I restore old lawnmowers for a hobby.
Honda power, every single time. Steer clear of Briggs and Stratton rubbish.
Ours never caused us any issues.
The year after we moved in to the last house, we bought a Mountfield 51cm mower with a 3Hp Briggs & Stratton engine. We had close to an acre and half of land, with probably 2/3 of that under grass, and we used that mower for 20 years, and for most of the summer for the first 18 of those years, I would be running it 3-4 hours per week.
Finally got rid of it when it had some problems, and we were told it would cost about £120 to repair, buy which time we were in the current house which has no need for such a large mower, and were able to get a suitable electric one for £80 (Spear & Jackson). Still quite a large garden for a modern house, but half an hour every two weeks is all it needs.