ml1116 Show full post »
75Shark
MikeCB;37792 wrote:
I know you say you've had service companies look at it, but are you sure they are looking into the gas situation thoroughly? Too many times I have been called as a "second opinion" and fuel volume was the issue. People tend to test static pressure (not running) and its fine. But then you turn it on and the pressure falls on its face. I would look further into the fuel. Especially if you have been having issues from the get go.

Mike


Mike

I do not know for sure, but you are probably correct that static pressure was checked. I recently had a new tank installed and pressure tested. I was not home, but I would be surprised if they checked the running pressure.

Thanks
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75Shark
hoghead;37793 wrote:
75shark , there was a service bulletin to replace the air box and choke. What is the ser number?


The serial number is 4955951.

Thanks
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Matty
ml1116: Did you find any solution to this? I have the same issue with my 14kW Generac Guardian, same thing, if I cover the Carburetor intakes it starts right up, otherwise will go into overcrank.
Valve lash checked, new spark plugs, battery is good...Model # 0053720 (GT-990 engine).

Thanks a lot, don't know what to do anymore!
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VNV1967
Peddler wrote:
Look carefully at the choke plate to make sure it is flush with the venturi. If it starts good with manual choke or additional choke my first look would be to make sure the choke plate is sealing properly. I often have to disassemble the choke in order to manipulate the plate and pivot shaft to where it is perfectly flush. Also there where some units that had bad air boxes which had to be replaced. It had something to do with the port in the choke shaft I think. There was a bulletin on this, I think. Good Luck, Peddler



Here's my two sense worth...I think Peddler is on the right track....I had a similar problem. Hard starting. After going thru a bunch of stuff, I decided to check out the choke Meck I found some kind of insect critter moved into the solenoid housing and built a little nest fouling the meck causing the choke not to operate fully. Pic shows partially removed nest. Then I cleaned up the connector and all was good. 

When it cranked after about 4 seconds the choke arm moved and the genny started right up. Not saying this is your problem but watch the choke arm while cranking.....make sure it moves. 

Good luck
generac pic.jpg  2.jpg 
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Matty
Thanks VNV1967,

I looked at the choke plate, however, it seems to sit pretty flush over one of the intakes. No visible gap, also it doesn't move down, if i apply a little pressure from above.
When cranking, it moves freely back and forth between fully covering one of the intakes + half of the other one and covering none of them.

However, i noticed quite some air movement around the closed airbox when engine is running, so i wonder if there's a leak somewhere...

Any other ideas? Did anyone try replacing the airbox to solve this?

thanks a lot!
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