Chainsaw Repair
Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Partner => Topic started by: wkend lumberjak on November 05, 2014, 10:00:58 pm
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this is a question for a friend of mine he is working on a p85? and the measurements he is coning up with are 52mm bore and 37mm stroke that does not add up to 85 cc looked at Acres. It says 36 that doesn't =85 either. Any input would be appreciated. The math I'm using is pi x radius squared x stroke divided by1000. ??? ??? ???
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Hey Kenneth! I actually have two of these saws here, I wonder if they are maybe not even P85s? It still does not explain the Acres listing of 85cc with 52/36 bore/stroke.
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Displacement should be more like 76ccs
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Look what I found:
http://chainsawrepair.createaforum.com/partner/partner-55cc-65cc-70cc-85cc-100cc/
Guess I better check the stroke again.
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If it has a 40mm stroke, that would make it 84.905cc.
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There are several bore/stroke mistakes in the Partner section of Acres site, as well as several misleading pictures.
The correct stroke is 40mm. ;)
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Alan any luck.
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Well I chucked the crankshaft up in the lathe, and used the cross-slide readout to measure. It does have close to a 40mm stroke, as in 39.875 after transposing from English to metric measurements.
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hmmmm,
sounds like the stroke is a little short.
don't worry ive been accused of that myself, nothing to worry about just the way it is......
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The P85 runs again! Here is video of it after a basic porting job and squish adjustment.
https://www.youtube.com/watch?v=e3_kPjBetK0&feature=youtube_gdata_player
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Looking good. :) :) :) :)
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Finished the fourth draft on porting the P85 last night. I kinda like this old saw!
https://www.youtube.com/watch?v=H5X9-iiL-Xk&feature=youtube_gdata_player
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Nice saw - now it it time to start looking for a 99cc P100 top end! ;D
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Yes, 54mm here we come! I'd rather just find a whole P100 and keep this one as it is. Here is the latest video of the P85 in old Walnut, wearing a 9 pin and pulling some square chain.
https://www.youtube.com/watch?v=pDsjcYmrE8s&feature=youtube_gdata_player
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Very Nice Partner Awol.
Speaking of putting a different top end on something, did you guys see the Dolmar 9010 that SRCARR put a 395BB on? I was impressed.
http://sawhawgz.com/showthread.php/3919-Dolmar-9000-9010-Big-Bore-AKA-the-Dolkivarna?s=89808cf9ea589ad7387ddae220e31785
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Yessir, I did see that thread and was also impressed. There is a lot of that kind of stuff that can be done if you take the time to try it. This P85 is fitted with a 064 Stihl piston, because the skirt was .100 wider and allowed more widening of the intake and exhaust ports.
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Yep sure did all I can say is "WOW" awesome work.
Shep
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The saw seems to really get with the program. Nice work.
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Great job salvaging that saw AWOL.
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Nice work awol.
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Thank you-all for the kind words! It sure is fun to take a basket case like this one and make it RUN.
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Thank you-all for the kind words! It sure is fun to take a basket case like this one and make it RUN.
What all have you built and ported for fun or work?
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I haven't been doing this for very long, the p-85 is only about my fifth project. First was a John Deere 50v, then my Echo cs600, John Deere cs81, Echo cs590, and Jonsered 801. Sure is fun learning new things!