Oil cap design lends itself to cross-threading the cap. be careful. The engine cranked with the first pull. wonderful. Engine idle was rough - it constantly oscillated the speed. I found it was necessary to micro-adjust the choke to get a smooth idle. The range of movement for the choke was about the width of a cat whisker. I'm not kidding. A tiny movement to the left and it sputtered. A tiny movement right and it oscillated the speed. The good news is that it works ok at the 'proper' setting. Frustrating, but overall I'm pleased. For the money, you can't beat it.