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Discussion Starter #1
No doubt the passage from the oil tank is plugged.
I've put a lot of air pressure on the tank but can't get any oil to exit.

I am sure the oil is supposed to exit right near the chain or sprocket, but I have not been able to identify the exact spot for further attention.

If anybody has a pic of the exit point for the oil that would be a big help!

These saws are well known for plugged oiler lines, so any tips would be appreciated!
 

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Hey there! you should be able to see the oiling hole/slot when the bar is off. It's usually just above the bar mounting studs. there should be a co-insiding hole on the bar. you may want to check the bar hole itself, they can clog quickly. i would be careful pressurizing the tank, as they can blow apart.
 

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Discussion Starter #3
We figured it out.

It was the little plunger pump on top of the oil tank.

All of the lines and ports were clear. Unless you can find a used one, the sellers on ebay get $30 for a pump.

I also found that the suction hose in the oil tank was bad. It was brittle after 20 years, though soaked in oil!.

The way Mac designed these, to get to the oil suction line and strainer, and to install a new one: you have to remove, the bar, the starter, the bottom cover the top cover, the exhaust, and then get to the 4 bolts which secure the oil tank to the engine.

It's a beastly job, requiring a couple of hours including carefully re-seating the oil tank against the engine with gasket maker, all because of a terrible design by Mac.

Otherwise these are great saws!
 
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