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Hi All, Here is the details: Briggs&Stratton Professional Series 8.75 HP
Model 121S07-0167-F1 Serial number 17 0518 56 33476
DOM May 2017
I picked up a DR Power Wagon Pro XL With the above mentioned engine.
I am having a hard time finding any info on this engine other than a parts list.
The engine runs lite a top but I have some questions.
What is the oil capacity for this engine?
What champion or NGK spark plug?
This engine is electric start. Does the engine have an alternator?
If so, What should be the the voltage be across the battery at full speed?
When I start this engine it starts right up as if fuel injected.
It is also relatively quiet. I'm really impressed with it.
Thanks for your time , Matt.

Champion RC12YC
It's not fuel injected, but it most likely has the autochoke feature.
Oil capacity according to the briggs website is 0.6 liters
the engine should be equipped with a 0.5 amp (@2900rpm) DC unregulated alternator. This is usually just enough to maintain the battery while running.