Re: Big Twin Lower Unit Reseal Question

[Casey Lynn]

If you are using alot of vacuum on a single lip seal with the seal properly oriented to keep the oil in……then you may have exactly what you are describing.
When using vacuum remember it is in inches, not pounds. Pretty powerful stuff. Would prob. use no more than a few inches of vacuum for that test.
You can do a visual vacuum test on the bench by using soapy water and watch the water bubbles get sucked into the seal in question.