I have a very old riding mower. It had a very difficult time getting started this Spring. Lots of White smoke and sputtering and very loud. There was gas left in the gas tank and it is not real good gas - OHio gas. I put new gas in, tuned it up and it did finally start. But it really isn't running great. Here is what is happening: 1 - 60% of the time, when I shut down the mower after mowing, about 4 minutes later it makes a loud pop - sort of like a backfire. Just once. 2 - The mower sputters and seems like it is going to stall out when: a. I turn the wheel in an extreme way, b. I turn the mower blades on, and/or c. going up the hilly portion of my yard, Not always - but often enough. Wasn't sure I would make it through the mow today. So, any idea what is going on here? I want to just thank the people who answer questions here on this site. You have all saved me numerous times!

bought a used motor for my big huskee made by MTD. It’s a 24hp Briggs intek v twin. It started fine the day I bought it. I’ve been 2 months installing it and modify pullies, etc. I cleaned the carburetor and installed new plugs, air filter, oil change. It starts and runs fine until you engage the blades and then it won’t now except on level ground. I’m hoping the governor is not messed up. Any thoughts?