Have you been able to find the other seal?
Since the original poster has not signed in since 2016 I doubt if they are going to respond to your question but I will try and help you with some information.
First let me say welcome to the forum - hope you get some useful information from the site.
Second it appears that Bolens Parts And Supplies (a site sponsor) has an equivalent to the 1185629 Bolens seal in stock - fyi.
Having said that I did some research into the 1185629 and 1185630 using an older Victor seal catalog that show both Bolens numbers and the Victor seal numbers they cross reference to. According to the post made by pigseye the CR part number 11343 is too small to fit the 1.25" shaft size which may be the case and the cross reference given is wrong. The Bolens 1185629 crosses to a Victor Seal number 62290 in the cross reference catalog I have. If you go to the CR / SKF website and cross the Victor number it crosses to the CR part number 11343. I looked up the sizes for the Victor part number 62290 and 62303 and the O.D. is the same and there is a very slight difference in the width. The styles are different (single versus double lip) but the biggest difference seems to be the shaft size listed - the 62303 is shown with a shaft diameter of 1.250" and the 62290 is shown with a shaft diameter of 1.125" which on initial inspection would appear to be too small to fit on a 1.250" shaft. However if you read the information provided about shaft size you will learn that a seal that is shown for a given shaft diameter may actually work OK on a larger shaft application and increase what is know as the lip load. Given the application where there would be a lot of dust and dirt around the shaft and seal area I am thinking that the 1185629 Bolens seal was designed to be a very snug fit on the shaft to prevent any debris getting into it and to do an excellent job of sealing the gear lube so it would not seep out past the lip of the seal causing dirt built up from the dust sticking to any gear lube. The outer seal Bolens part # 1185630 is not as tight a fit on the shaft and probably is designed to act as a dust seal to protect the inner seal. With this information I am thinking the 11343 seal (which is shown with a shaft diameter of 1.125" probably will work and as a result would provide a higher lip load on the shaft to do a better job of sealing but be harder to install on the shaft - you might have to wrap a layer of electrical tape over the splines on the shaft and lubricate the area well with oil to get the seal onto the shaft and be careful you don't tear the lip during the process. It seems strange that Bolens would not have made the inner seal the same part number if there was not something different about it and I am thinking the lip load on the shaft is the big difference. If you feel that the 11343 won't work then you could try CR # 11801 ( crossed from a Victor # 64281) which has the correct O.D., a width of .250" and a shaft diameter of 1.188" - this would give you a slightly larger inside diameter than the 11343 but still give a higher lip load than a regular seal listed for a 1.250" shaft diameter such as CR # 12458.
I have attached a pdf of the information from the Victor catalog on the Victor seals I mentioned and the information about lip load in case I haven't explained it well enough.
Hope this makes sense to you and helps you with the part numbers you are seeking.
Edited by 29 Chev, July 30, 2018 - 07:41 PM.