Zeus wrote:Start with the simple stuff as the others have said , check that it’s getting fuel, and the filter isn’t blocked. Pull the plugs and check their colour/ condition. I’d also check the tank breather isn’t blocked too.

Thanks for the info. Fuel was definitely good. We found that when we put fuel to ON then one of the exhaust pipes barely had any smoke(and it's cold).

Definitely checking the plugs and carburetor, and yes I'll let him know that we should check tank breather too.

Do you use fuel treatment by any chance?