Yamaha Outboard - F9.9LMHB. Yamaha F9.9LMHB Outboard Motor. 20-Inch Shaft Tiller Handle Manual Start Manual Tilt Gray. The Yamaha F9.9LMHB Outboard Motor delivers portable power and smooth 4-stroke performance for boaters who need extra shaft length without added complexity. With a 20-inch long shaft, this model is ideal for sailboats, deeper transom skiffs, and utility boats requiring more clearance below the waterline. Reliable, quiet, and fuel-efficient, the F9.9LMHB is a workhorse in Yamaha'