I would think it would be doubtful that it would be bolt on.
I am in the process of mounting my 36 blower on one of my 3813's. I was hopeful it would fit instead on my 4514. It will not without modifications to some of the the brackets or unless I fabricate new brackets.
You have to consider how the blade assembly bolts to the underside of the the frame in addition to the lift handle and brackets and counter weight springs. I guess you can make anything fit if you have the tools to fabricate all of the parts to make it work.
My question is if a blade is of any use on such light tractors like the 3000 and 4000 series Hondas.
The blade is only a push blade. You aren't able to load this blade like a blade that is hydraulically controlled like those on John Deere 300 and 400 series.
With those you hyraulically force the blade down by the weight of the front end of the tractor. Apply enought downward tilt/pressure and you will actually lift the front end of the tractor off the ground.
A push blade essentially rides the ground surface on runners with only its own blade weight to hold it down on the surface.
So unless it a direct bolt on - do you want to chance a lot of extra fab work to get it to fit only to be disappointed because the unit doesn't push snow like you expected it would?
You see a lot of John Deere brand spanking used but new push blades on ebay and Craigslist for the Lowes box mowers and pretty cheap - compared to 20 year old John Deere 300/400 series hydraulically controlled blades which still bring between 500 and 750. I suspect because they don't push as much snow as people expect them to.
I will also be mounting a small push blade on the my other 3813. I got it for free. It is a Simplicity - fabbed to fit a 3813/4213. I'll let you know how it works if it ever snows here in Kansas.
I got these two units (3813's) so cheap - I plan to just leave them as they are -blade on one, blower on the other.
I'll be posting some pics as I do the install. Here are some.
http://www.flickr.com/photos/[email protected]/sets/72157628439440313/show/