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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

I have a Coleman 1850 generator that would not run unless I used an engine starter. Electrical seems to be fine. Have rebuild carb and cleaned entire fuel system. Generator runs only in choke position. It will not rev up even after manually turning the idle control. Engine sat for 3 years without running. New fuel is in the gas tank now and the engine appears to getting plenty of gas. What are my next options? Thanks, mark

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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.

Posted on Nov 22, 2013

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Posted on Jan 02, 2017

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SOURCE: Coleman Powermate 6250 only runs with choke closed/air restricted

A call to Elliott Small Engine solved my problem - Oil Guard. I had checked the oil and it was just a little low but seemed well within the normal range. I was told to add more, bringing it just over the Full mark. It seems that the low oil protection system is very sensitive and shuts down the engine even when the oil is withing 1/8" of the mark. I added about 2-3 oz of oil and no more problems

Posted on Dec 16, 2008

dmftrucker
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SOURCE: Engine starts and runs fine for about a minute

try to clean out the carb first with auto parts carb cleaner, then you may need to buy a totally new carb for the unit, as this company will NOT sell parts for these carbs due to the carb setting is sealed & has to stay at a set level for voltage output and setting

Posted on Nov 05, 2009

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didnt specify the make and model so generic answer ---check fuel mixture is correct --check the filter in tank is not plugging up--look for damaged / crack in fuel feed lines-look at spark plug --carb may need cleaning --exhaust port may need cleaning

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Idles with 1/2 choke. If open choke, or throttle - engine dies without any RPM spike. Carb was cleaned, jet is clean. When idles, there is gas in the primer bulb.


Hi, Andrew and the usual suspects are:

1. Fuel cap or fuel tank is not venting properly.

2. Fuel filter clogged.

3. Fuel line pinched or kinked.

4. Float needle and seat sticking.

5. Float level too low.

6. Carburetor bowl vent line clogged/blocked/pinched.

7. Idle adjusting screw set too low.

8. Air/fuel mixture screw set too lean.

9. Idle port, transfer ports, slow air jet clogged.

10. Slow fuel jet clogged.

For more information about your issue and valuable free downloads that you will need please visit the websites below. Good luck and have a nice day.

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Hi, Anonymous and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting ***** set too low.
8. Air/fuel mixture ***** set too lean.
9. Idle port, transfer ports, slow air jet clogged.
10. Slow fuel jet clogged.
For more information about your issue and valuable "Free" downloads that you will need please Click on the links below Good luck and have a nice day.
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http://www.yamahaventure.nl/pdf/servicemanualxvz13tf.pdf
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sounds like it could be the air to fuel ratio. if it only want to run with the choke on. I would say to make sure all your nuts and bolts are tight and that you check the gaskets in between the carb and the motor. another thing you could do is get a can of starting fluid and spray it around the carb while the motor is running (do not spray it in the carb)if the idle changes or if it dies you need to replace gaskets.

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Sounds like contamination has set into the fuel shutoff valve on the bottom of the fuel tank, or the fuel cap vent hole is plugged. Test the fuel line that comes from the fuel tank. First turn the valve off, disconnect the fuel line that feeds the carb, insert the fuel line into clear small container, then open the fuel valve to the on position and look for fuel flow,now turn the valve to the reserve position and check again for fuel flow. If these test fail to yield fuel try the procedure again this time with the fuel tank cap loosened and check for fuel flow. If in both tests the fuel fails to flow then the problem can be isolated to the fuel valve/tank outlets or the fuel line to the carb.

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Typically a surge is caused by a lean condition. I'd say the float is set to low and this is causing the engine to lean out & when you apply the choke it richens it back up.and the surge stops.

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Have you removed the carb. and tried to clean it? If not, get the numbers off the carb. and pick up a repair kit for it. Dismantle it, clean all orifices, remove the low and high speed needles (may only have one and count number of turns each one is at by screwing in until lightly seated then remove ) and clean passages with carb. cleaner. Reassemble, install, adjust initially with original settings and start. Adjust from here. Little carbs. are very "touchy" when adjusting.

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