Yesterday's Tractor Co.
Shop Now View Cart
   Allis Chalmers Case Farmall IH Ford 9N,2N,8N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   Traditional YT Forum ViewClassic View   RegisterRegister 
 ProfileProfile    Log inLog in 

Colder Plug for 641 with high compression pistons


 
Post new topic    
View previous topic :: View next topic  
Author Message
anwalker
New User


Joined: 20 Jun 2016
Posts: 12


Report to Moderator

PostPosted: Tue Jun 28, 2016 4:55 pm    Post subject: Colder Plug for 641 with high compression pistons Reply to specific post Reply with quote

So I ordered a rebuild kit this winter and instead of coming with stocker flat top pistons it came with dome tops. Not knowing any better the autoparta guy crossed the al437 with the champion rc12lc4. My engine is diessling bad and the plug shows symptoms of being lean. I think I may need to jump to a colder non resistor plug? Suggestions?
 
Back to top
View user's profile
Royse
Tractor Guru


Joined: 17 Jan 2011
Posts: 18253
Location: Ionia County Michigan

Report to Moderator

PostPosted: Tue Jun 28, 2016 5:46 pm    Post subject: Re: Colder Plug for 641 with high compression pistons Reply to specific post Reply with quote

Autolite 216 or Champion H10 would be cooler than the 437.
I don't know about the ones you have in there.
 
Back to top
View user's profile
mmfan55
Long Time User


Joined: 14 Sep 2013
Posts: 1246


Report to Moderator

PostPosted: Tue Jun 28, 2016 5:49 pm    Post subject: Re: Colder Plug for 641 with high compression pistons Reply to specific post Reply with quote

How fast does it idle ?? Many times
dieseling is a result of gas still
getting sucked through the carburetor
because the throttle is open too far.
If idling too fast changing plugs will
accomplish very little.
 
Back to top
View user's profile
anwalker
New User


Joined: 20 Jun 2016
Posts: 12


Report to Moderator

PostPosted: Tue Jun 28, 2016 5:51 pm    Post subject: Re: Colder Plug for 641 with high compression pistons Reply to specific post Reply with quote

CVPost-mmfan55 wrote:
(quoted from post at 18:49:36 06/28/16) How fast does it idle ?? Many times
dieseling is a result of gas still
getting sucked through the carburetor
because the throttle is open too far.
If idling too fast changing plugs will
accomplish very little.


I beleive it's set at 550 right now. She's still going through breakin.
 
Back to top
View user's profile
mmfan55
Long Time User


Joined: 14 Sep 2013
Posts: 1246


Report to Moderator

PostPosted: Tue Jun 28, 2016 6:36 pm    Post subject: Re: Colder Plug for 641 with high compression pistons Reply to specific post Reply with quote

Sometimes on my pulling tractors: I
will grab hold of the carburetor
linkage or throttle shaft when I shut
it down and push it closed to avoid
dieseling. Some governors tend to
allow the throttle to open a bit as
the engine rpm slows.
 
Back to top
View user's profile
anwalker
New User


Joined: 20 Jun 2016
Posts: 12


Report to Moderator

PostPosted: Tue Jun 28, 2016 6:39 pm    Post subject: Re: Colder Plug for 641 with high compression pistons Reply to specific post Reply with quote

CVPost-mmfan55 wrote:
(quoted from post at 19:36:12 06/28/16) Sometimes on my pulling tractors: I
will grab hold of the carburetor
linkage or throttle shaft when I shut
it down and push it closed to avoid
dieseling. Some governors tend to
allow the throttle to open a bit as
the engine rpm slows.


Now that I think about it, I haven't adjusted the governor springs yet.
 
Back to top
View user's profile
Dean
Tractor Guru


Joined: 29 Jan 1998
Posts: 22762


Report to Moderator

PostPosted: Tue Jun 28, 2016 7:37 pm    Post subject: Re: Colder Plug for 641 with high compression pistons Reply to specific post Reply with quote

Spark plug heat range is likely not the problem.

Set the idle to 450 RPM or less and reduce the engine to idle speed before shut down.

Adjust the carburetor to obtain correct mixture under load.

Dean
 
Back to top
View user's profile
David G
Tractor Guru


Joined: 11 Jan 2008
Posts: 29337


Report to Moderator

PostPosted: Wed Jun 29, 2016 4:31 am    Post subject: Re: Colder Plug for 641 with high compression pistons Reply to specific post Reply with quote

Dieseling is caused by idle set to fast, slow it way down.
 
Back to top
View user's profile
RickB
Tractor Guru


Joined: 16 Oct 1998
Posts: 6754


Report to Moderator

PostPosted: Wed Jun 29, 2016 1:59 pm    Post subject: Re: Colder Plug for 641 with high compression pistons Reply to specific post Reply with quote

You are right about the guy not knowing any better selling you Champion plugs.
 
Back to top
View user's profile
anwalker
New User


Joined: 20 Jun 2016
Posts: 12


Report to Moderator

PostPosted: Wed Jun 29, 2016 2:58 pm    Post subject: Re: Colder Plug for 641 with high compression pistons Reply to specific post Reply with quote

This tractor is how my grandfather made his living and the first time it's ever been rebuilt. Started it up to discover the new wedge seals were leaking, along with the radiator and oil filter adapter. I just put the oil pan back on last night and filled her back up with oil, hopefully I'll have the radiator back on this week. I still need to install a new set of points, change the plugs over to 437 or 216 autolite and get the timing dialed in, and adjust the idle down. I pulled the champion plugs yesterday and they were running leeeean. My timing light is on a permanent loan so I'll need to pickup another. Gotta get this thing going and back on the farm. Lots of work to do and running way behind.
 
Back to top
View user's profile
David G
Tractor Guru


Joined: 11 Jan 2008
Posts: 29337


Report to Moderator

PostPosted: Thu Jun 30, 2016 11:29 am    Post subject: Re: Colder Plug for 641 with high compression pistons Reply to specific post Reply with quote

Plugs don't run lean, they are an indicator of what the engine is doing.
 
Back to top
View user's profile
:   
Post new topic    Yesterday's Tractors Forum Index -> Ford All times are GMT - 8 Hours
Page 1 of 1

 
Jump 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 ]

YT Home  |  Forums

Modern View Forum powered by phpBB © 2001, 2005 phpBB Group

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