Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Tool Talk Discussion Forum

piston swapping in chainsaw

Welcome Guest, Log in or Register
Author 
Rob

01-29-2004 16:09:56




Report to Moderator

I am wondering, If one were to find a Jonsereds 670 with a 50mm bore and 34mm stroke, and a cylinder and piston that is made for a different saw with the same bore and stroke, would it be possible to swap the piston only, not the whole cylinder assembly just the piston. Is it possible to do this? My reason for asking is that the stihl 038 piston is a 50 mm bore 34mm stroke dual ring piston and the jonsered 670 piston is also a 50 mm bore and 34mm stroke, but has only one piston ring by design. The design of both pistons is practically identical except for the fact that the stihl piston has 2 rings instead of one.

[Log in to Reply]   [No Email]
HJP

02-02-2004 16:52:37




Report to Moderator
 Re: piston swapping in chainsaw in reply to Rob, 01-29-2004 16:09:56  
The ONLY reason I did this was due to the fact I had a $20 parts saw advailable vs. $130 top end.



[Log in to Reply]  [No Email]
jokers

01-30-2004 19:20:01




Report to Moderator
 Re: piston swapping in chainsaw in reply to Rob, 01-29-2004 16:09:56  
Hi Rob, What exactly are you hoping to accomplish by installing the two ring piston in your 670?

Russ



[Log in to Reply]  [No Email]
Rob

01-31-2004 13:33:51




Report to Moderator
 Re: Re: piston swapping in chainsaw in reply to jokers, 01-30-2004 19:20:01  
What I am hoping to accomplish is higher cylinder pressure resulting in more HP and torque. plus with 2 rings instead of 1 I hope to have a longer lasting engine, better fuel economy, better cooling capability and save money by using less gas.



[Log in to Reply]  [No Email]
jokers

01-31-2004 22:07:57




Report to Moderator
 Re: Re: Re: piston swapping in chainsaw in reply to Rob, 01-31-2004 13:33:51  
You`re puttin` us on right? In another saw related post you took the position of the expert in giving advice, and then you expect me to take your reply to me at face value as serious? If your re-engineering of the 670 is going to produce all of those wonderful results, don`t you think that Jonsered would have incorporated them from the beginning?

BTW,who ever says "one ring equals farm saw, two equals pro saw" missed the whole picture by a country mile.

Russ

[Log in to Reply]  [No Email]
Mike in WI

02-01-2004 10:27:32




Report to Moderator
 Re: Re: Re: Re: piston swapping in chainsaw in reply to jokers, 01-31-2004 22:07:57  
LOL, Jokers - Where do these ideas come from? Pass the info along to DozerDan that it is a waste of time to perform mods on the single ring Dolmars as "a single ring = farm saw".



[Log in to Reply]  [No Email]
HJP

01-29-2004 21:05:36




Report to Moderator
 Re: piston swapping in chainsaw in reply to Rob, 01-29-2004 16:09:56  
I swapped a johnsered 0920 piston with a 0930 same principle one ring for a two ring, do check the piston height from the wrist pin even a slight height difference changes the compression significatly.



[Log in to Reply]  [No Email]
bob

01-29-2004 20:53:29




Report to Moderator
 Re: piston swapping in chainsaw in reply to Rob, 01-29-2004 16:09:56  
as long as they are identical size & shape (wrist pin in same position?) you can. Stihl, Husky & others have models with same cylinder but different ring count. 2 ring is pro saw & 1 ring is ranch saw.



[Log in to Reply]  [No Email]
rob

01-30-2004 13:19:36




Report to Moderator
 Re: Re: piston swapping in chainsaw in reply to bob, 01-29-2004 20:53:29  
I Think I will look at the piston and try to find out it they are different. Thanks for the help.



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy