OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Briggs & Stratton Engines Briggs 191702 on Cox Ride-on

I agree your current carburetor is a medium 2-piece flo-jet



There are very few illustrations of vertical crankshaft 190000 engines in the manual, they are mainly horizontal, and have the large 2 piece flo-jet:



However there are some illustrations of the horizontal crankshaft, cast iron 190000 with the medium 2 piece flo-jet



(That isn't very relevant since your engine is aluminium).

Finally here is a rather enigmatic drawing of a 191700 like yours that seems to have a large one piece flo-jet:



I suggest you have a look at this in context, in the overhaul manual here:

http://www.tpub.com/content/recoveryvehicles/TM-5-4240-501-14P/css/TM-5-4240-501-14P_139.htm

The previous few pages, and that one, are the sources of the preceding illustrations. If you can break the code on the B&S way of expression, you can probably find the actual answer. Meanwhile it seems your engine has a B&S carburetor, but whether it is the right one is unclear. It certainly has the wrong inlet pipe and exhaust pipe.

Incidentally, and completely off-topic, your engine also has the reciprocating synchro-balance mechanism to make it run with less mechanical vibration. It seems to have every complicated mechanism B&S made at the time: kind of a top of the line model for keen mechanics to practise their skills on.