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I have a Coleman 1850 that only seems to run smooth when the choke is set at half way. When I fully open the choke the engine revs up and down and seems to want to stall.

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A fuel starvation problem.
Pull the fuel line off the carb..........the flow should be strong from the tank.
If not check for a blocked filter or fuel switch not allowing full flow.
If you do have a good fuel flow.......the restriction is in the carb.......a good cleaning will be next.
Usually it is the main jet that is semi clogged from storing the engine with out shutting off the fuel and running the carb dry.
After cleaning make sure all fuel in the tank is fresh.

Posted on Sep 13, 2009

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1 Answer

While adjusting choke to the run position my coleman 1850 generator stops running


If the engine stumbles and falls with black exhaust smoke it is choked down and is incorrectly adjusted, do it without the air filter on.

Feb 25, 2015 | Coleman Electrical Supplies

1 Answer

I have cleaned the gas tank, fuel lines and rebuilt the carb. It now runs but just at idle almost in the choke position. I have played with the throttle and it wants to die when I move it to normal ru


if it runs only in choke it sounds like its lean (choke reduces airflow and gets back to a mixture it will run on.....just). It could just be a small bit of crud in the carby jet. You cleaned the fuel system.....did you install or replace a fuel filter? sometimes cleaning the tank and lines stirs up stuff that needs to be filtered.....even though you may had cleaned and rinsed out a lot.

Nov 22, 2013 | Electrical Supplies

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How to start the generator


Hi Joe, I had asked for a little clarification and have not received any information. I will answer this question based on the generator is in good working order and it is a recoil start. Open the petcock, (this is the fuel valve) and give it about a minute to fill the fuel bowl on the carburetor. If your generator has an engine an on/off kill switch, set to on. If the generator has an auto idle switch set it to off. If the engine has a throttle lever located under the carburetor, push it all the way down (full throttle). Pull the choke knob out completely, there is a detent on the choke for half choke, pull it past this for full choke. pull the recoil starter rapidly. As soon as the engine starts running push the choke knob to half choke, this will allow the engine to run smooth while it's warming up. Depending on the climate that you are in, warm up time will vary. After a minute or two in cold climates start pushing the choke knob in, if it starts to run poorly pull it back out too the half position and let it warm up some more. When you can posh the choke in without the engine faltering it is ready to go. In warmer climates you might be able to start the engine without the choke or in the halfway position. Robin Subaru makes some of the finest small engines available. I would choose a Robin over a Honda every time. I hope this gets your generator going, and once again this is based on the generator being in good working order. Good luck, Michael Burke.

Dec 03, 2011 | Coleman Powermate Subaru 5000W Portable...

1 Answer

I have a coleman Generator 1850. It stalls when i


Hello, I would check the carb for being dirty inside. It sounds like the needle valve is dirty, or not adjusted correctly, or there is rust in the carburator and any of these can cause the fuel not to feed into the engine properly. A good cleaning of the carb and proper setting of the needle valves should clean it up. Also check the screen in the fuel tank on the fuel valve.

Jan 21, 2011 | Coleman Sport 1850 Generator

1 Answer

What's the best choke setting for starting a cold generator


Full choke to start, open choke partially immediately the engine starts to where the motor runs smoothly, continue opening as soon as you can while keeping the engine running smoothly. Be sure to open fully before leaving the unit, running it with the choke partially on can cause a rich fuel condition which tends to wash the oil off the cylinder walls and it also dilutes the oil with gasoline.

lp

Dec 26, 2010 | Coleman Powermate Portable Generator...

1 Answer

Coleman 1850sport plus when running pulses up and down it will only run properly with the choke half on and when shut off gas drains from carb, have cleaned carb three times no success help


double check the float ajustment and replace the needle valve for the float carb should be rebuilt kist run around $20.00 and the float about $6.00+ ajust the carb.
hope this helps

Sep 01, 2010 | Coleman Sport 1850 Generator

1 Answer

10HP Subaru/Robin gas on generator engine only runs smooth with choke half on, what can cause this? also the extra jet on the outside of carb what does it do?


Not sure about the "extra jet" on te side of the carb without a specific model, but running smoothly with half choke indicates that your mixture is lean. Choking it richens the mixture.

The extra jet may be your idle stop, or it could be the idle mixture adjustment.

Jun 29, 2010 | Coleman Electrical Supplies

2 Answers

Can't start my coleman 1850 generator


Need more info,

Does it turn over??

Does it have spark??

Does it have fresh petrol??

Feb 25, 2010 | Coleman Sport 1850 Generator

1 Answer

Coleman 1850 no/low generator output


Both the Hz and the voltage will be wrong if the engine speed is low. You need to use either a DMM with a HZ function to set the engine speed so that you get 61.5 Hz at no load, or use a tachometer to set the no load speed to 3750 rpm.

Carl

Feb 19, 2009 | Coleman Sport 1850 Generator

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