(800) 853-2651
SHOP NOW

420 questions

grandpa Love

grandpa Love

Well-known Member
Trying to help an elderly friend with
his JD,so he can sell it. I'm a Ford
and Farmall guy...... We got the 420
running, cleaned carb, new coil,
points, condenser,and rotor button.
Hadn't run in years. We pulled the
spark plugs out and poured some
transmission fluid in. Spun it over to
get most of it out. Still smoking! Not
worried about that. Won't stay running
more than 30-40 seconds. Back fires
through carb and dies. Couple times it
belched fire out the exhaust then
poofed out carb and died. Any thoughts?
I swear it's only running on 2
cylinders!! Lol.
cvphoto104774.jpg

Grumpy Deere
 
it only has 2 cyl's. checking the compression would be the first place to start. then remove valve cover and check valves for sticking and also do a reset on them . standard procedure.
 
"Won't stay running more than 30-40 seconds. Back fires through carb and dies."

My gut reaction is that the carburetor isn't getting fuel fast enough to fill the bowl. Remove the plug from the bottom of the bowl and check that you're getting a steady stream (like the size of a pencil) for at least 60 seconds.

If not, work backwards from there up towards the tank. Be aware that there is a screen as part of the 90 degree fitting at the carb.
 
Right now it has a temporary gas tank on
it. That tank has good flow, we have
used it on many tractors. Tractor tank
was full of old gas, but surprisingly
clean. Will get it plumbed correctly in
next couple days.
 
Sure sounds like it ran out of gas on the video. My guess is clogged elbow screen or a speck of trash in the load needle.
 
"That tank has good flow, we have used it on many tractors." Great, that eliminates the tractor's tank as a problem for now. But the suggestion was: Pull the drain plug from the bottom of the carburetor, and see what the flow from the drain hole is. A pint in two minutes or less? That test confirms flow into the carb bowl. Sorry, If that is what you did and meant flow from the carb was good; it wasn't clear you pulled the carb drain plug, your reference was to the tank flow as I read it.
 
You must log in or register to reply here.

Similar threads

B
MH 44 Won't keep running.
Replies
19
Views
365
stevieb49829
stevieb49829
O
IH504 gas
Replies
16
Views
479
used red MN
U
D
TSX-245 carb
Replies
2
Views
309
Hotflashjr
H
C
Johndeere 1956 AR styled running issues
Replies
7
Views
338
Dan in Ohio
Dan in Ohio
D
960...If it Ain't Broken
Replies
5
Views
469
Sean in PA
S
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