T&T: 10 top Lehman Oil Leaks

[Thomas Averill]

This is going to sound lame, but I am having a heck of a time finding an oil
leak on my 120 Lehman/34Chb.  As you know, the bilge container slopes to the
bow and that is where the oil collects in the box under the motor.  I have
lined the box with paper towels, abosorbtion mats etc. and cannot find the
drip line.  It seems to only leak when run for several hours, not one or two.
I thought the front main seal may be the culprit, but have ruled that out.
Also, I do not believe it is the valve cover or any of the cooling lines. It
will drop a quart in 20 hours, so it is worth the concern.  Any tips you have
to find the culprit would be appreciated.  How about an oil dye or something
to make the source more identifiable?  Thanks  Tom