A good quality 30wt is Briggs recommendation
White Outdoor LT2150 with 21HP OHV Briggs & Stratton
if it has one, it will be simple to remove the bolts and pull it off. if it doesnt, then you have to pull off one side of the crankcase.
A 21hp Briggs & Stratton engine may smoke due to several reasons, including oil overfilling, worn piston rings, or a damaged valve seal, which can allow oil to enter the combustion chamber. Additionally, using the wrong type of oil or running the engine at an improper temperature can contribute to smoking. If the air filter is dirty or the fuel mixture is incorrect, it can also lead to excessive smoke. Regular maintenance and proper oil levels can help prevent these issues.
A 21 hp Briggs & Stratton engine typically holds about 1.5 quarts (or approximately 1.4 liters) of oil. It's important to check the owner's manual for the specific model, as oil capacity can vary slightly based on the engine design. Always ensure to use the recommended oil type for optimal performance and longevity.
30wt oil of any brand will work
If it an opposed twin, then an RJ19LM. If it is a V-Twin, then an RC12YC. Either gapped at 0.028 - 0.030"
Briggs 19.5 oil filter
30 weight non detergent.
The 15.5 Briggs does not have an oil filter.
Briggs and Stratton recommends SEA30 oil.
Briggs and Stratton is a select brand of lawn mower. When oiling one's Briggs and Stratton lawn mower engine, it is best to use a high quality oil. One can find such an oil at their local home improvement store, such as Home Depot.
Briggs and Stratton oil must be used for Briggs and Stratton engines. They have both synthetic and standard oil. They have oils formulated for 4-cycle and 2- cycle engines.