I would like to see a video of that operation from beginning to end. I can't imagine starting and ending the flow without a considerable mess.
Interesting. Maybe sometime I’ll video it but it would be a really boring video. Works like this:
1) Step on step with right leg. Put jug on right knee. Use left hand on loader to assist and steady for the actual step to the platform. Right hand carries the jug.
2) Step up, continue motion forward taking next step onto platform with left foot.
3) Stepping up with jug on right knee propels it forward as you step up. Use that momentum to assist in swinging it up to gently set the edge of the jug on the steering wheel.
4) With the jug sitting calmly on the steering wheel, both feet on the platform; everything stable and stopped: take the cap off the nozzle and set it aside.
5) Opening the cap on the vent now or after starting flow is optional. I remove vent cap now.
6) Place left index finger over the end of the nozzle. The nozzle and my left index finger are sized such that this forms a quite effective short duration low pressure valve.
7) Using right hand, tip the heel of the can off the steering wheel, gently sliding it onto the cowl. With the heel of the can in the corner formed by the steering wheel and cowl, slowly tilt the can down while guiding the nozzle into the fuel tank. This particular can just happens to fit the L4701 perfectly.
8) Immediately prior to left index finger interfering with nozzle entering the fuel tank filler neck, remove index finger and allow flow to start.
9) If you didn’t open the air vent previously, do it now.
10) Wipe the little bit of diesel you now have on you left index finger on your pants where there’s already a stain from the last 50 times you did the same thing.
With some minor variation specific to different machines and cans, that basic method of find something to rest it on and use a finger over the nozzle as a valve is pretty much how I’ve put fuel in a bunch of different stuff with a bunch of different cans for a few decades. I really thought that’s just how it’s done unless you had a pump or siphon.
Trying to think of some at least pseudo reasonable way that would make a mess and not coming up with anything. I suppose I could charge up on the platform sloshing diesel willy-nilly like some sort of drunken wild man but that doesn’t seem reasonable.