www.iFourWinns.com

when i checked the out drive oil today it was under pressure .any thoughts on the cause

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1989 245 vista
5.7 cobra

It may have been much colder (air more dense) when you last had it open?
This frequently happens to my SX Drive...

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2011 Four Winns H180 SS.
Aussie built Mustang 2800.
SOLD - 1997 Four Winns Horizon RS

Check it for water, when that happens it can be sucking in water and that eventually pressurizes the gear lube. The drive starts out cool, then you run it the oil heats up and expands a bit and when it cools off if a seal leaks under vaccum it pulls in water. Happened to me a long time ago when I first had it.

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88 Four Winns 200 Horizon
4.3 OMC Cobra-4bbl
2002 Walker Bay 10/2012 Suzuki 2.5
2008 Walker Bay 8

1998 Jeep Grand Cherokee 4.0/Selectrac
2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II

Louc: there was a little milk to the first amount of lube then it was clean. did you have a bad seal on yours
deafwish: it was the end of april when i canged the lube

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1989 245 vista
5.7 cobra

Yep there were 2 seals that were replaced, one behind the water pump shaft and one for the bearing retainer.

_________________
88 Four Winns 200 Horizon
4.3 OMC Cobra-4bbl
2002 Walker Bay 10/2012 Suzuki 2.5
2008 Walker Bay 8

1998 Jeep Grand Cherokee 4.0/Selectrac
2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II

if there is a bad seal wouldnt the presure bleed off after sitting for a few days, I pulled the boat thursday and didnt check lube untll 7:00 yesterday

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1989 245 vista
5.7 cobra

It will reduce because of the temp going down, but there is no vent on an outdrive like an automotive differential, so the pressure will tend to remain.
When everything is OK, you can actually hear a bit of vaccum opening it up after using when it sat long enough to cool off.

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88 Four Winns 200 Horizon
4.3 OMC Cobra-4bbl
2002 Walker Bay 10/2012 Suzuki 2.5
2008 Walker Bay 8

1998 Jeep Grand Cherokee 4.0/Selectrac
2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II

it popped up from the positive pressure when i loosened the cap

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1989 245 vista
5.7 cobra

It probably sucked in just enough water to pressurize it. Can you rig something up to do a pressure and vaccum test?

_________________
88 Four Winns 200 Horizon
4.3 OMC Cobra-4bbl
2002 Walker Bay 10/2012 Suzuki 2.5
2008 Walker Bay 8

1998 Jeep Grand Cherokee 4.0/Selectrac
2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II

yes i have pressure and vacum gauges

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1989 245 vista
5.7 cobra