Tex Tyson
Hello:
New member, new question. Thank you in advance to any one who could help out. Servicing a Generac 7KW model 0065190. Problem is rough start, choke solenoid does not close at
all. After a couple of minutes it does smooth out. On shut down it it closes briefly but nothing on start up. Spark plug and oil were changed but did not help the situation any.
Battery also showed no signs of voltage drop on start up. Running on natural gas. Any info you experts out there could provide would be outstanding?
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78buckshot
Welcome to the forum. If in fact the choke is not being activated then you need to diagnose that circuit. Can you move the choke plate by hand?, if so then it could be a bad choke solenoid, bad control board, or bad wiring connection between the solenoid and control. If the engine is starting within it's normal crank cycles then I think the choke and throttle are working, you say after a couple of minute it smooths out. First thing I would do is adjust the intake and exhaust valve lash with the engine cold, then start looking for problems in the fuel supply. Give us the serial number from the name plate, describe the fuel supply piping and what type of fuel.
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Tex Tyson
Thank you 78buckshot. Will get back to it and take all this into consideration. Fuel supply is 1" to outside and breaks down to 3/4" galvanized on approach to generator. We checked supply with a manometer and it seemed good. This is running on natural gas. My serial # is 50016226. Thank you again for your time and fast response.
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Cobranut
Tex Tyson wrote:
Thank you 78buckshot. Will get back to it and take all this into consideration. Fuel supply is 1" to outside and breaks down to 3/4" galvanized on approach to generator. We checked supply with a manometer and it seemed good. This is running on natural gas. My serial # is 50016226. Thank you again for your time and fast response.


I'm thinking there's something about galvanized pipe that can contaminate fuel.
Not sure about LPG or NG, but I know it will ruin diesel fuel, and any engine you put it into, very quickly.
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78buckshot
Cobranut, you are correct, galvanized is not recommended for fuel, I have seen flakes of zinc plugging gas valve screens.
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Dick from Canada
As 78buckshot noted galvanized pipe should not be use . Black iron , and try to avoid offshore pipe as well. Have seen dirt and incorrect ASME numbers on some of it.That was awhile back ,they may have cleaned up there act . 
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Birken Vogt
I always call this out when I see it, somebody show me any official reference against galvanized.  In some areas it is required for exterior corrosion control.  Shiny flakes can come from a lot more than galvanized zinc.
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Tex Tyson
Ok guys thank you will take all of this into consideration... Thank you for all your input. Be back shortly.
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