24-02-2019, 12:11 PM
I have two Sevens with semi down draught SUs and one with a bronze updraught Zenith. All have always started on the button no matter how old the fuel is. In the case of the updraught Zenith, I once left it with two gallons of French Supermarket petrol for over 12 months and it simply fired up as usual.
Steve
Steve