Mower Deck Drive Belt Size

Fri Jun 07, 2013 11:42 am

I am sure that this question has been asked a hundred times and that the answers are already posted somewhere, but I can't seem to find them. What size mower deck drive belt does my 1250 with a 38" deck use? Is the belt a different length than the same tracror with a 44" deck? My auto parts store said that the old belt was a 1/2" when I took it in. My understanding was that these tractors used a 3/8" belt. Anyway, thanks in advance for the help.

Loren H. :? :?

Re: Mower Deck Drive Belt Size

Thu Jun 13, 2013 11:26 am

Hello, According to ... s/logo.gif the deck belt is a 1/2 x 72" They don't give the size for the drive belt but they list an IH part number, 478881-R3. I went to the NAPA cross reference and that came up with this - 3VX850. Hopefully that crossed correctly, it's a .375" (10mm) x 85" belt. The Cubcadet look up shows the 42" and the 38" deck use the same drive belt. For what it's worth I use the A series Power Master belts (1/2" belts) that Gates makes for both the drive belt and the deck belt on my 104 Cadet which is also supposed to use a .375" drive belt. They work very well and last a long time. NAPA, Carquest, and others sell the Power Master belts. Places like Tractor Supply don't seem to handle them, they definitely do not stock them.

Hope that helps you out.