Pull start ?..yikes!!
I hold open as I want to be on my starter as little as possable. Even though in theory the bypass should just let the water on out and it be no different then trigger open it just isn't. Seems to take a few seconds for things to equalize within the lines or unloader to start passing, as well as the engine to lube and warm up. Warm starts are way easier then cold start.
(what Ron said
)