Well, three, and they're missing. The 2775 has been heating up the clutch cover, and I was assuming it was because I was running it had and it was accumulating gunk under there - but I wasn't comfortable with that explanation. Then today it started running rough, and it's always been a smooth saw. So after poking around I finally noticed there's only one bolt holding the engine in the housing! Doooh! Now I get it.
So I've been looking at the IPL, and where on the Wild Thing family there is a set of bolts that both holds the engine in and attaches the cylinder to the bottom end, on these it shows two sets of screws with different numbers. Is that right? Are there separate screws to hold the engine together and another set to hold it in? I will try to look at it more closely to see.