Your trying to split a hair but I'll bite
Get the boots and clamp from Merc/VP and you will get a quality clamp. Buy one from Sierra or other and it can be a crap shoot
Does this help?
If throttle is moved move 3/4 to full throttle the ECM shuts off the injectors, so if it was flooding this should allow it to start if there is spark
Moving the throttle a bit to 1/4 throttle and it starts than this would lean toward the IAC and TPS.
I'm leaning toward the IAC without more...
I would start looking closer at the IAC and TPS.
Basically you gave the motor more air and it fired up
First post
What where you doing during this time?
If you were moving throttle than back to idle, than crank, this would do nothing.
If you opened throttle slightly and it still did not...
Might get 2 fuel vales and Tee them from the tank tube.
https://www.ebay.com/itm/143388702127?chn=ps&google_free_listing_action=view_item
A marine electric 3 way valve is around $800
https://www.hardin-marine.com/p-13899-3-port-superflow-fuel-selector-valve.aspx
I just looked at the NY Regs, Man they have a book they call a pamphlet, every area has different Regs
https://dec.ny.gov/things-to-do/freshwater-fishing/regulations