Originally Posted by dutch1
That's a revelation to me--that Toro ever produced a BBC that was Tecumseh equipped. I spent 7 years in a Toro shop from the late 90's to the early 2000's and never saw one in the shop. Rather surprised that a Tecumseh of that age is still running--you must have given it exceptional care.
It's just me but I would set it at 3000 under load(blade engaged) and be done with it. On the other hand, if you're still on the unaltered original engine, leave it as it has been.
The engine I have on my '84 Toro is the original one from the factory.
But my next question is this: has anyone tried to bend the governor spring whilst the engine is running? This is where it becomes a two-man job: one man would be holding the handle bail bar (so as to verify the top speed with blade spinning), and the other would be performing governor adjustments.