heres my issue i have the mercury 1150 its a 1972 about a week ago i put it in the water to go fishing and it ran for about 3 mins then just died and wouldnt start back up so i got home and started looking at possible causes. i did do a compression check which all where 135psi. changed plugs out with new ones, also looked at the fuel pump which the diaghram was ripped so i got the rebuild kit and fixed it. checked the timing and its still good as far as i can tell. recleanded the carbs thinking that maybe the piece of the ripped diaghram went into one of the carbs(picture below of the ripped diaghram) is it possible that that piece might have went inside the engine and got stuck on one of the reed valves. cause its still not starting it will spitter and maybe run for 30 secs then die again. if anyone might be able to help before i take it to the shop and save me some money id appreciate it a lot. thanks