Welcome to the forum, cfsimon927 !
Want my best guess?
Think it's possible that you're running slightly too much oil in the crank case? I ask this due to a friend who has an older B&S that complained of the same problem and he ran it low to see it it would drop anymore than it did. Yep, his dip stick was a liar. Never used any oil after that.
His was siphoning through the vacuum into his foam/paper filter element in the air cleaner. Hardly noticeable at first. We punched a new mark on his dip stick and he never had another problem.
I hope it's something simple. I'm sure others may have a better response than mine
...
Want my best guess?
Think it's possible that you're running slightly too much oil in the crank case? I ask this due to a friend who has an older B&S that complained of the same problem and he ran it low to see it it would drop anymore than it did. Yep, his dip stick was a liar. Never used any oil after that.
His was siphoning through the vacuum into his foam/paper filter element in the air cleaner. Hardly noticeable at first. We punched a new mark on his dip stick and he never had another problem.
I hope it's something simple. I'm sure others may have a better response than mine