HOw do you tell if the pump isn;t operating properly??

I have the same plane /engine combo as above. I purchased it for 500 bucks plane and YS140DZ , because the motor was quitting during areobatics and deadstick landings damaged the gear/fuse .

When the motor ran , it ran well, but sudden stops...the previous owner ran it on a 16x4 at 10,500 for 1 flight before he someone toldhim that was too much RPM. He didn;t use full throttle , just enogh to fly it. But it even deadsticked then. He went to a 17x10 and it deadsticked and damage.

I am reluctant to rebuild the bottom of this plane and just TRY the motor without knowing what is going on.....

Should I Static test it on a bench ....and try the tuning steps again, or just send it in?? Sound like a mechanical problem in the motor??

It was run at HS 2 turns to 1 1/12 turns.

I got it cheap , and I know that when it is right it will stay right. My 1.10FZ is fine after getting it back from service.

Can;t wait to fly this combo.