I’ve never seen aluminum grass and why would you want to catch it anyway unless you plan to recycle it since aluminum prices are up. Ha-ha, but seriously each grass catcher is made for a specific unit. I’ve never seen aftermarket grass catchers. Look on Craigslist or Facebook marketplace for...
The difference between a reputable dealer and the big-box-stores is the initial set up.
The dealer will take the time to level the deck, adjust the controls, etc. and make sure the unit is ready to perform.
The bolt pattern on the wheels may be different between the two manufacturers. Measure the mounting bolts center-to-center. Also, the set back on the wheels may be different, causing rubbing against the frame if not correctly sized.
No. Drilling the crank is definitely NOT the correct course of action. Contacting the B & S rep is the way to go. Allowing B & S to trace the issue back to its source will address the issue properly. And, you’ll get a new engine for your efforts.
Check the float levelness. Remove the carb and float bowl. While holding it upside down, the float should be parallel with the mounting surface. If not, the fuel in the carb bowl will deplete faster than it can be replenished. Replace needle and seat to correct this.
At one time Sun Oil and CITGO made it for them. Not sure who makes it now. There is a compound blender in Combined Locks, WI by the name of U.S. Oil that could be making it for them.
When installing a new PTO clutch it has to be burnished in, according to instructions with the unit. Also, there is a specific gap between the clutch segments that can be adjusted. Too big of a gap and the clutch may not engage fully.