my 32 ate 2 bosch pumps,
some debris in the fuel kiled one randomly, usual noisy symptoms, surging ect.
replaced it and all was fine for a bit then that one went too.
i had miniscule particles in the fuel, took the tank out and had it cleaned, new pump (different brand) and all was well.
i couldnt even see anything on the mesh but its the tiny bits that got into the pump. kills them fast.
be wary of sticking another pump in, what killed it last time may take another out. check your fuel and tank, at least flush it, all new fuel, new fuel filter too.