Cranks over very slow

R

Raporter

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Jun 18, 2019
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I have a 2007 MTD CVT riding lawn mower. the engine cranks over very slowly. I have changed the ballery, starter and solenoid. I have also removed the fenders and cleaned all electrical wire connections. All electrical switches have been checked and are working correctly. Have I missed something?
 
Welcome.
Does it just turn very slow or does it do 1.5 turns almost stop then the another 1.5 turns
 
If it’s on the compression stroke, it might turnover 1/2 turn. If coming off the compression stroke it might turn about 1 1/2 turns, once in a while it will start.
 
Remove the spark plug and crank the engine.
If it cranks over fine without the spark plug but won't with the plug in then you have a compression release problem.
The usual reason for this is excessive valve lash
Adjust the valves ( I use 0.004" each side ) .
IF that makes no difference reduce the inlet to 0.002"
If that makes no different then the cam shaft decompressor is deceased .
 
You need to separate the model, type and code.

Appears to be maybe a OHV Briggs.

Do as bert says in post #4 and then get back to us.
You can find the adjustment procedure on you tube.
 
Thanks to all who helped. The valves were out of adjustment. I reset the valves to .004, the starts like it was new. Again thanks for the helpful information.
 
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