Got back to the lake again, changing the fuel pump diaphragm didn't did any difference, this time I went with my father, he knows some mechanics he suggested to open the carb needle a little bit I didn't tried that before because it idled good and I thought that needle only worked in idle, anyways they were close to 1 turn and we got them to 1 1/4 turn it immediately felt better I was able to manage 2000 rpms before stalling, If I kept trying to accelerate the motor stalled, I opened them another 1/8 of turn and I was able to accelerate a bit more didn't stalled but still didn't felt very good, I stopped there I went also with my 3.5 year old son and wanted to have him on the boat and try to fish something, so we did some trolling and he finally saw his first bass! I will keep now tweaking the carbs for next time, maybe do a full clean up and then adjustments.