ke many, I have struggled with the flaky Tecumseh carb on my Toro lawn mower. My main problem now is that it won't prime after a bulb replacement (running fine before the replacement.) So I asked myself, is it possible to do away with the primer and add a choke? I examined a Tecumseh snowblower carb that has a choke ... see below. Some mod would be required but the snowblower carb sure resembles the lawn mower version in many ways. As far as mods, a couple things stick out: 1) the fuel nipple is pointing the wrong way. Maybe it could be turned or the hose could be curved to reach it, 2) there is no red straw sticking out the back .. how crucial is that odd lookng piece? Briggs & Honda don't have them, and 3) there is no outlet for a hose to return "whatever" to the engine ... not sure what is the purpose of that arrangement. What do you guys think?