The i4500 engine is a Chinese copy of the Honda GXV140. The pull start is one of the few items that is not a precise, interchangeable copy of the equivalent Honda part - in fact it may vary between different brands of chonda engines. Please post pictures of the pull start so we can understand your post better.
You may find this thread on an i4500 engine useful:
https://www.outdoorking-forum.com.au/forum/u...mp;Words=i4500&Search=true#Post57355
