Toro 22" Recycler with Tecumseh engine not developing full power

My Toro 22" Recycler with Tecumseh engine & carburetor doesn't seem to be developing full power. It seems like it is may be leaning out. I think I found the problem the 2nd time I took the carburetor off.
This should be real easy to fix with a new carburetor kit.
BTW: I should mention what those two O Rings on the Main Nozzle do (what they seal off). Bleed air is allowed to come into the well around the nozzle. This air comes from inside the air inlet of the carburetor (in tractor carburetors, this is called "bleed" air). This air then can pass into the nozzle through small holes. This is a means of leaning out the mixture at high speed. Exactly the same as old tractor carburetors.

[@bryanh1944FBH]

Look in the description for what these O Rings do and why they are important. I should have covered that in the video. But, the O Rings seal the air bleed from the fuel. Just like old tractor carburetors.

[@emf786]

Hey Bryan! Your carb knowledge is spot on. What is your opinion on using propane to power a pushmower? Just a small green torch.Unscrew the burner and run a small hose directly in past the butterfly. You have to drill a small hole in the air box for the hose. The torch valve is the throttle control. Just make sure there is NO gas in the tank or carb. Just curious. Best Regards from The Empire OF Dirt.

[@bryanh1944FBH]

Hi EMF! First, the mower sure works nice now that those O rings have been changed. I have no experience with propane carburetion. I do like the idea however. You know, may tractors (in the day) were available with propane. This was basically what they did.

[@leonhart2452]

I was watching a video of yours from 9 mo ago. You were talking about why old vehicles had positive ground. You said it was because of spark plugs. The spark jumped from center electrode to the ground strap and coils are wound so this happens.
You then said all coils are made this way. I don't believe it. The reason I don't is because a lot of engines use wasted spark coils. These coils don't ground the spark through the coil. When the coil sparks it travels down one plug wire to the plug, jumps from the center electrode to the tang on the plug. From there it doesn't go to ground, it crosses through the engine to the other plug, jumps from the tang to the center electrode, up the plug wire and back to the coil.
Many two and four cylinder motorcycles use such coils. Many four, six and eight cylinder engines use such coils. They use one coil pack for every two cylinders. Ford even specifies two different types of plugs, one for the positive polarity, the other for the negative polarity.

[@bryanh1944FBH]

Hi Leon. Very interesting that Ford specified two different plugs. This is the same a Delco having a different regulator for positive ground. Metals have to be different from where the spark jumps off and where it lands. I appreciate your comment. To me, this confirms how and why polarity is important in the spark plug. It would be most interesting in the Fords to see what happens if the plugs are installed just opposite. I bet they don't last long! Just like the tractor. Thank you for your comment! Its very interesting indeed.