Small Engine Question

[kgblazerfive]

So it is tech but not chevy tech

Have a small generator with a 80cc engine attached to it.

Can not get it to run.

The carb does not come off the engine, (Harbor Freight generator 1500 watt)

I have drained and cleaned the tank. New fuel flows fine out the on valve.

I have pulled the plug on he bottom of the float fuel comes out.

I have pulled the fuel line and sprayed carb cleaner in it, it runs out the bottom of the float when the plug is out.

So basically I have taken everything off the carb that will come off. Sprayed them and the carb with cleaner. Ran air through the whole thing and as far as I can tell air moves where the fuel should be going.

It will run if I spray carb cleaner in the intake of the carb, not for long, but it will run.

Plug has been cleaned.

It only has about 5 hours if that on it and like four years of sitting with fuel in it.

Any body have any ideas

 

[AV8TER]

It sounds like you have some plugged up jets in the carb. You know you have spark and all other required items as it will run with carb cleaner down its throat. You will need to use some wire and probe out all the jets. You can use torch tip cleaners but just use the wire on the ends, not the bumpy part. That will hog the jets out and ruin them. When you think you have all the jets clean, look for more. It's easy to miss one.

 

[chulisohombre]

Same thing I was thinking. Clogged up jets. Or gummed up in the needle seat float area and not Letting fuel in. You should be able to see the jets through the underside float area on most small engines.

 

[diesel4me]

The carb should be removeable somehow...I'm not familiar with those generators though,maybe they are a one shot casted together deal with the block,though I doubt they would build it that way..

If you can get carb cleaner to flow into the float bowl,then the needle valve isn't stuck closed..but its best to remove the float and needle valve and clean the needle and seat good to ensure it'll bith let gas in,and close properly..

I'd try filling the bowl up with some strong carb cleaner or Seafoam if it'll go in thru the fuel line and let it sit several days,then take the bowl off and spray carb cleaner on the carb to flush any loosened crud out,then poke the jets out as suggested,I use wire from a twist tie as a poker to clean clogged carb jets on mower engines..

Unfortunately if ethanol gas was left in there that long,its probably a lost cause..if the carb has any diaphrams or primer bulb,they are probably shot by now..stiff as boards and useless..

The alcohol ethanol is made from is corn based,really ruins carbs,it attracts and holds water,and leaves behind a grain type residue most carb cleaners wont touch or remove..

I have tried boiling bad carbs in pure lemon juice that were left too long with ethanol gas in them and that seemed to clean that crud off them nicely..I read about that trick on a tractor forum,works as well or better than expensive carb cleaners do..

 

[kgblazerfive]

This is the carb in question

 

[diesel4me]

Hard to tell from the picture,but maybe the carb is held on by long studs that pass right thru the casting?...I would think it should be removeable somehow...

 

[paratrooper307]

I've never heard of a non-removable carb. Seems it would be more expensive to make such a complex casting than a separate piece. That being said, some harbor freight stuff is built with a limited lifetime in mind.

You're on the right track, make sure that carb is fully cleaned out. A rebuild kit may be a good idea if you can find one.