Chainsaw Repair
Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Husqvarna => Topic started by: alsled on November 21, 2013, 07:43:55 pm
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Got a 394, used but new to me, I fired it up and its pumping oil rather quickly. I turned the screw all the way in and it still pumps to much. Any help would be great, as far as whats going on here.
Thanks.
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Al, I (clockwise) is more anti clockwise is less.
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You sure, I turned it out and it pumped more. This thing is F'ing with my head, lol
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Adjustment of the oil pump
The oil pump is adjustable. Adjustments are made by
turning the screw using a screwdriver or combination
spanner. The machine is supplied from the factory with
the screw set to position 2. Turning the screw clockwise
will reduce the oil flow and turning the screw anticlockwise
will increase the oil flow
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I was in error your last post is correct! Do you have a bar on the saw?
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Yup, bar is on it. I yank the pimp apart and have a look see tonight. Just wondering if there were any parts that wear out and cause the problem. The saw feels like a beast Tim. I put a new piston and rings on it with the jug with the broken top fin. There was some scoring on that jug. I cleaned it up as good as I can. It's at 130 psi, with no base gasket.
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Well it could be that the oil pump is a high volume designed for looking bars. Could also be that it is a crank driven pump, I will check my manuals.
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All versions use a clutch driven pump. No oiling at idle. See photo at bottom.
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A little bit of grinding here and there and it pumps less now.
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Al, I may have another 394/395 oil pump around here in case you need to get the oil volume up. Especially if you need to run 30 inch or greater bar.
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Yup, bar is on it. I yank the pimp apart and have a look see tonight. Just wondering if there were any parts that wear out and cause the problem. The saw feels like a beast Tim. I put a new piston and rings on it with the jug with the broken top fin. There was some scoring on that jug. I cleaned it up as good as I can. It's at 130 psi, with no base gasket.
The compression will go up some when the rings seat. What piston and rings did you use?
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Tim its at 155 psi, I had the stupid de compression valve pushed in. meteor piston and rings.
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Learn something new every day. Compression will still go up from 155 after rings seat. You must have cleaned the cylinder up pretty well. Was the score below the exhaust port? If so that will not impact the saws performance.
The top cover for the 394 and the other bits will be at your place Monday.
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Mostly below, but slight scuffing above.
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Well great! You should be able to go play in your buddy's wood pile in short order. 394XPs are truly a beast, with no base gasket and a muffler mod (did you dual port the muff?) she will really sing! ;)
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Yup added another exhaust port on muffler.