Wolverine
dilligaf
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- 373
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- Jan 1, 2016
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Back story... bought my tree five seven new 2010. Cut 7-10 cord per season and ever since new I always felt the oiler was stingy. With it turned up to the max and the bar oil holes slightly enlarged I always used about 1/2 tank of oil per tank of gas. Well after a little research and some help, I decided to try a mod.
With the oil pump removed, push up on the adjustment screw and remove the pin.
![roll pin.jpg roll pin.jpg](https://opeforum.com/data/attachments/4/4720-75d39ad21d8b78a480b2c8725f830d4c.jpg)
This will allow you to remove the piston. Here's a pic of the pump apart.
![DSC00713.JPG DSC00713.JPG](https://opeforum.com/data/attachments/4/4717-a810980a459af12e8a134f20c5f27e3a.jpg)
The angled end on this piston creates stroke as it is turned by the worm gear.
![DSC00715.JPG DSC00715.JPG](https://opeforum.com/data/attachments/4/4716-5247eab5c29c9d3288a4b19f3d75fc4b.jpg)
Idea here is to show the starting angle, then increase it a bit to create more stroke. I did that with some emory and a flat surface.
![DSC00718.JPG DSC00718.JPG](https://opeforum.com/data/attachments/4/4715-b823f17f6c3a52ed22b152af7b7f3397.jpg)
With the oil pump removed, push up on the adjustment screw and remove the pin.
![oil pump.jpg oil pump.jpg](https://opeforum.com/data/attachments/7/7731-7410dfae8bf546b645e28cd6560814b0.jpg)
![roll pin.jpg roll pin.jpg](https://opeforum.com/data/attachments/4/4720-75d39ad21d8b78a480b2c8725f830d4c.jpg)
This will allow you to remove the piston. Here's a pic of the pump apart.
![DSC00713.JPG DSC00713.JPG](https://opeforum.com/data/attachments/4/4717-a810980a459af12e8a134f20c5f27e3a.jpg)
The angled end on this piston creates stroke as it is turned by the worm gear.
![DSC00715.JPG DSC00715.JPG](https://opeforum.com/data/attachments/4/4716-5247eab5c29c9d3288a4b19f3d75fc4b.jpg)
Idea here is to show the starting angle, then increase it a bit to create more stroke. I did that with some emory and a flat surface.
![DSC00718.JPG DSC00718.JPG](https://opeforum.com/data/attachments/4/4715-b823f17f6c3a52ed22b152af7b7f3397.jpg)
Last edited: