13HemiRam 20 #1 Posted May 22, 2017 (edited) Hi guys, I'm new to the forum and have been using for research for a few months so I figured I'd sign up! I just picked up a fairly nice 1984 C-175 auto with the kt17. Unfortunately it has some rod knock. My question is, how much work would be involved in swapping a k241 10hp kohler from a 1985 310-8 that I have sitting around? Is this a doable swap? I know I'll have to remove the mounting plate and probably rigid mount the motor to the frame (it looks like there are mounting holes in the frame in the same location as the 310). Is this worth it to use a 10hp or should I try to find a different engine, say a 16hp k series? I have a raider 12 swapped with a rebuilt 16hp and a C-100 also so I'm pretty familiar with the k series and I'd like to stick with that if possible. Any info is greatly appreciated! Thanks! -Justin The 175 and the possible 310 donor Edited May 22, 2017 by 13HemiRam Pics 2 Share this post Link to post Share on other sites
SylvanLakeWH 24,118 #2 Posted May 22, 2017 Love them Black Hoods! Folks will be along shortly who can answer your Q's... Share this post Link to post Share on other sites
953 nut 51,630 #3 Posted May 22, 2017 Having both tractors right there makes this a simple swap. If the "C" is an eight speed you can use the engine pulley and all from the 310, if it is a hydro you will need to get a larger drive pulley (A-Z Tractor can hook you up) and use the 310 PTO on it. Put the twin cylinder Kohler on the classifieds here and someone will come along who needs one to rebuild. 3 Share this post Link to post Share on other sites
13HemiRam 20 #4 Posted May 22, 2017 Is there a difference in the two pto's? Between the one on the 310 and the one on the c175? They look almost identical. And yes the c175 is automatic and the 310 is an 8 speed Share this post Link to post Share on other sites
Racinbob 10,276 #5 Posted May 22, 2017 The differences will be in the brackets mounting it to the engine. Assuming the 310 is complete you have all the parts so no worries. As you mentioned, you will mount the 10hp directly to the frame. That's the preferred method. If you don't already know, the right side mounting bolts come up from under the frame. It will be a real straight forward swap. 1 Share this post Link to post Share on other sites
953 nut 51,630 #6 Posted May 22, 2017 5 hours ago, 13HemiRam said: Is there a difference in the two pto's? Between the one on the 310 and the one on the c175? They look almost identical. And yes the c175 is automatic and the 310 is an 8 speed The crank shaft on the two engines may not be the same size. Also as Bob said the attachment to the engine isn't the same. Share this post Link to post Share on other sites
13HemiRam 20 #7 Posted May 23, 2017 On 5/22/2017 at 6:34 AM, 953 nut said: Having both tractors right there makes this a simple swap. If the "C" is an eight speed you can use the engine pulley and all from the 310, if it is a hydro you will need to get a larger drive pulley (A-Z Tractor can hook you up) and use the 310 PTO on it. Put the twin cylinder Kohler on the classifieds here and someone will come along who needs one to rebuild. Just curious why a larger drive pulley is needed because it's hydro and is it the drive pulley on the engine or on the hydro pump? Share this post Link to post Share on other sites
953 nut 51,630 #8 Posted May 23, 2017 Not a hydro engineer, but I believe the reason for a larger engine pulley is the design requirements of the pump and for cooling. Share this post Link to post Share on other sites
13HemiRam 20 #9 Posted May 23, 2017 That makes sense. I guess if the other engine has a smaller pulley it would spin the pump too fast Share this post Link to post Share on other sites
EricF 589 #10 Posted May 24, 2017 Other way 'round, actually. The smaller pulley moves the belt a shorter distance (slower) for every engine revolution. The larger pulley moves the belt faster, to spin the hydro pump and fan a little faster. 2 Share this post Link to post Share on other sites
13HemiRam 20 #11 Posted May 24, 2017 Oh wow I should have known that! Duh! Anyways, I'm hoping to get started soon on getting things swapped over. I'm sure I'll have some more questions but I should be off to a good start for now. Thanks guys! 2 Share this post Link to post Share on other sites
13HemiRam 20 #12 Posted June 26, 2017 I noticed this on the side of the engine while I was trying to get the drive pulley off the 310. It looks as if someone already swapped a 12hp onto the 310 at some point Another question...I got one of the set screws out of the drive pulley and the other one was already part way out and the head is stripped so I can't do anything g else with it at the moment...what's the best way to go about this? Share this post Link to post Share on other sites
oldredrider 2,547 #13 Posted June 26, 2017 The K301 on the block does NOT indicate that it is a 12hp. It means it COULD be bored to 12hp specs. Streamlining casting costs for Kohler is the reason for it. As for the stripped head on the set screw, you MAY be able to drive (hammer) a larger size Torx head wrench into it and remove it that way. I recommend you soak it long and well with a good penetrating fluid...NOT WD-40. Use Kroil, PB Blaster or BG Inforce. Share this post Link to post Share on other sites
