Briggs Vanguard motor will not throttle up


Old 09-01-13, 03:12 PM
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Briggs Vanguard motor will not throttle up

I have a Briggs vanguard motor 28Q777-0691-E1. It starts and idles fine but will not rev up very well. It acts like it is hitting a governor or something. I have replaced the fuel pump and replaced the electrical plug at the bottom of the Carburetor. If I reach in and try to rev it with the throttle it revs up but is just flat. any suggestions?
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Old 09-01-13, 04:34 PM
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If you're opening the throttle directly by hand and it's going nowhere, it's probably a fuel supply issue. It could be before the carb or inside it.

If you have a fuel pump, disconnect the fuel line from the carb and spin the engine over. Catch the fuel in a jar so you can see how much it's pumping.

If no pump, then disconnect the line and check it for a full stream. If it's just a trickle, work your way back up to the fuel supply and check for obstructions or a plugged filter.

If you have a good flow to the carb, you'll have to take the carb off and clean it.
Old 09-16-13, 10:26 AM
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Internal governor might be broke.
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