(800) 853-2651
SHOP NOW

Carb problems

D

ditchwitch

Well-known Member
Carb has been rebuilt ,i cleaned checked and double
checked float and everything. motor has been rebuilt
also so all of this is new parts. Problem is when i
turn the adjusting screws to adjust carb it has no
effect on motor running at all, it will screw in and
cut gas off other than that nothing, i can actually
screw both all the way out and it still run. any
advise would be great
 
depending on the carb, I have worked on a to30 tractor and my experience is the small adjustment screw controls idle only and turn that screw in will make the fuel mixture more rich which that screw should not be turned out more than 7/8 of a turn. as for the large adjustment screw it will control power at higher rpm, and I'm to understand from the factory it was to be adjusted under a load which is near impossible. one other thing to check is to make sure carb and intake are sealed good to each other and the block a quick test is to spray both area with carb cleaner while engine is running and listen for rpm changes, if so you have a leak and that will change how the carb reacts to adjustments
 
Thanks Z-man, i give it a try and see what happen now here shortly. i have rebuilt this tractor here at work. just got it fired up last night. I will update shortly
 
ok Z-man, no leaks but i did do a little adjusting on the throttle linkage, actually the tractor runs great but still the idle screw does not have any effect at all.
 
it probably won't make a difference by leaps and bounds but adjusting the idle screw should make the engine run smoother at some point, the more gas you gas the engine the less the idle screw does. make sure the idle speed is around 400 rpm and the timing is set at 6 degrees btdc. the slow the engine is turning the more effect the idle screw will have when adjusted
 
You must log in or register to reply here.

Similar threads

K
Jacobson G10 Help
Replies
6
Views
330
mhb@ufe
M
S
Cleaning outside of IH I20 brass carb
Replies
9
Views
441
rustred
rustred
M
John Deere 1010 dozer not starting
Replies
6
Views
439
Dan in Ohio
Dan in Ohio
B
MH 44 Won't keep running.
Replies
19
Views
353
stevieb49829
stevieb49829
6
MF65 starts and dies right away
Replies
2
Views
255
60mf65
6
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.

Copyright © 1997-2024 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

Back
Top