Chainsaw Repair
Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Husqvarna => Topic started by: middleagedmutant on April 02, 2014, 09:39:03 pm
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I have a 365XT that's been ported and MM and squish cut with a black unlimited coil also removed stops on carb screws so it can be tuned with screwdriver are splined carb tool. I am running 32-1 oil mix question is I have a tech tach and have idle at 2700rpm but it fluctuates a couple of hundred RPM is that normal and when setting max RPM should it hold steady at about 13400RPM are fluctuate a couple hundred RPM I believe I have a decent tune because it idles good and chain does not run and spools up without bogging you can roll the saw and it does not die are bog would you guys call it good? What should max RPM be set at can anybody in the Ohio give a guy a hand with tuning it some pointers wife makes gourmet cookies and I can supply beer or some money for the teaching of the dark arts of tuning. I think I have it but what a seasoned ear to verify if I am doing it right I have the tools just need a little help and thanks.
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Did not the person who made the modifications put a basic tune on the saw?
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I have put a tach on some of my saws and a little bouncing around of the RPM is nothing to be concerned about.
The best way to tune is by ear with a non limiting coil. Does the saw 4 stroke at WOP and then clean up when put in wood.
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When I first got it, it had a issue with the chain running at idle tried to adjust it out but no luck so I had to pull oil pump and sand of the lip and readjust the carb I put the unlimited coil on it before I sanded the lip because I read somewhere it would help with idle chain running problem but it did not work but sanding the lip did. I was wondering what the max RPM should be set at I mean I could mail it to the guy that did the work but I want to learn to do it myself.
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I am going to have to put it in some wood this weekend if it don't rain
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Have a read of the link below from Madsen's it will give a good basis to learn from. It is much better to have some basic understanding of how to tune a pro saw before attempting your first attempt at tuning.
http://madsens1.com/saw_carb_tune.htm (http://madsens1.com/saw_carb_tune.htm)
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Also being the saw is modified tuning it to factory RPM's is really no longer valid. You need to learn what tuning by ear is all about. Your saw is muffler modded and that makes it easier to hear. Lots of people have learned by listening to videos on forums just like this one.
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I down loaded Masdens tuning and that was what I used to tune with I can hear a saw 4 stroke on video but not as well when actually doing it if that even make sense. Want to get it sorted out before May shutdown when I will be doing twelve hour days 7 days a week for the whole month of may than going Back to school to get boiler license. If I can manage to make a video and uploaded while I am tuning it do you guys think you could help me further thanks .
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A video would help us a lot
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A video would help us a lot
+1, If you make a video make sure it is at WOT and hold the saw out of wood then in the wood and repeat that process several times so we can hear it.
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+ 1
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You can "read" the spark plug too. Make some good long cuts with it tuned where you think is good. Then pull the plug once it's cool enough. Brownish in color is good, gray or white and it's lean! The Madsen's link is a good place to learn what to listen for.
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I'll help you when I get time. But right now I am buried.
I wouldnt tune for max rpm myself for firewood cutting. Only for cookie cutting timed cut.
Firewood or real work, set 4 stroking and where it cleans up in wood.
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I'll help you when I get time. But right now I am buried.
I wouldnt tune for max rpm myself for firewood cutting. Only for cookie cutting timed cut.
Firewood or real work, set 4 stroking and where it cleans up in wood.
+1 C4F, doing work is different than making cookies!
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Thanks Cutforfun_ I hear you about being buried I am doing the twelves and weekend thing and getting ready to go back to school in June to get my boiler license I'm doing a kind of double duty and working over to get my 1000 hours in the steam plant for the State. Really not looking forward to May because its mandatory 12 hour days 7days a week for the whole month. Thanks for the responses
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With it being a modded strato charged motor, you will need to learn to read plug color also.
I can't set my 372 XT to four stroke at wot and then have it clear in the cut.
I tach it at 12,500 wot and the plug color is a nice brown/tan.
But mine is a stock saw and your modded one may be different.