Well, the simple answer is yes especially if you are very careless as 230-250 VAC is present when it is running. It not as much as voltage as it is the amount of current available to push that voltage. I work on homemade linear RF and amplifiers and once I received 3rd burns on my finger tips from a capacitor that didn't have safety bleeders installed. Even through I bleed the capacitor it some how it recharged even with the power off providing me a sever shock across my hand. Close to 2000 vdc was present. Must had been another hide capacitor in the circuit. Believe me when the amp left it had those safeties installed as I didn't want an other tech getting electrocuted.
Once you use common sense and carefully work you should be fine but I do highly recommend knowing what you are doing when with anything electrical generator. Briggs has a couple service manuals pertaining to portable generators that give you a good prime on these.
As the Kaslon KG1200A you should find the IPL and wiring diagram if you plan on repairing this unit. It should give us a good which alternator setup you have in it. You may need to flash the alternator but that depends on the setup. I can't read the label in your image but it appears to a small wattage version. I usually see 5000 - 20,000 watts units occasionally in my shop. The larger units requires me to use a crane to move them around by myself.
I would need to PM you the SM links that I have on my Google drive if you would like copies to look at. They are just educational materials since they don't refer to your specific generator but they will provide a good working knowledge base. Just let me if you want them.
