Generac portable electric generator

55 50 Ron

Well-known Member
I have one that needs engine repair. Have been told they are hard to get parts for. I don"t understand why as Generac is still an active company. Not sure what is wrong with mine as yet. It"s a single cylinder 15 HP. It was working just fine and suddenly stopped just like the ignition was shut off. Not out of gas. It has oil so the "low oil" shut off wasn"t the problem.

Anyone have experience good or bad with this brand of generator??
 
Is the engine made by Generac also? When I serviced them the engines were either B&S or Tecumseh, aka Craftsman, except for some what had Kazahockies or something like that.
If the engine is made by another company, then you can contact a supply house for parts.
Have you checked for spark, if no spark, there could be a shorted wire from the low oil switch or one of several problems such as fuel flow. You can have gas in the tank, but it has to flow to and through the carburetor. Just a few thoughts.
 
no experience with generac but just because there is oil doesn't mean the low oil shutdown is not the problem. do you have spark? if not check your switch and maybe try bypassing the low oil switch. and of course try a new plug.
 
First thing I would do is pull plug, lay it on engine and see if there is spark.

Second thing is put a splash of gas in carb and see if it fires.

That's the fastest way to see if you have ignition or fuel problem.
 
Generac is known as Genajunk by us Generator techs. Unplug the low oil sensor. Onan and Generac both had problems with false shutdowns. That may be your problem.

As for the engine. Who knows. They buy engines by the truck load. From any source they can get.I have seen everything from Hino,Chevy,Ford,B&S,Tech to Topaz.Plus a lot more I did not list.If you have a common engine. Get parts from the OEM not Generac. Unless you have lots of money to spend.
 
You are right, I had one and it was the oil sensor, it would start up then shut down everytime and disconnect the sensor and it runs fine.
 
Probably too late for much help, but personally had a bad experience with a Generac. Bought a new 8500 watt unit for $1000 and had constant problems either getting to start or to restart after it was warmed up. Made many trips back to the dealer and at various times they replaced a broken valve spring, installed new carburator, replaced the head gasket and did several more things to keep it running. Each time worked for a couple of months after it came back but always developed starting problems. Didn't use it that often and treated the ethanol-free gas with Stabil. Had it about two years when I needed it badly one day and it wouldn't start which was the final straw. A friend offered $300 for it and down the road it went. He has had better luck; probably starts and runs it every other week. I replaced it with a 13,000 watt Honda which cost over four times as much. That has been over 15 years ago and haven't regretted the change. But at the time the big Honda was bought I started using Sea Foam rather than Stabil which might be a factor. Recently added a new 4200 peak watt Harbor Freight gen for less than $250 to use at another building and it has been a gem. Starts great with a stable and dead-on voltage output. Farming partner has a ten year old relatively cheap 2000 watt Briggs that is ridden hard and keeps on ticking. Only problem is that he occasionally uses ethanol gas and the gas line disintegrated. No beef about the generator portion, but would just about need to be given a Generac engine.
 

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