Have 10 horsepower Briggs Generac will not rev up under load

If you need to have new diesel generator set, maybe you can contact [email protected]

Need the model number of the motor

When you get the under speed alarm is the generator under load? Try manually starting the generator with no load and let it run for a while, if no alarm, then put it under your home load and measure current draw (maybe have an electrician check it) if the amp draw and in rush caused by compressors, pumps motors etc are within the generator rating, check your fuel pressure, on average 8-11 WC Nat gas. Pressure may test well under no load but drop starving the engine of fuel unde rload. Underspeed is just that engine cannot make RPM/Frequency

its possible the overspeed is set to sensitive. or your rpm are to high. these are preset in the factory as a safety, check your manual to ensure your rpm speed is in the pre set area. generators will do this under load when you have a big load on them or take a load off. the governor will some times over compensate causing it to trip on overspeed.

Try that number through a Briggs and Stratton parts dealer. Your generator is now owned by Briggs and Stratton Power Products division.

Go to the Briggs and Stratton website and go to their generators then to Generac. You should be able to track down a link to putting in your model number. (4) PDF manuals show for that model. http://www.generac-portables.com/service_support/owner_manuals/owner_manuals.cfm?rd=1

I am assuming the generator worked fine before the oil change. Now that you have done the oil change the genset does not start. These generators have a safety switch, which is basically an oil pressure switch that keeps the engine from running when there is not enough oil in the engine. Make sure that there is enough oil and if there is, look for a wire that runs along side of the engine to a round component. disconnect that wire and try starting. If it does not start then try to ground out the wire to the engine block. If this does not work, then there is other engine problems.

Oil level in pump and motor OK? Spark plug not fouled? Has it sat for a while - carb dirty? Running (loaded) throttle rpm not high enough?

you could try a briggs and strtton dealer as they took over generac but think with it being a tecunseh engine you will have a big problem as that side of the company went under a few years back,sorry cant be of more assistance