My gas cap on 5hp briggs went bad. What's on it is This. It is intended for 2-4 hp engines. I can upgrade to one of These for 5-11 horse engines. I want it to look original but if the 5-11 horse cap is better I will happily switch.
The 5HP Briggs uses the same gas cap as the 2-4 HP regardless of what that Amazon ad states. You want Briggs part # 298425 which has been superseded to # 493982S. (Do a search on eBay using that #) I would recommend staying with the actual Briggs OEM brand, not the aftermarket ones. In the past I have purchased some of the latter and about 1/2 of them leaked.