Re: 25 gallons of 4 year old gas????
BTDT. Add some 3 year old outboard gas to a almost full tank on my pickup. Eventually had to have truck my injectors cleaned for a price that was much greater than a new tank of gas.
I wouldn't run it if i were you it could do damage to the motor gas loses octane as it sits and could do bad things to the motor i just bought a boat with 2 year old gas and a marine mechanic told me to drain it or it could be bad for the motor and i'm not willing to pay for a new one!
BTDT. Add some 3 year old outboard gas to a almost full tank on my pickup. Eventually had to have truck my injectors cleaned for a price that was much greater than a new tank of gas.