You can remove the choke from the carb, it isn't really necessary. If you do decide to choke, simply put your finger over the exhaust and hand crank through the compression stroke. Just once, and make sure the glow driver isn't connected.

I would offer the suggestion that you tune and break in the engine without a cowl. After about 1/2 gal through the engine, you can then make it perty. Not having the cowl in the way makes adjusting the carb and linkage a lot eaiser. Expecailly the idle mix jet.

Make sure you use the fuel recomended, IE 15% nitro and 18% oil with a mix of castor. Omega works very well. Just get the straight fuel, not heli or 4 stroke. O.S. F plug is a must. I tried the fox and another "4 stroke" plug but ended up going to the O.S. F plug.

When you are ready to fire it up, check in first for tuning tips. That carb is different than any of the other four strokes I have, both Magnum and O.S. in that the idle jet doesn't screw in to a stop, but out to one. The manual gives the inital settings and break in instructions. Follow them closely and you will love the engine. It is a good choice, dependable and great running.

Don