Cub Cadet 1863 Question?

   / Cub Cadet 1863 Question? #1  

leftybob

Bronze Member
Joined
May 9, 2006
Messages
52
Location
Barnhart, Missouri
Tractor
Ford-1100- New Holland 1720 - JD-345- JD-425- Cub Cadet- 1863
Can anyone tell me if the 18 HP Kohler Command engine has a compression release in the engine? When the choke is pulled out the engine gets harder to crank almost like a out of time mode. After it finally starts witha lot of cranking it runs fine.
 
   / Cub Cadet 1863 Question? #2  
My 1864 does this sometimes too, but it's got a 700CCA battery in it so it gets through it :)

-Larry

leftybob said:
Can anyone tell me if the 18 HP Kohler Command engine has a compression release in the engine? When the choke is pulled out the engine gets harder to crank almost like a out of time mode. After it finally starts witha lot of cranking it runs fine.
 
   / Cub Cadet 1863 Question? #3  
No compression release on the engine. Any engine will sound and crank a bit different when choked or at different throttle settings, not sure exactly why this is. If the starter labors just because the choke is out you either have a bad starter (not likely) or a bad battery. How old is the battery, and is it sized right for the tractor?
 
   / Cub Cadet 1863 Question?
  • Thread Starter
#4  
The battery had been changed to an auto type with top posts before I bought the tractor so it has more cranking power than a lawn & garden battery. It cranks good until the choke is applied. I tried to close the choke about half and it still slows down the cranking.
 
   / Cub Cadet 1863 Question? #5  
Theoretically, closing the throttle or the choke increases the engine vacuum and requires a little more cranking power, but I'm surprised it's enough to notice.

Bob B.
 
   / Cub Cadet 1863 Question? #6  
The Command engines do have a compression release system. From what I understand it is mounted on the camshaft and is a spring loaded rod that holds one of the exhaust valves open a little bit during cranking. I have heard of a few instances where these have broke or worn and that sounds like your case.

-Fordlords-
 

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