alx340

i put the boat in sunday at sherman cove. checked the oil before we left. It was a quart low.. added a quart and took off. Went slow and before i could get to the channel the oil pressure dropped to zero and all the oil leaked out(all of it)into the beilge area. rear main seal is all I can think?

whipper snapper

sound more like a hole in your oil pan to me. all the oil will not dump out of your engine in 15 minutes fromyour main seals leaking. maybe if your main seals were totally gone. on my old i/o the pan rotted on me, causing the engine to FAIL!

sosmarine

Probably the oil pan around the drain plug.

Sent PM

Tuna Man

Same here on the oil pan. I have NEVER in all the engines I've worked on seen a seal that would leak that much oil in that short period of time, then I haven't seen everything either. Nothing would surprise me, but think it's the pan. I'd drain the bildge, clean up what I could and with the engine static pour a gallon of diesel in the engine (as you would oil), slowly so if you see it leak you can stop. "Q" how do you know ALL the oil leaked out, you do something you didn't tell?

SonShine Fishing

Check the oil cooler or remote oil filter and lines. Sounds like an oil pressure leak.

Breeze Fabricators

Must be a merc cruiser. See the oil pan rust thru all the time. The very bottom gets emersed all the time. The oil pan for a four wheel drive vehicle is the same as a marine oil pan. They both have baffles to keep the oil from sloppin':mmmbeer around in ruff terrane or seas. Epoxy coat the new one and that'll end the problem!

__________________
Tim Scallan
Breeze Fabricators Inc.
2932 Westfield Road
Gulf Breeze Fl.
32563
850 554 6172/934 8609
BreezeFabricators.com

DOUBLE "D" & LV

if not the oil pan or that area, possibly the oil sender or switch has a hole in it and the pressurized oil was forced out quickly.

Tuna Man

4.3 (V-6) If I'm not mistaken is the same design as a V-8, and the oil pressure switch is on the block behind the intake manifold (by the distributor). In this position it would put it about a foot or so forward of the transom, and a leak of that magnitude would of surely covered the top of the engine or cowling.

sosmarine

Depends on the year. If it has an electric fuel pump there is are actually three oil switches/senders. The oil sender, which is theone that rusts out,in this case is usually down by the oil filter. I have replaced several over the years for this problem.

Tuna Man

[quote]sosmarine (11/15/2007):doh..nice to know