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

Garden Tractors Discussion Forum

17 hp Briggs

Welcome Guest, Log in or Register
Author 
buckva

12-10-2006 14:09:43




Report to Moderator


Model 42A707 Type 2238E1 Code 9803205A. This engine is difficult to start. Acts like Tight engine due to compression. Good battery plus jumper/charger will just turn it over and finally started. Checked the flywheel key and it is not sheared-key ways line up. Battery is notthe problem and starter works but could be weak. When engine cold I can turn it with the palm of my hand on the flywheel screen but when it comes up on compression it is difficult and slow to turn. I sorta consider this normal. It starts fairly easily on one cylinder--spark plug removed on right bank with carb. forward. I have to use a 1/2 ratchet and large socket to turn it when hot. Engine presently in mtd yard machines but I plan to transplant it into a John Deere 70 once I have it workin good. It started actin up and was set aside 1/2 way thru this past mowin season. You are welcome to scold me for what I have if in you can tell me how to fix this scutter. Thanks in advance.

[Log in to Reply]   [No Email]
JT

12-14-2006 15:36:39




Report to Moderator
 Re: 17 hp Briggs in reply to buckva, 12-10-2006 14:09:43  
What you are describing is a weak starter. This is a horizontally opposed flat head engine and normally valve clearance does not get out of wack like the OHV engines. I would probably, if it were mine, take off the starter, take it apart, clean the communtator, recut the mica in the commutator, check brushes, and put back together and try it. Also check armature for any burnt looking spots on it also. Just another thing to look at.

[Log in to Reply]  [No Email]
Junkyard Dog

12-10-2006 19:47:59




Report to Moderator
 Re: 17 hp Briggs in reply to buckva, 12-10-2006 14:09:43  
I believe this is overhead valve engine ? If so, chances are the valves are out adjustment - very common on these engines. I have rocker arms actually fall off of pushrods on these but seem to run "okay" until this happens



[Log in to Reply]  [No Email]
Wrench Spinner

12-10-2006 15:28:31




Report to Moderator
 Re: 17 hp Briggs in reply to buckva, 12-10-2006 14:09:43  

It could be any of three things, A weak starter (Try jumping directly to the starter). Valve clearance could be worn out of spec. causing the compression release on the cam lobe to not function properly or carbon build-up on the pistons/heads upping compression.



[Log in to Reply]  [No Email]
buckva

12-10-2006 16:05:57




Report to Moderator
 Re: 17 hp Briggs in reply to Wrench Spinner, 12-10-2006 15:28:31  

Thanks for the reply. Compression release-- hadn't thought of that. Is there a maximum compression one should get for cold crankin compression and should the compression release be on only one or both cylinders. The possibly weak starter and carbon deposits I can check. Is there a method to adjust valves to get compression release workin again? Thanks again.



[Log in to Reply]  [No Email]
Wrench Spinner

12-10-2006 16:52:13




Report to Moderator
 Re: 17 hp Briggs in reply to buckva, 12-10-2006 16:05:57  

Briggs does not list a max compression pressure due to the release incorporated into the cam lobes on both cylinders. All they say is compare readings from both cylinders and they should be within 25% of each other. From my experience you wouldn't want much over 120lbs. Check valve clearance by removing both valve covers then rotate each piston (which ever side is being checked)1/4" past top dead center compression stroke. With springs still installed .004"/.006" intake .007"/.009" exhaust.
With springs removed .006"/.008" intake .009"/.011" exhaust.

You may want to check the valve clearance before removing the heads just in case they need to be adjusted. That is done by removing the valves and either refacing the valve seat or grinding the valve stem.

[Log in to Reply]  [No Email]
buckva

12-10-2006 17:29:40




Report to Moderator
 Re: 17 hp Briggs in reply to Wrench Spinner, 12-10-2006 16:52:13  

Thanks for the info. Have enough to keep me busy checkin it out for awhile.



[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