I have a 357 Briggs & Stratton that I want to get rechambered too 377 B&S. Is that possible and if so how much work is it?

Thanks in advance, Mike

Mike you are hopeless. The 375 B&S and the 375 Briggs and Stratton are one in the same. The 375 B&S4S is however the 375 Briggs and Stratton Four Stroke. Hope this helps clear up the matter. BTW, the 4S also has the appropriate cutters on the reamer for the oil retainer rings.

Personally, I'd just rebarrel to 380 Tecomsah.

Just be sure to get the appropiate gas piston. B&S claims that the Iron bore piston and the Aluminum bore piston are the same and they are NOT. A buddy of mine got a brand new 6 because of their mistake when his bore was completely destroyed. derf