Briggs I/C (which are similar to old inteks, I think)engines are pretty good. I had one fire right up after sitting for 10 years. New oil and fuel of course.
This video may be helpful
https://www.youtube.com/watch?v=g0DdGmmFaAs
But the truth is, everyone has had different experiences with engines and engine manufacturers, one guy might recommend a Intek engine over a Kohler Courage, someone else might like the Courage over a intek.
I would prefer equipment with a Kawasaki engine, because I have a Kawsaki horizontal shaft engine that has been running for 20 years. Only new p piston rings.original crank,cam and rod. And no major problems.