I recently purchased a 390 Trojan Express (made by Carver, I believe) at auction. I am unsure if it was properly winterized. I'm expecting some bugs that need to be worked out once I get her wet, but I'm trying to do as much preventative maintenance, and address as many issues as possible before I splash her.

Upon inspecting the Walter V Drive gearboxes, I noticed that the gear oil was slightly milky. It wasn't a total milkshake, it just had some strands of milky residue on the dipstick. What are the chances that the gearboxes were not properly winterized, and the oil cooler freeze cracked? (the inlet was in the open position, and the hoses are still attached, and fine, with no water or antifreeze in them) We had a rough winter and spring in MI, and it's not uncommon for a small amount of milk to form from condensation.

If a busted oil cooler is a likely issue, how difficult will it be to pull the top plate off, and inspect the same? Does anyone have any pics or advice? The water inlet for the coolant lines was in the open position, no water in the lines, and the lines are in good shape. The motors were properly winterized, and are not freeze cracked, as was the generator. Is SAE 30 the proper lube for the gear boxes? Any recommended brands, or is any quality oil acceptable?

Do these gearboxes have a water pump that draws water, or do they rely on the propulsion of the boat to draw water from the lake? I didn't see any pump on the lines.