Starter just running free

[Bushman_2]

Every now and again when I push the happy button the PIG's starter starts running but it is not turning the motor. Then after a try or two the starter will kick in and turn the motor and all is well.

Any ideas what to look at?

 

[Welsh]

 

[Bushman_2]

 

[Pavlovski]

 

[Welsh]

 

[Pavlovski]

 

[Jughead]