Chainsaw Repair
Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Solo => Topic started by: Riddler1100 on March 19, 2015, 07:54:52 pm
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Hi I'm trying to find a solo 680 piston, may possibly need cylinder head also haven't pulled it apart yet. I'm located in Australia
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Ideas
I've put 064 pistons in Solo 680's and just recently was toying with a BB044 piston and one other that I can't remember in a stroked 680...
Adam is the guy into the solo
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Yup. A Stihl 064 piston fits with a little work to clear the rod end.
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What kind of modifying is required?? To use the 064 piston
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What kind of modifying is required?? To use the 064 piston
Use a flat file and relieve the inside of the piston bosses where the rod goes in. The rod on the 680 is wider then the Stihl. Pretty easy, takes about 15 minutes. Its hard to explain but once you see it its is pretty obvious.
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I have to open wrist pin bosses to run the stihl 066 pistons in my poulan 505 for same reason. or if you use the 064 in the 475.
It is easy to do. If I can do it anyone can.
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Yup. A Stihl 064 piston fits with a little work to clear the rod end.
Thanks for info I've got a pretty nice 680 I bought for the coil has scored piston. Didn't need the coil after all the plug boot had come off the wire just far enough no spark. Bought it to fix my very low hr. 603.
Shep
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Thanks guys, I'm assuming the piston bosses are fairly easy to just file... Is there a certain "clearance" the pin bosses should be from the crank rod end?? Or does it have to be reasonably tight fit??
Thanks again guys
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A small gap on each side to accommodate any misalignment of the cylinder as well as allowing fuel/oil mix to the wrist pin bearing would be ideal.
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Anyone got solo 680 piston specs.
There is a guy talking to OP and me saying he used a 272 piston in a 680.
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Anyone got solo 680 piston specs.
There is a guy talking to OP and me saying he used a 272 piston in a 680.
I believe I tried one and it was too short. The exhaust would free port. Bore size is the same but skirt was too short if I remember right.
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Husqvarna 272, 272K
Replaces Part Number 503 60 98 03
Bore 52mm
Height 40.5mm
Head Type Flat
Piston Pin 12mm x 33mm x 8mm
Ring 52mm x 1.5mm (Caber F-Cast GH.F)
Compression/Pin Top to top of Piston 18mm
Compression/Pin Center to top of Piston 24mm
Stihl 064, MS 640
Replaces Part Number 1122 030 2001
Bore 51.96mm
Height 43mm
Head Type Flat
Piston Pin 12mm x 33mm x 8mm
Rings 52mm x 1.5mm (Caber F-Cast GH.F)
Compression/Pin Top to top of Piston 17mm
Compression/Pin Center to top of Piston 23mm
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Thanks. His pics were showing the 272 skirts being short but I was wondering. I would guess it is a solo 680 piston on right? I never seen one to know.
(https://fbcdn-sphotos-e-a.akamaihd.net/hphotos-ak-xfp1/v/t1.0-9/10313352_10206429754605579_7008349409809794848_n.jpg?oh=e6db1a66d31b77c53ad559b41dad4fdc&oe=55714CE5&__gda__=1433706880_070584923907bacf8b474fb3dc8c5746)
(https://scontent-ord.xx.fbcdn.net/hphotos-xap1/v/t1.0-9/10577189_10206429756525627_9163385800849631852_n.jpg?oh=5946cefe998abe615b5d143fd44a4907&oe=55792626)
(https://fbcdn-sphotos-b-a.akamaihd.net/hphotos-ak-xpf1/v/t1.0-9/10259842_10206429762765783_333489199621471801_n.jpg?oh=52c30d1eac768bd6c6946281c0c777d1&oe=55AEA5E7&__gda__=1434123736_7367ec78fc9fd651c5837a69bc50fb62)
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Yes that's a 680 piston.
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So the 272 will not work due to the shorter skirt is that correct?? And am I reading this right that a Stihl 046 piston will work only thing is the pin bosses need to be filled back to accomodate top of crank??
Thanks guys
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So the 272 will not work due to the shorter skirt is that correct?? And am I reading this right that a Stihl 046 piston will work only thing is the pin bosses need to be filled back to accomodate top of crank??
Thanks guys
064
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Also does it matter if the replacement piston I choose has 2 x piston rings or only 1?? Obviously solo has 2 rings but would there be any problems using a piston that only has 1, as I would assume solo engineers gave the piston 2 rings for a reason....
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Not to me. I have used 1 in 2 and 2 in ones that came with 1.
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@adam32 what do you think of the BB372 piston being used in a stock 680? I used a BB372 in a 475 because it was drop in. Now if hot ported or race I would want the better OEM 064 or meteor piston.
The 475 is windowed and I used the non-windowed bb372 and she runs great stock.
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Yeah I'm leaning towards using the BB372, but am now worried a bit by the skirt difference in length. Would this create any dramas??
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Yeah I'm leaning towards using the BB372, but am now worried a bit by the skirt difference in length. Would this create any dramas??
What skirt differences?
Maybe you thinking confusing the 272 with the short skirt?
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BB372 on TOP, 680 bottom
(https://scontent-ord.xx.fbcdn.net/hphotos-xfp1/v/t1.0-9/10451177_10206437243072786_6255210878785523846_n.jpg?oh=40190b5797a837ae145fc7dc75a58c2e&oe=557668F6)
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Looks like a better match?
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Give the BB372 a try. Looks like the skirt is a touch wider then an 064 too.
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Awesome I'll order one in and see how it goes... Might have to file pin bosses as others have suggested, but yes it looks like the most identical piston to the original Solo 680..
Do you think the bb372 cylinder would be the same fit into a solo 680 crankcase, as once I pull it apart my cylinder may be scored, and require honing or replacement...
Thanks guys
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Awesome I'll order one in and see how it goes... Might have to file pin bosses as others have suggested, but yes it looks like the most identical piston to the original Solo 680..
Do you think the bb372 cylinder would be the same fit into a solo 680 crankcase, as once I pull it apart my cylinder may be scored, and require honing or replacement...
Thanks guys
Best how to on cleaning cylinders. I'm still doing it by hand but want to set up to do this way someday. http://chainsawrepair.createaforum.com/stickys-of-how-to-basics/how-to-remove-aluminum-transfer-without-acid/
I'm betting pin bosses on BB372 wont need to be touched. If so very little. Mine didnt need touched for the 475. But 064 would have too.
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@adam32 how wide is the rod where it goes into piston on 680?
I have a crank I can check on a 425 505 out I can check and betting mine are just like 371 crank, except 425 etc are course thread instead of fine.
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@adam32 how wide is the rod where it goes into piston on 680?
I have a crank I can check on a 425 505 out I can check and betting mine are just like 371 crank, except 425 etc are course thread instead of fine.
I'll check when I get home from work. I'm pretty sure the 680, 690 and 603 are the same size.
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Mines apart... About .624
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Mines apart... About .624
Cool I will run out and measure.
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Mines apart... About .624
Cool I will run out and measure.
680 above.
I was quick at it so not being precise and batt was almost gone. but thinking I was seeing.
.5905 for the 505 poulan crank
.591 for a 372 husky crank
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Is this the same one
HL Supply deal of the day ends today
Price won't last long!!!!
Makita, Dolmar DSC PC 7900, 7901piston kit 52mm
$ 12 99
Buy
Deal expires midnight on 03/23/2015 (EST)
$ 29 99
REGULAR PRICE
57%
SAVINGS
Quality aftermarket kit. 52mm.
For Makita, Dolmar DSC, PC, 7900, 7901 chainsaws
Includes: piston, rings, wrist pin, cir clips
Replaces OEM part: 038 132 000
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Is this the same one
HL Supply deal of the day ends today
Price won't last long!!!!
Makita, Dolmar DSC PC 7900, 7901piston kit 52mm
$ 12 99
Buy
Deal expires midnight on 03/23/2015 (EST)
$ 29 99
REGULAR PRICE
57%
SAVINGS
Quality aftermarket kit. 52mm.
For Makita, Dolmar DSC, PC, 7900, 7901 chainsaws
Includes: piston, rings, wrist pin, cir clips
Replaces OEM part: 038 132 000
Are you saying aftermarket dolmar 7900 onsale and maybe try it in this case too?
I forget the specs on 7900 but thinking they were short piston and narrow skirts. I will see if I can dig up oem specs.
Heck in that case the windowed poulan 475 jonsered 2077 52mm oem piston would work. But finding them is alittle tough oem ( have had them myself).
The afm versions of 475 2077 if like the afm 505 ones will be way off in specs.
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other 52mm
475 2077 oem piston
52mm
top of pin hole to crown 16.75mm
height 42.65mm
pin 12mm
BB372
Bore 52mm
Height 42.5mm
Piston Pin 12mm x 8mm x 36mm
Pin to top of Piston 16.75mm
Stihl 064, MS 640 Meteor
Height 43mm
Pin 12mm x 33mm x 8mm
Pin hole top to top of Piston 17mm
Stihl 046, MS 460
Bore 52mm
Height 39.25mm
Compression/Pin Top to top of Piston 15.5mm
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piston on left is oem dolmar 7900, middle EHP Wiseco, right 272
piston on left is a 7900 used piston, with ring it weighs 85.4 grams , skirt width of 32mm/ 1.260 inch
middle is the wide skirt wiseco piston, with ring it weighs 79.7 grams and has a skirt width of 1.670 /42,5mm
right piston is a stock 272 piston weight was 82.9 grams with ring , skirt width is 35.83mm/1.414 inch,
so race piston is wider and lighter and will fit the 7900/272/460 stihl , I built this piston maining for a race piston and to be run on alcohol/nitro, as you can see its coated everywhere
(http://chainsawrepair.createaforum.com/index.php?action=dlattach;topic=273.0;attach=12537;image)
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Cant come across 52mm 7900 specs besides those posted above for now.
Did find 54mm which is no good here, but maybe the afm specs might be close.
Height 40mm
Piston Pin 12mm x 7mm x 32mm
Circlips 12mm
Compression/Pin to top of Piston 13.25mm
Compression/Pin Center to top of Piston 19.25mm
Going to say dolmar 7900 to short for stock drop in for 680. Just looking at the specs.
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As always members here get first crack for awhile of what I find and see. ;) Solo 680 full wrap $300 http://chainsawrepair.createaforum.com/trades-swap-section/solo-680-full-wrap/msg77285/#msg77285