auto increment loop not working

Projects Programming
7

for (int timer = 0; timer < 15001; timer++)
{
if (timer/1000){
pumpClock++;
}
if (pumpClock < 12){
// Serial.print(pumpClock);
}
else {
// Serial.print(pumpClock);
}
if (pumpClock==16){
pumpClock =0;
timer=0;
}
Serial.print(timer);
Serial.println("");
}

the timer seems to be resetting at 1014, this is odd? any ideas as to why it would reset at 1014 and not