Ok, I see now.
Yes I agree that my engine was off a key start mower.
Is this is what you have?
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2015/11/full-4730-25139-wp_20151107_001.jpg)
I managed to get a tap to fit the holes on mine, it measured 6mm across the shank with verniers.
The thread is fine thread.
I dont have the exact size and pitch of the tap as the markings are rubbed off.
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2015/11/full-4730-25140-wp_20151107_002.jpg)
If you need info on how to tap, I can post something up, from a text book I have.
cheers