Seat for 1990 312-8.

Not familiar with just what style seat your 312 is, but.... I have 2 1978 "D" series that the seats were really bad on and I didnt want to spend some $150ish on a seat. I had been seeing the ads for 'Temu' on the web (and seeing some 'not so good' reviews) but after seeing several ads for seats from $40+ and up to $70-80 I decided to gamble on one of the $44 ones. Well, I was VERY impressed with the seat and at $50+- with shipping and adjustable... YES!! I promptly ordered up another on at $70+- and again, very impressed with it. Granted, my old horses didnt match up to the seats bolt patterns but with some relatively easy mods I adapted them. Two nice seats for a little over $100 

Thanks for the info, much appreciated. The seat on mine is clearly not an original but was modified to make it work. What mods did you have to make?

This is where these "cheapo" seats are lacking, unlike the more expensive ones that have the multi threaded points allowing ease in mounting, they have 4 threaded points - period, in the seat bottom -- IIRC the seat cross spacing was 7 1/2" - and 8 1/2" frt to back, with multiple holes in the sliders. A side note: it comes with hex head bolts in mm threads that - in my case - the head would NOT allow clearance for the sliders to move, but, a common 5/16 course thread bolt head will allow movement and threads right in the mm threads. Small inconvenience for for a nice cheap seat....

The 'D' models have a different set up over the other models, having a ... car rear type spring? and I had to drill 4 new/different holes as my mounting points were 8" side to side . If your seat is mounted flat then you may have to add a ... off set spacer?? to allow mounting.....

That doesn't seem too hateful. I thought you were gonna say you had to weld on brackets or something like that. I will keep this in mind...thanks!!!

I needed a seat a couple of years ago for my 414-8 and waited to get this seat on sale at Tractor Supply. It is adjustable. I got it for right at $90 if my memory is correct. The seat fit great and slides easily and bloted up to my Horse.

https://www.tractorsupply.com/tsc/product/countyline-universal-compact-seat-black-508000bk-cnl

1 hour ago, Skwerl58 said:

I needed a seat a couple of years ago for my 414-8 and waited to get this seat on sale at Tractor Supply. It is adjustable. I got it for right at $90 if my memory is correct. The seat fit great and slides easily and bloted up to my Horse.

https://www.tractorsupply.com/tsc/product/countyline-universal-compact-seat-black-508000bk-cnl

165 plus tax now

Looks like plenty of room for adjustments to make it fir. Price has gone up though... 

In the next couple of months these will more than likely go on sale due to being off season. That is when I purchased mine. Ordered online and picked up in the store.

21 hours ago, johnnymag3 said:

165 plus tax now

Thats why I kept putting off getting a new seat for my 2 D horses. Last seats I had bought were in the $70 to $90 range from Northern, ebay, etc but geez, seemingly the same seats were now in the $150ish range! I will admit the $40 seat is probably not the best - it is adjustable and seems as good as the other $70 seat.... but it is a tad .... small? If you are a big guy and use your horse a lot then it would not be best choice. The tractor I put it on is my "yard" tractor, no deck just tows a yard cart/trailer picking up limbs/trash etc, so Im not sitting in the seat much. The $70 seat is much more comfortable. FWIW, Temu has several seat choices, even a couple with arm rests and high backs for around $100.