will give it a go with some older bolts I scrounge to secure the cowling then and grab a thread gauge and list the sizes here.
Reason I asked was because its not uncommon to buy engine or body bolt kits for car resto's and it often makes life much easier than reusing what could be 40 year old bolts.
As for the 13 hp? im cautious with the 5hp lol, mid range revs/ get her moving forwards gently/increase revs to near governor speeds/ ease down the cutting deck engage lever.
