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Summer weight oil is a base 30w and winter is a base 20w.
Running summer weight oil in the winter puts extra stress on the oil drive gear and will wear it out prematurely.
The oiler drive gear is the one I mentioned in my above post. The wire clip is connected to the oiler drive gear and the other end is engaged in the backside of the drum. The oiler only turns when the clutch is engaged and the drive sprocket is turning. Not all saws are this way but you is. The oiler drive gear is the designed weak link in the system. If it breaks, wears out, etc it is less than $10.00. No damage to the pump itself or the cutting attachment (bar and chain)
There is a screen in your oil tank that you should probably check. It is a black plastic piece about the size of a 9mm bullet. It is stuck on the end of the hose. It comes off with needle nose pliers.
The clutch comes off to the right. DO NOT USE AN IMPACT WRENCH! You can shear the flywheel key if you do.
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