(1) Where in the world is the lower unit lube bolt located? I see the top bolt easily.

(2) My water pressure went down this weekend from a wide open 25 -28 psi to wide open at 14-15 psi. I did fish shallow but did not notice any clogged lower unit pickups. Is it difficult to replace impeller?

I bought the boat and don't have a manual is why I ask.