Where is the pump is it next to the oil filter ?? This is not a TD its a 300D this is our 2nd 75 300D any time we have had problems its always been fuel somtimes just a small line leak cant find leaks any place this was being drivemn on the hwy from FL. it ran fine than started to loose power and die now after priming it only runs about a min it will try to restart but if it dones runs 5 sec or so if you go through the air bleed again even bleeding at the pump it will run again any where from 1 to 5 min than die all the filters are new the tank has been cleaned and strainer cleaned ( biggest allen wrench i ever seen ) Any way i dont remember seeing any air bubbles in the clear filter however when you pump the primer you can see it move fuel when you push down ,and when you let it up looks like it sucking back and mabe a little foamy when this happend on the first one we had it ended up being a $1.00 piece of hose