Posted by James Rumph on August 25, 2008 at 12:15:46 from (24.192.125.175):
In Reply to: Cub verses 184 posted by Buster on August 24, 2008 at 19:08:31:
The engines are the same C-60. I asked this same question on cub.com .
I was told that there isn't any differance other then the pistons ! The pistons have a off set piston pin location from that of a older cub.
The newer motor has higher compression and the rpms are turned up.
Based on the info that was given to me i bought a head off E-bay and cut it. I set it up in a Bridgeport and ended up cutting .060 off the deck , .040 to get it flat and .020 extra.
The results are great, i turned up the rpm 200rpms "wow".
Last summer a friend has a yellow 185 low boy that the motor needed to be rebuilt in , the head and rods are the same as the standard cub .
On hand held GPS the mph in 3rd was 9.8 mph [stock]. Now with the cut head and 200 rpm more it runs in third at 13 mph.
I plow alot of snow with it and really notice the differance and have used it a hole year so far and zero problems.
If you get a chance pull the exhaust manifold off it and look at the mismatch in ports.
My dads was as much as .312 [5/16] off, we port matched to the exhaust gasket. Can't say weather it made a big differance but it couldn't hurt. Seems to run smoother !
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