Jet pump
Hi again, yes thanks for the tip, pulled the jet pump unit off, cone cup was cracked and empty, impellar siezed., I tried to pull the shaft out but could not. Rolled engine just to see if it would roll (without starting) and it did! So I believe it must be the jet pump. I suspect that the simplest thing is to just get a replacement unit (rebuild or new)? Seems you would need special puller and tools, so best leave it to the shop to do. Thanks again for all your help. Thing is I have a twin GTX. Both got dumped off their lift in brutal storm 4 years ago, but I rescued them and ran them until now. I thought the other one was a bad engine but after looking its likely a bad pump too.
ALL the Best
Brian C