Strange Carb found

JDT · Post by **JDT** » Sat Jan 12, 2008 7:26 pm

Pulled a 1974 JDX4 Special into the shop today and found a Tilletson Carb under the shroud. If that is not strange enough this Tilly has a return line. Never seen that before!
Number is HD-40B. Anyone have any input on this? Thanks, Todd

JDXspec · Post by **JDXspec** » Sat Jan 12, 2008 10:57 pm

a 74 X4 special should have a bendix carb. carb kits are hard to come by so I suppose they put a tilly on it. Not familiar with the tillys much but the walbro as used on many deeres did use a return line.

JDT · Post by **JDT** » Sun Jan 13, 2008 10:48 am

Ok so I just saw another of these weird Tilly's.
On a JD 400 ebay item # 260202635156.
Not the return line....
Still wondering what the 40B was used on originaly.
Todd

JDFanPa · Post by **JDFanPa** » Sun Jan 13, 2008 11:24 pm

I have 2 deeres with tillys 1 came with and the other I threw on to get the sled running. They actually work about the same as the walbro but you cant hook the choke up. I have had my hands on atleast 100 tillitsons over the years and probably 8 out of 10 do have a return. Seems to me the no return carbs are most common on the smaller hr series carbs and on hds used on 1 lungers also most of them without the return have a plug where the return fitting could screw in. Not positive but thinking a 40b may be a ski doo or cat carb.

S_Kyle · Post by **S_Kyle** » Mon Jan 14, 2008 3:00 am

I will check tommorow but I thinkthre is one on my 69' snow cruiser.

Spitfireguy · Post by **Spitfireguy** » Thu Jan 17, 2008 11:01 pm

i had to put one on my 300 to get it going. the walbro was a junky carb and i lucked out and found a tilliston with the return that bloted right on nicly. she runs good now.

JDT · Post by **JDT** » Fri Jan 18, 2008 2:03 am

Is your carb a HD-40B? Do you know where it came from?
Thanks, Todd