need choke out for long time

INCase · Nov 30, 2009

finally got the Case 800 gas going. It fires right up but needs the choke almost all the way out for about 5-10 minutes before its warm enough to push it in. (just sitting at med idle) I know there's about 600lbs of iron, 8 gal of water and 2 gal of oil to heat up but this seems a bit long to me.

Is this so or is something out of adjustment??

Thanks.

Blackhole49 · Nov 30, 2009

I know the proper police are going to lynch me, but: I had a 52 8n that started with full choke and ran on 1/2 choke summer and winter (I made a plastic shim to hold the choke 1/2 way). I tried rebuilding the carb once (obviously I missed something) to no avail. When I sold the tractor 15 years later, it still ran perfectly on 1/2 choke.

Uncle Ernie · Nov 30, 2009

Running better with the choke out indicates a lean condition. Usually a vaccuum leak. Also could be too small or partly plugged jets in the carb.

buickanddeere · Nov 30, 2009

Coolant temp ?

Brian G. NY · Nov 30, 2009

I would try turning the main jet out about a quarter turn; running too lean.

El Toro · Nov 30, 2009

Open that main jet as Brian suggested as this will enrich your fuel mixture. Most old garden
tractors have that feature too. Hal

INCase · Nov 30, 2009

The coolant temp takes quite a while to warm up too. I can take the choke back off about the same time the temp gage starts to move (around 150ish).

Mike (WA) · Nov 30, 2009

Before horsing around with jets in the carb (and possibly REALLY screwing things up), I'd make sure you're getting enough fuel from the tank. Should be a steady stream when you take sediment bulb off and open the valve.

cadet trooper · Nov 30, 2009

I agree with Brian and El Toro and it don"t take much. Older carburated motorcycles had the same malady had to run the choke out about 3/4 for about 5 or 6 miles before you could push it in and if you adjusted it a little richer for cold it would gag you out at the light and you had to clean it out constantly before you took off.

BCnT · Nov 30, 2009

personally i'd check spark plug color for a nice tan color after about 20 minutes of working tractor under a medium load...a carb set up correctly will need choke until engine reaches operating temp.
if plugs look white or have blistered looking porcelain...then richen mixture a little.

supergrumpy · Nov 30, 2009

put a piece of cardboard in front of the radiator, will warm up a lot faster, in cold weather you can likely leave it there

buickanddeere · Nov 30, 2009

Sounds reasonable with temp vs. choke.
A new 195F stat may help, the old stat maybe stuck partly open.

Leland2 · Nov 30, 2009

How old is the gas ? saw that cause the problem your describing before

olgentdc · Nov 30, 2009

, Sounds like a Vaccum leak somewhere ... tighten the intake manifold gaskets check for leaks , alsoCheck to insure the ferruls are presenton the intake side Especially , However Ferruls are necessary on Exhaust ports to keep from blowing out deterioting the gaskets ... has the carburator been given a good cleaning and overhaul/ ,, what about proper valve gap ?,, all could contribute to a sickly running gasser

INCase · Dec 1, 2009

Gas it pretty new. Carb has not been gone thru since I've had it. I have another Carb for it that I've rebuilt that I may swap. I will probably try to adjust this one 1st though.

INCase · Dec 1, 2009

Actually it has a new thermostat. I is a Napa not a Case one but was listed at 190 or 195. I didn't check it though.

I may try to start it tonight if I get a chance and the battery is strong enough. It has been good about popping right off with little cranking.

Anonymous-0 · Dec 1, 2009

(quoted from post at 16:42:07 11/30/09) The coolant temp takes quite a while to warm up too. I can take the choke back off about the same time the temp gage starts to move (around 150ish).

Thermostat?? I'm a one thing at a time guy whether eating dinner or working on something (as much as possible. Replace the thermostat and get it warming up on time. just might fix the choke problem at the same time.

Good Luck.

Dave

bill65ss · Dec 1, 2009

My 53 SC is doing the same thing. I just took off the manifold and sure enough, one of the ferrules was missing.Can I still get them from CaseIH, or do I have to make them?

buickanddeere · Dec 1, 2009

Don't why I didn't think of it earlier but a block heater will do wonders for an engine. Even if it will start without pre-heating.
The engine uses less fuel and suffers less wear when warm. The starting and charging system wear less as well.
Careful if closing off the rad airflow with a board. If the fan isn't evenly loaded they can flex,fail and fly through the rad.

http://www.phillipsandtemro.com/coldStart/engine_block_heaters.asp

olgentdc · Dec 1, 2009

Case wants $40 each , MAKE THEM out of tail pipe stock ,slit and roll in tighter , Don't matter if it overlaps (I THINK ), , watch out for the intake and exhaust gases mixing together on the Notorious SC , you may need to send them to a good macine shop or George MD if it is burned thru,.

need choke out for long time

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