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I purchased a B & S generator a few years back. I got it after a storm left us without power for a few days. Never used it till this weekend when hurricane Fiona left us without power for about 48 hours. So it had been sitting in the basement for a few years never having been run.

I started the generator and found it running a little rough. The exhaust smelled pretty bad and it seemed like it was running a little rich. I used it off and on for a couple hours at a time and each time I started it a small puff of black smoke came out of it. While it was running I removed the air cleaner cover and thought it ran a little better, I also removed the air filter but did not see any more improvement. Having no experience with it before, I thought it was burning fuel quite quickly, as it ran about 2 1/2 Hrs on 1 US gallon (3.78 liters).

I think it could use a little carb adjustment but have not been able to find any adjustment screws on the carb. I have not taken the plastic covers off of it as I would like to determine if there are even adjustment screws on the carb. Photos of the unit below and what information I can find on the engine/body of the unit.

Unit Info:

Briggs and Stratton
P2200
Mod. REV
030051-00
Year 2018 Jun 2018
Disp 111cc
EXH Family JSEMS.1111SM
EVA Family JSEMPNHE0001
Carberator Make: Huayi

There are numbers on the carb. around the top of the bowl but I can't see them all to include them here. I do not see any numbers for Type, Code, etc but they may be on the engine and I might have to dig a little deeper to find them

I don't know if this is enough info to help me adjust the carb, but if you can provide some insight I would greatly appreciate it.

A little information that might help you out.
Briggs model number is 030545-01.
Carb number is 705940.
Carb is non adjustable,
To me it sounds like the unit was stored with old gas in it. If it came to me I would try this, may of may not work. Get a gallon of non ethanol fuel, 92 octane or higher, and run the entire gallon through the unit. I’ve had good luck doing this to clean the carb, if it is nor gummed up to bad. This is my old farts quick type. If this doesn’t work you’ll probably have to remove the carb and give it a good cleaning. If you will be storing this unit for 30+ days I would one store it with a product like Tru-Fuel, which is what I do. I also make sure I run my unit for about 30 minutes every 90 days.

Thank you Rivets. I appreciate the advice very much. I thought that carb might not have any adjustments, that is disappointing. I will try what you advise.

Good advice. My late 90s briggs genny still runs like a champ. I like to mix a tuna can full of rec90 (non ethanol) pump fuel with some marine grade (tcw-3) ashless 2 stroke oil (1 oz or so) through the tank every 3-6 months under load for about 10-15 minutes. Never had any issue doing this. The Rec fuel is great for small engine fuel systems and long term storage applications.

When I am going to be running my machines weekly, I mostly use reg87 then alternate to rec.

shurguywutt said:

Good advice. My late 90s briggs genny still runs like a champ. I like to mix a tuna can full of rec90 (non ethanol) pump fuel with some marine grade (tcw-3) ashless 2 stroke oil (1 oz or so) through the tank every 3-6 months under load for about 10-15 minutes. Never had any issue doing this. The Rec fuel is great for small engine fuel systems and long term storage applications.

When I am going to be running my machines weekly, I mostly use reg87 then alternate to rec.

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Not sure I know what Rec fuel is and I have never heard of it being available here. The TCW 3 method sounds interesting but I never would have thought of running it thru an engine that takes straight gas. These approaches would not help clean the carb but would be intended for maintenance purposes I take it.

Double check your model as it appears to be 030651-00 in of 030051-00. As usual with Generac made generators the carburetor parts are available just a complete carburetor. So you would need PN 311392GS (carburetor); unless, a simple cleaning can be done.

I would drain the gas and use fresh gas. Old gas does what you describe.

Berniebac said:

Not sure I know what Rec fuel is and I have never heard of it being available here. The TCW 3 method sounds interesting but I never would have thought of running it thru an engine that takes straight gas. These approaches would not help clean the carb but would be intended for maintenance purposes I take it.

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I don't know what Rec fuel is either. I have poured regular oil down in the piston hole and turn it by hand before
winter storage just to keep the rings lubed. Who cares if it smokes on start up? Fuel Stabilizer or Drain it? I've
done both over the years.

Wouldn't hurt to run some Sea Foam through it and things might clear up.

Rec fuel is just non-ethanol pump fuel you can get at the gas station

Today I picked up some fresh high test fuel and filled the generator with it. I ran it for about an hour and it seemed to improve but I thought it was surging a bit and I was not happy with it. So I pulled the carb and cleaned it out and it seems to be running fine now. So I think between the high test gas and the cleaning we have cleared up the problem. I am just waiting for it to run out of fuel, then I'll drain the bowl and put it back into storage.

I can buy high test here (92 octane) but it appears from the note on the pump at the gas station that all our fuel could contain up to 10% ethanol. I may not be able to buy ethanol free gas.

Checked my model number and it is 030651-00 as noted above. Good catch on that one.

I think what happened was the unit was built at the factory and they put fuel in it to see if it would run and generate electricity. Then it got shipped with a little fuel left in the tank and carb. I purchased it, brought it home and stored it in my basement for years and the fuel from the factory gummed up my carb and caused the rough running.

Thanks to all for your help, I appreciate the input so much.

Just a suggestion about storing your unit, which you can use or dump. After you have run the engine “dry”, removed ve the gas cap. Put a small pan under the carb, remove the carb drain plug and drain the entire system, let sit for an hour. At 30 minutes take compressed air and blow out the tank. After an hour install the drain plug and fuel cap. What you have done is dried out the entire system and the next time you have to use the it the system will be just like you purchased it.

Rivets said:

Just a suggestion about storing your unit, which you can use or dump. After you have run the engine “dry”, removed ve the gas cap. Put a small pan under the carb, remove the carb drain plug and drain the entire system, let sit for an hour. At 30 minutes take compressed air and blow out the tank. After an hour install the drain plug and fuel cap. What you have done is dried out the entire system and the next time you have to use the it the system will be just like you purchased it.

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Done and Done.

But another problem has surfaced. Some where in the process of cleaning and preparing for storing the bowl gasket got torn. Its a flimsy little thing. Now I have to find a new bowl gasket and it seems to be difficult to find a parts diagram with part numbers in order to order a part. Can you help with finding parts for this carb??? Internet search finds a few things in general but nothing specific to this carb. Could I get away with finding a rubber O-ring the correct diameter and just use an O-ring?

Best suggestion I can give you is to contact Briggs directly about getting the individual gasket. Your carb part number is 311392GS. This phone number may be of some help, 800-743-4115, make sure you have all you unit and engine numbers. The only other option is to go to your local Briggs authorized dealer and talk to them.

Rivets said:

Best suggestion I can give you is to contact Briggs directly about getting the individual gasket. Your carb part number is 311392GS. This phone number may be of some help, 800-743-4115, make sure you have all you unit and engine numbers. The only other option is to go to your local Briggs authorized dealer and talk to them.

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Thanks again. Will try.

I've recently purchased Generac iQ3500 Source: https://www.propaneva.com/best-generac-generators
I have owned other generac products before and have been disappointed by them, ironically the last generac generator I owned was a gp3300, and that model was a standard pull start model not inverted and not clean power.

This is the total opposite of that.

This thing is totally silent, so quiet we chained it to one of the blocks at our fireworks tent for we were afraid someone might steal it.

Anyway I got this to directly replace the noisy older GP 3300 and I have to say this is one of the best generators I have ever owned. As mentioned this thing is near silent, even under full load it's near silent. It provides roughly 3100 Watts continuously for our purposes.

Some of them emergency gennys have a drain in the fuel bowl. Try this before floging the carb and others things. Turn off the gas tank petcock, remove the carb bowl drain and let the carb bowl empty then while the drain plug bolt is out turn on the gas and flush the bowl. Use a small container to catch the fuel being drained so as it's not all over the unit and floor. Re-install all and test.