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Rebuilding a C263 to a C291

D

dan osborne

Member
I picked up a real nice 656 gas tractor with just 895 origional hours. The problem is that it is bad stuck. Has sat outside without muffler being covered. My question is, can this block be fitted with C291 sleeves and pistons? If I have to go into it, I think I'd rather put in the larger pistons if possible. I'm hoping the bearings are good and it appears the seals don't leak because it is clean underneath. Is this as easy as a 263 rebuild or is there more to it? Also, I prefer to run it on propane, so what has to be done to the head, or is it different, and are there different pistons for propane? Thanks in advance for your replies!
 
i am a red power distributor and i can get you the kit. you can't just use a c-291 kit because the sleeve flanges aren't big enough.
 
I dont know why you would want to do that .I have a 656 with a 263 and a 666 with a 291 and i like the 263 a lot better. I dont think you can make a 291 out of a 263 isnt the 291 a longer engine? The 291 has a different exhust manifold and it also uses more gas. The 263 is just such a nice running engine and also not as noisy.
 
Yep ya can , BUT there is a lot more to it then just boring the block and stuffen sleeves and pistons in .as for propane here i do not know what is involved as i don't mess around with it.
 
You will have to bore the block to make it a 291. I was gonna do that but never did it. I have a nos M&W piston and sleeve set that are still in box. I would sell if you are interested. I believe thy are high compression lp pistons. Good luck on your project
Bob
 
Annother way to go is just take 263 out and put a 301 in it. All you would have to do is take front cover and rear plates of your motor and and put them on 301. If motor froze if water in sleeves it may be cracked and not worth replacing. I also have a 301 out of 715 combine I would sell. Was going to use it for a puller but never did
 
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