The F6-161 Hurricane was an F-head version of the L6-161 Lightning flathead straight six. It was used in Jeepsters and Wagons.
BF-161 The BF-161 had a 3 inch bore and a 3 inch stroke, a one-barrel carburetor and an output of 90 hp (67 kW; 91 PS) at 4400 rpm and 135 lb·ft (183 N·m) of torque at 2000 rpm. It had a displacement of 161.1 cubic inches (2,639 cc). It had a compression ratio of 7.6:1.
2600 The 2600 was essentially the same as the BF-161, but it had two-barrel carburetor and had an output of 130 hp (97 kW; 132 PS) at 4400 rpm and 140 lb·ft (190 N·m) of torque at 2000 rpm. The compression ratio remained 7.6:1.
3000 The 3-litre (184 cid) had its stroke increased to 4 inches, and had a displacement of 3,016 cc (184.1 cid). It had a 2-barrel carburetor and an output of 140 hp (104 kW; 142 PS) at 4400 rpm and 161 lb·ft (218 N·m) of torque at 2000 rpm. It also had a slightly higher compression ratio of 8:1.
Read more about this topic: Willys Hurricane Engine