A lot of hard start after sitting, is the gas evaporates and drains back into the tank too.It goes right though the air filter and even the manifold and valves, and you have an empty fuel bowl.
On injection engines still have same or similar problem the 35horse Kawaski on one, of my mowers and the 25 on my other one still take a bit to get fuel to the injectors. The push mower with carb has prime pump on the carb and starts easily after months.
The alcohol in the gas attacks brass steel and rubber and everything else via hydrogen embrittlement. One reason I buy more expensive no enthanol gas.
