A comment
This season I bought a Plowman motoblock model MKM-3 with an engine LL 168 F-1A. It suits me in all respects and in power, and in compactness, and in weight. Engine oil is at the normal level, but I have not found how much it should be in the gearbox. Topped with nigrol 80W90. Run in, as indicated in the instructions. By the way, the instructions are all detailed with pictures, all point by point, just read. 10 minutes of idling with half a turn, then succumbed to gas and at full power for 1-2 minutes. When the oil darkened, changed. Poured new synthetics from good ones. Last year, he dug up a virgin garden of 20 acres, killed a half of the autumn on it. This year we are milling in the break-in mode - 10 minutes, rest for 10 minutes, processed in a couple of hours. And I have no idea what I did not buy before.
pros
Powerful, economical, compact
Minuses
It is unclear to what level oil is poured into the crankcase.