Well I had a look at it and checked the flow of fuel with the petrol cap on tightly and with the cap removed. It seems to be flowing at the same rate. So I think the cap is venting ok. I did notice though as the tank was getting lower and lower the fuel flow was also getting slower and weaker, sort of like the filter is slowing it down somewhat.
I had a close look at the fuel tank on this mower and it looks like you can never actually use up all the fuel in the tank by design. It has like a lower moulded section which is like a little lake where some fuel will sit. This is lower than the section where the fuel filter sits and it will never be drawn into the fuel line.
Another thing I have noticed with this straight intake manifold Powertorque 2 engine is if you look at the height from where the fuel outlet is on the tank to where the inlet sits on the carby it's only just a little bit lower than the tank. I mean these things don't have fuel pumps they are really just flowing the fuel in as you would be siphoning fuel from a higher point to a lower point.
There is alot more height from the fuel tank outlet to the carby inlet on my 1982 Commando full crank. You would think this would help a little getting that fuel flowing a bit better than what they have on this later PT2 lawnmower setup. Also I know on my full crank tank you can pretty much use up all the fuel in the tank not like this newer design.
Anyway I installed another older style genuine Victa fuel tap with an orange handle which has the longer fuel filter on it as this tank originally had. I will test it out again one day and see if it's made any difference.
Cheers!
Zip a dee doo dah, zip a dee ay, another trash picked Victa, hip hip Hooray!
