I forgot to say that there are two crankshaft seals (#40) -- one on top, one on the bottom.
I'm very curious about how your Lawn Boy got to Kenya. If you talk to a mechanic or parts dealer, could you ask if they were ever imported?
On the metal tag with the model number, is there a city name -- where the mower was made?
Sorry for the late reply. On the plate is written "Outboard Marine Corp. Bruges Belgium". I doubt if they were imported back then, most likely he brought it home with him (he used to tour different countries) from Europe.
A mechanic will be coming to look at it this Thursday, so we'll see how it goes.