I got an old Sears Roper, filter cover is white and busted up, cheap made, the clutch cover is also cheap made. Compression, that's a different story, will pull your arm out of place. I went to start mine with the decompression on and it snatched the handle out of my hand and took out the filter cover. Oiling system is over complicated, three copper lines to the oil tank, oil knob is like a pressure type valve to dump more oil to the bar. I'll take a Poulan over it any day.
Steve
View attachment 527815 The front is 83 and the rear is 78.
Thankyou!Have a look in this repair manual. Pg 11 & 12. I have the manual on a cloud storage site. The 5400 came with both 5/16" and 3/8" bar studs so make sure you get the right ones.
https://app.box.com/s/h96hz5joaqxadisu99es
That's a fine example
That 4000 looks spectacular! Where did you find it? It looks like it sat on a shelf in somebody's garage for the majority of its life.
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