but it doesn't like it.
Last season's fuel and the engine starts second pull on the cord, and runs fine. But it's a good idea to run the engine dry before storage (take off the fuel line and run it until it stops) as I believe deposits can form in the carburettor/injection system if you don't.
speacking as some one who repaired obms before retiring , un-leaded petrol does go stale over time , and i allways used a stabalizer in the fuel to prolong its storage life, and i reckon if all the profesionall boat people on this site wrote in they have at sometime had problems with stale fuel,just thought i would throw that into the pot !
Breawatch
