Engine Blocks ?

jbollis · #1 02-19-2010, 09:43 PM

I was not sure were to list this so here it is.

I have been looking for a bigger single cylinder to put in place of the 12 hp in my 1211. I am alittle confused on the blocks. Some people have told me there are wide and narrow blocks,and some have told me that just the oil pans are different. I have found two 14 hp's and one 16hp. Can someone give me the lowdown on what I need to know,look at,or for,to make sure the one I get will work for me?

I always assumed they(kohler's) were all the same,per respected hp, and didn't matter what they came in.

Yosemite Sam · #2 02-19-2010, 10:40 PM

Can't say about your 1211, never had one... IH built Cub Cadets had the narrow blocks with narrow pans, Kohler does/did make wide block engines in the "K" series, there are also a variety of pans for a wide range of applications. Once again not sure about your application, but there are a number of different crank shafts (diameter and length) too.

For a "clean bolt in" get the same style block and pan. If you don't mind doing the work you can put anything you like in there.

Good luck.

jbollis · #3 02-19-2010, 11:00 PM

Well I would imagine that my 1211 would have the same block style as any other cub cadet.

This is what I do know. The stroke is the same an the 12-14-16 but the bore is different. The same oil pan should fit all 3. the head is the same on 12-14 but diff on the 16. Dont know about the fly wheels. Cams are pretty much interchangable between the 3. I would have to guess the fuel pumps,ignition,electronics,and bolt ons are the same.

But I just don't get what the difference in blocks are between the wide and narrow. Obviously one is wider then the other. I don't want to sound stupid,I have tried to find this info. I just don't know.

Yosemite Sam · #4 02-19-2010, 11:22 PM

The wide blocks are made very much like a K 141, K 161, K 181 only bigger.

#5 02-20-2010, 12:21 AM

I personally don't care for the singles but I did have a 1210 which should have the same Magnum motor you have in yours and it was far and away a smoother motor than the K motors. Also know that if you use a K motor you will need to swap ignitions also, alter or replace your harness and switch....also I think the safety switches are wired differently.

Scott

#6 02-20-2010, 12:23 AM

Quote:

Originally Posted by jbollis

I was not sure were to list this so here it is.

I have been looking for a bigger single cylinder to put in place of the 12 hp in my 1211. I am alittle confused on the blocks. Some people have told me there are wide and narrow blocks,and some have told me that just the oil pans are different. I have found two 14 hp's and one 16hp. Can someone give me the lowdown on what I need to know,look at,or for,to make sure the one I get will work for me?

I always assumed they(kohler's) were all the same,per respected hp, and didn't matter what they came in.

No, you need to look at the spec number...shaft stubs will be different among a couple of other things.

Scott

jamesm · #7 02-22-2010, 02:50 PM

The basic blocks and oil pans are the same. The problem you will have is the 1211 PTO end of the cranks are 2 28/32" long X 1 1/8" dia. The older cub K-series the cranks are 3" long X 1" dia. You could probibly use a PTO clutch for the older cub motor and wire a points and coil ignition switch.

jbollis · #8 02-22-2010, 04:57 PM

Actually I have found that there were 2 different styles of blocks made. A wide base and the narrow or straight base (cub style). But the wide base can be easily modified into a narrow base.

For the oil pans there are several different ones. The wide and narrow. Then there are cast iron and aluminum versions of both. Then there are the shallow 1 quart and the deep 1-1/2 quart pans. The wide base pans will not work in a cub ( atleast on mine).

But really all I was looking for was the difference in blocks. The 12 horse in my 1211 is nearing time for a freshen,and I am going to use either a 14 or 16 hp block to do it. The cranks are the same for the 12-14-16-18 hp, as far as stroke and bearing surfaces go. So if I go to the 14,all I need is a 14 horse rebuild kit,and a cam.I would probly go with a 16hp cam. And if I decide to spend the high dollars on a 16 hp block,I would need a rebuild kit,cam,and head.

All the blocks can be used with electronic ignition,but only the older blocks were made to accept the points style. I will probly try to do allot of the same things that were done on the KILLER KOHLER build. Only on a 14 or 16 hp instead.

The web site mentioned in a post above,doese a very good job explaining all this.

TEET · #9 02-22-2010, 05:25 PM

I put a K341 16 hp from a wheel horse in my 1211......I swapped the oil pan, crank, and the flywheel as the WH crank was too long. The drive cup mount from the M12 wouldn't work with the wheelhorse crank or flywheel either as it wasn't internally threaded. Took a little bit of trial and error, but it went together quite well....

jbollis · #10 02-22-2010, 06:02 PM

Good.
That is pretty much what I want to do,use everything I can from the mag12 and put it in a most likely 14 hp block. Then I wont have to find a head. I will just use a good rebuild kit and a 16 hp cam. And with a little work the #26 carb should work good on the 14hp,as it wont see many high rpm's plowing snow.