39A, 24A D4C, 60A and 72A 955H used the same starter motor, I reckon the D6B and 977H also used the same base unit, I believe the recoil start cables will be all the same.
The parts book for the early D6B 44A shows the spring assembly to be 2M7846.
Unless he wants it for a collector take that buzzbomb off and throw it in the scrap pile.I changed mine over to a 12 volt starter and works great.Cost me $140 for a rebuilt starter and it bolted right up,and put a 4D battery in it.
He will also need new pre-chambers and glow plugs if he wants it to start reliably without ether.
Been 15 years now and used ether on it all that time.Not a fan of ether but go light with it and won't be a problem.Worked for a cat dealer and changed over a few pre-chambers to glow plugs and thought it was a waste of money.Pre-chamber engines seem to tolerate ether better than direct injection engines.
There you go again EL300B, booting the "Buzz Bomb" to the curb. Not nice, not nice.:whoo: