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

Restoration & Repair Tips Board

Zama carb problem for Stihl FS85T

Welcome Guest, Log in or Register
Author 
Barry Lindler

02-24-2004 16:18:46




Report to Moderator

I have a used stihl fs85t with a zama carb. I have rebuilt the carb and got it running, but it will only run if the choke is full on. with the choke on, I can adjust it, and accelerate, but when I start to take the choke off, the engine speeds up a bit then shuts off. I have cleaned the carb many times, and rebuilt it. I have tried it with new fuel lines as well, but I have the same problem. I've checked the fuel filter in the tank, changed the air filter, and cleaned the muffler. I'm very frustrated. Does anyone have any ideas? Is it okay to run it on choke? Any help would be appreciated!

Thanks!

[Log in to Reply]   [No Email]
Van in AR

02-25-2004 07:32:59




Report to Moderator
 Re: Zama carb problem for Stihl FS85T in reply to Barry Lindler, 02-24-2004 16:18:46  
If the carb is good and sealed to the head good and all of the fuel lines are good the next thing I would check is the crankcase seals on the end of the crank and between the jug and crankcase. A air leak here will make it run way lean and the choke richens it back up.
van



[Log in to Reply]  [No Email]
Barry Lindler

02-25-2004 08:51:08




Report to Moderator
 Re: Re: Zama carb problem for Stihl FS85T in reply to Van in AR, 02-25-2004 07:32:59  
I'm hoping that is a pretty straight forward thing to check, as I have never done that- but if I can tear down and rebuild a carb, I should be able to check what you recommend- any tips before I start tearing the engine apart?

thanks,
barry



[Log in to Reply]  [No Email]
Van in AR

02-26-2004 18:21:57




Report to Moderator
 Re: Re: Re: Zama carb problem for Stihl FS85T in reply to Barry Lindler, 02-25-2004 08:51:08  
If you have a air hold fitting tool you can take the carb off and bolt up a dummy plate with a gasket and put about 5 PSI on the spark plug hole. Move piston up to cover exhuast port, then listen for the leakage or spray soapy water around crank seals etc. Other than that I would say just change them out, as you already have some money invested in the saw.
Van



[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