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.
Because of this, you may have to plant both warm and cool weather grasses. If you opt for this consider planting cool weather grass seed in the early fall and then in the early spring overseed your lawn with warm weather grasses. Wait until temperatures get above 65Â°F during the day and then seed. 2  This will allow the warm weather grasses to get the benefit of warm temperatures that come with summer while giving them time to become established prior to cooler weather in the fall. 3  Plant in regards to the grass seed and not the area you live in.