When using the single-vacuum distributor, the vacuum hose runs from the vacuum port on the left side of the carburetor to the vacuum canister on the distributor. In that case, the vacuum port on the rear of the carburetor must be plugged.
For most cool season grasses and for folks living in northern climates, the best time to plant grass is in late August, early September. Depending on exactly the climate you have and the type of grass seed you're planting.
Although the best time to seed cool season grasses is late summer or fall, the next best time is early spring. Keep the per acre seeding rate to at least twenty-five pounds of Southern States Horse Pasture Mix. You can drill directly at a shallow depth; or broadcast and drag or harrow to provide some seed coverage.