motor only turns a 1/4 turn then starter wires get hot and smoke

Jammer48

Member
Joined
Jul 8, 2021
Threads
7
Messages
40
  • / motor only turns a 1/4 turn then starter wires get hot and smoke
Ok I have Cub cadet 1440 with a B&S 294447-0445-01. I needed to change the head gaskets on this mower and reset the valve clearance to spec. Now when I turn the key the motor only turns a quarter turn and stops. If I turn the key again it will still only turn a 1/4 turn and stops. I needed a new battery because the old one under a test load was showing very weak so I got a new battery. The starter seemed weak with the new battery so I tested it and it would only start on occasion. So I replaced the starter. I also have a new solenoid and its still doing it. I thought maybe I set the valve clearance to tight so I loosened them and still the same thing. What am I missing that could cause this
 

Scrubcadet10

Moderator
Staff member
Joined
Sep 24, 2017
Threads
265
Messages
6,614
  • / motor only turns a 1/4 turn then starter wires get hot and smoke
.004"-.006" both valves on each head, correct?

(thanks for posting the model info first, not many do that and it makes it easier to help)
 

Jammer48

Member
Joined
Jul 8, 2021
Threads
7
Messages
40
  • / motor only turns a 1/4 turn then starter wires get hot and smoke
I am going to reset it now to .004. I removed the plugs and the damn thing turned over like a champ. So I agree it must be the valve clearances. I'll get back to you in a bit.
 

Jammer48

Member
Joined
Jul 8, 2021
Threads
7
Messages
40
  • / motor only turns a 1/4 turn then starter wires get hot and smoke
I can't turn the motor by hand. I used to but now I can't. I am done for the night. Every time I set the clearance with an allen wrench and then tighten it down and I recheck it, it's loose. WTH? I must be doing something wrong.
 

bertsmobile1

Lawn Royalty
Joined
Nov 29, 2014
Threads
65
Messages
24,995
  • / motor only turns a 1/4 turn then starter wires get hot and smoke
Yes you are setting them backwards.
IT catches a lot of of people , particularly old farts like me who grew up with manual tappet setting so are used to adjusting the lash at the valve stem end .
Mower engines set the gap from the pivot point .
The NUT is what sets the gap and the allen screw is the locking device .
If you ake the whole thing apart you will see the bottom of the nut is balled to fit in the cup of the rocker
 

Jammer48

Member
Joined
Jul 8, 2021
Threads
7
Messages
40
  • / motor only turns a 1/4 turn then starter wires get hot and smoke
ok Thanks I will try that tomorrow. I hope I am getting it at TDC on the compression stroke correctly.
 

Scrubcadet10

Moderator
Staff member
Joined
Sep 24, 2017
Threads
265
Messages
6,614
  • / motor only turns a 1/4 turn then starter wires get hot and smoke
ok Thanks I will try that tomorrow. I hope I am getting it at TDC on the compression stroke correctly.
i set valves with one open and 1 closed... adjust the closed valve.
exhaust valve open,adjust the intake. vice versa.
 

hlw49

Lawn Addict
Joined
Jul 11, 2021
Threads
41
Messages
1,575
  • / motor only turns a 1/4 turn then starter wires get hot and smoke
Setting the valves too tight will not cause the problem too loose is what would cause it. sounds like this may be what U did
 

Jammer48

Member
Joined
Jul 8, 2021
Threads
7
Messages
40
  • / motor only turns a 1/4 turn then starter wires get hot and smoke
Yes you are setting them backwards.
IT catches a lot of of people , particularly old farts like me who grew up with manual tappet setting so are used to adjusting the lash at the valve stem end .
Mower engines set the gap from the pivot point .
The NUT is what sets the gap and the allen screw is the locking device .
If you ake the whole thing apart you will see the bottom of the nut is balled to fit in the cup of the rocker
Wow ok I will try that. Man i screwed this up. So once i have the gap set your saying I hold the nut and tighten the allen screw to secure that setting?
 

Jammer48

Member
Joined
Jul 8, 2021
Threads
7
Messages
40
  • / motor only turns a 1/4 turn then starter wires get hot and smoke
So I got a battery from walmart with 650 cranking amps. Is that enough cranking amps?
 
Top