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Why does gas come out of what looks to be a vent line from the valve cover on my yamaha yg650de generator

Posted by john wolcott on

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rwvanlue

Roland W VanLue

  • 486 Answers

SOURCE: My Honda EM650 generator quits running after 15 to

'Vent is leaking while running': can be caused by varnish on the inlet needle/seat and debris in the float bowl.

Fuel Starvation - Float Bowl Carburetor
1) remove air filter assembly
*be cautious of tearing the mounting gasket. If it does tear, you HAVE to replace it. It is part of the priming system
2) remove the float bowl fastener. This is the main jet
3) carefully remove the float bowl, the rubber o-ring/gasket will not be able to be used if it is removed, you WILL have to replace it
4) using a spray 'carb cleaner'
spray up thru the center of the carburetor
spray and clean the main jet with cleaner and 'tag' wire
(tag wire is very thin, and can be used to clean the hole in the center of the main jet)
5) clean any debris from inside the bowl or carb body
6) re-install bowl and center bolt, air filter assembly

*if you need gaskets, your Briggs dealer can supply. The kit is cheaper than individual gaskets, and all the parts needed to finish the above repair are in the kit.

I’m happy to assist further over the phone at https://www.6ya.com/expert/rolandw_c013176d62ee17ae

Posted on Nov 22, 2009

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YG650DE Yamaha generator. Fires up perfectly, then shuts down after a minute. Will fire up again, run about 1 minute then shut down. Same thing over and over. changed out gas and oil. Help please


Since most generators are seldom used, gas left in the carburetor gunks up and stops up the passages.
Take lots of pix of the assembly. Pull the carb, remove the bowl and spray carb cleaner in all the holes you see. Don't let it back spray into your eyes. Wear safety glasses. Some holes/orifices may need to have a soft wire passed thru them.
Next time you store your generator, drain the gas, run the generator til all the gas is out of the carb. If you can get to the bowl w/o removing the carb, pull the bowl and spray the bowl and underside of the carb w/carb cleaner and reassemble.

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1 Answer

Where the fuel lines hook up off the gas tank


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