How do I identify the engine on this thing, to find a size or part number for a bolt I'm missing that holds the carb on the the engine? Sadly, it fell out, and my son just jammed a too long bolt in there that we had lying around. Not good. I know it's a B&S 4HP, but I can't find a model number on this engine.
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This old 1998 MTD Yardman 22" has seen better days, but starts every time and mows well, I want to keep it functioning. I may even clean/paint it one day :)
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Odd Bolt:
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This old 1998 MTD Yardman 22" has seen better days, but starts every time and mows well, I want to keep it functioning. I may even clean/paint it one day :)

Odd Bolt:
