B1700 starting problems

[orange1021]

Have a Kubota B 1700 that will sometimes turn right over, other times get a clicking sound, after several attempts it may start, if not I pump the "clutch" and it finally turns over and starts. Battery has proper voltage. what is causing this clicking sound and why does the tractor start right up at times and other times need to try over and over, including fast pumping of clutch. tractor is hydrostatic.
thanks,
Del

 

[Bulldog]

First thing that comes to my mind is a safety switch.

 

[orange1021]

Bulldog...after I posted this problem, I noticed the same thing posted by buzter and have been following that post. I did bypass the clutch safety switch and it didn't seem to make a difference. Trying to test the solenoid to see if that is the problem. I'm not a real mechanic but want to narrow the problem down before I take to Kubota shop