The engine was made on 19 July, 1988, in Brigg's engine plant in the Czech Republic. That plant has now closed, by the way.
Here is the Illustrated Parts List for the engine:
http://bsintek.basco.com/BriggsDocumentDisplay/Z6ntzHVJ1DajI.pdfHere is the Operator's Manual:
http://bsintek.basco.com/BriggsDocumentDisplay/mssAIQ-K_ny7tH217FzoPu.pdfThe slack rewind cord on the starter supports the notion that it has partly seized internally. If you look at Page 5 of 12 in the IPL, you will see this illustration:
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2014/03/full-2772-15596-briggs_281707_starter.png)
You can see that it has a normal Briggs sprag clutch. This type of starter is prone to squealing, and paying out some of the rewind cord as it runs, when it has insufficient lubrication.
Here is the page from the manual giving instructions for how to service this clutch - note particularly that you place only one drop of oil on the shaft, and ensure that the sprags, balls, and ball compartments are completely dry and clean:
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2014/03/full-2772-15595-bs_sprag_clutch_servicing.png)
I apologise for previously posting an illustration of the pawl clutch, used only on the small engines.
It seems you will need to service it. I suggest you remove it and report whether it makes a difference to the start-up squeal. While it is off, you can lubricate it.