Once started it runs like a champ,idles smoothly, accelerates fine and once started then shut off it will restart immediately but it seems the longer I wait the harder the restart ??!! New plugs,gas filter, bulbs hard, ect. I give it 1/4-1/2 idle and I choke it and choke it for 5-10 mins and nothing then in frustration I give it a shot of starter fluid and BAM she starts right up and runs smoothly. Obviously there's an issue with it getting gas to start up I think! I did have a problem with another 15 hp motor and it ended up that the butterfly was closed so not enough vacuum to draw in the gas but I don't think that's the problem. It was suggested that I install a 12v fuel pump but I wouldn't know which one or where to put it in the line plus I think that the vacuum to the fuel pump must be working fine or it wouldn't run so good after starting. I'm puzzled !? Any geniuses out there? LOL