Chainsaw Repair

My ms-261 after a day of work leaks bar oil on the floor, bed of my pickup and where ever else I park it. It isn't leaking around the oil pump area behind the clutch, its comeing out of the area where the saw oils the bar and chain.  I appreciate any help given.

The hole in the bar is open the thin cover I removed, oil is every place but after cleaning every thing up didn't seam to be comeing from there. But when I picked the saw up off the bench the oil on the bench leaked from underneath where you adjust the bar oiler at. So I took the clutch out and that entire cavity is soaked in bar oil.  The hose is on the pump. The oil pump bolts were tight. The oil pump is adjusted as low as it can go , compareing this saw to my 362 I think it oils too much none of my other saws has oil on the bars as bad as this 261 has on it.

Seriously it's past the dribble stage, depending on how much oil is in the tank is how much it will leak out, I have numerous oil spots on the floor that is as big as the powerhead. Last nite I stored the saw bar side up   no oil leaks, half a tank of oil.

I've been in the boat myself

+1 on the check valve, especially if it is an older saw, or maybe a bit dirty.

Other options (I have done all of these):

1. Vent the bar oil tank after use, by opening up the filler cap to balance any pressure inside:

2. Place oil absorbent mats under the saws, in their cases, on the storage shelves, etc. These soak up way more oil than newspapers, paper towels, etc.
e.g. New Pig #403 Oil - Only Mat (or the equivalent) - about 50 cents each in quantity: http://www.newpig.com

3. If I have a 'leaker' saw, or one that I just do not plan to use for several days, I just drain the bar oil back into the jug.  No need to absorb it and throw it out.  I use those disposable, paper funnels that most gas stations give you for free, so there is no clean-up of the sticky bar oil from a plastic or metal funnel.

Philbert