It has the J1223 on itMy parents used it all last year and said no problems at all until they went to pull it out of the lake to store. So it ran fine all last year and runs fine once you get it started that is why I am so confused. I will get the serial number off... Fuel pump is new and so is filter.
Makes sense. Will take a look tomorrow evening. I appreciate it in advance!I assume it is a newer (1996 and up) vortec with electric fuel pump. The fuel pump gets powered I think off a lug on the starter for cranking and then once key goes to run it gets 12 v off the ignition circut through an oil pressure switch (closes at 4 psi- engine not running = no oil pressure= no power to fuel pump).
One of the smaller wires Yellow/purple) coming off the starter soleniod is where the power comes from- likely either the starter contact is no longer good or you have a loose or corrdoded wire. Once you prime the carb with fuel by jumpering it and the oil prssure switch supplied 12 v takes over it runs.
If your carb bowl is empty from sitting no fuel is availbe and it wont start if fuel pump isnt running during cranking...Either trace out wire off the starter or you can wire a momentary switch to bump the fuel pump for starting and fill the bowl...basically what you are doing now but splice it into the harness...