Author Topic: briggs engine and 2 stroke gas (Read 2235 times)

2wheels · « **on:** November 02, 2011, 04:43:57 PM »

Hey
We have a home made go kart with a 16 hp Briggs and stratton engine.

Now, we are having carb problems so that may be the only issue. Yes, it's been disassembled several times and cleaned the best I can. I still need some choke on for it to run.

But my question. I tried burning boat gas ( 2 stroke 50:1) but it's running lean. Do 2 stroke engines get different jetting in the carb because of the oil in the gas?
Would this be why is lean.

There could easily be other issues with the motor as it's been abused.

Thanks for any thoughts

Curtis750 · « **Reply #1 on:** November 02, 2011, 06:04:08 PM »

your lean due to a fuel starvation issue.

burning mixed gas wont make any affect other then it will smoke and stink.

needle and seat is factory set on these carbs and do not have any adjustment, remove all jets, brake clean and compressed air through them. If i remember correctly, there is an air jet that runs on the left side of the carb body, make sure it is not missing and causing too much air.

Retro Rocket · « **Reply #2 on:** November 02, 2011, 06:41:51 PM »

Correct me if i'm wrong but all the Briggs engines i am familiar with are 4 stroke, that being the case, it would run like crap with 2 stroke fuel in it.....

2wheels · « **Reply #3 on:** November 02, 2011, 07:03:07 PM »

For sure it is a 4 stroke. I'm just trying to burn up the boat gas (only a few gallons) it won't last till next year. And using it in the go kart would be great. I actually diluted it more so it's only 100:1 Hardly any smoke.

There is an air jet on the left side, I will play with that some more. Maybe I have it open to much.

I have cleaned and blew with 100 psi. But I don't beleive I've got it yet.
I didn't try break cleaner yet. Sounds like that is worth a shot.
Last year it was working great but the carb was left full and got all gumed up.

Thanks for the replies.

FrankenFrankenstuff · « **Reply #4 on:** November 02, 2011, 07:11:06 PM »

I alwayts thought that 2 stroke fuel lasted longer. I say this just from the fact that my chainsaw gets used every other summer. We had a big storm up here over the weekend. Monday I poured some of that old gas into the saw and SHAAAZAAAM. bring bring birng vring bring na na an ananana nanabring bring bring nananannana...and so on. I smiled like I had just invented the internal combustion engine. Moral of the story is...buy my chainsaw; no?

Gordon · « **Reply #5 on:** November 02, 2011, 07:30:46 PM »

Quote from: FrankenFrankenstuff on November 02, 2011, 07:11:06 PM

I alwayts thought that 2 stroke fuel lasted longer. I say this just from the fact that my chainsaw gets used every other summer. We had a big storm up here over the weekend. Monday I poured some of that old gas into the saw and SHAAAZAAAM. bring bring birng vring bring na na an ananana nanabring bring bring nananannana...and so on. I smiled like I had just invented the internal combustion engine. Moral of the story is...buy my chainsaw; no?

Doesn't 2-stroke oil typically have a fuel stabilizer in it?

FrankenFrankenstuff · « **Reply #6 on:** November 02, 2011, 07:39:23 PM »

LOL Gordon just ruined my magic. you smart guy, you smart.

Gordon · « **Reply #7 on:** November 02, 2011, 08:01:01 PM »

Pay no attention to the stabilizer behind the CURTAIN!!!

333 · « **Reply #8 on:** November 02, 2011, 08:30:00 PM »

Get me the model, type and code numbers, and if it's old enough(I have the service manual for older models), I can get you the initial settings for the carb. These numbers are stamped into the shroud near the carb.

dave500 · « **Reply #9 on:** November 02, 2011, 10:06:28 PM »

itll have a #$%*ty plug,have you tried a new one?how clean is the air filter,have a look at the inline fuel filter if it still has it.

FrankenFrankenstuff · « **Reply #10 on:** November 03, 2011, 07:12:57 AM »

OK. screw the question I just want to see a vid of the frigging go kart. No more
moto-nerd BS. show the Kart!!! yay!

333 · « **Reply #11 on:** November 03, 2011, 07:29:04 AM »

Well, there is that as well. I was going to wait for it to get running right. But yeah, at least a pic.

2wheels · « **Reply #12 on:** November 03, 2011, 03:02:59 PM »

The Briggs numbers
28Q777 0672A1 9602294A

I should note the battery is K0 (but not sandcast) so for those who feel they must go on tangents, go crazy.
Other than that there is nothing K0 here. ( well maybe the oil but I'm not sure)
"this is in reference to a K0 engine thread that has gone viral recently"

The spark plug is ^&*(( now, I think that might have something to do with running with the choke half on, and some 2 stroke oil.
I am getting that a little 2 stroke oil is not a big deal. Which was my question.

The air filter has got a couple years on it. But the engine runs the same whether it's on or off
The fuel filter and all the lines have been swapped, no difference.

My chain saw gets used once or twice a year and allways starts fine. But when we use the boat, the lake is in the middle of no where. I don't take unnecessary chances cuse I don't like paddling.

Sorry no video my poloroid camera cannot do that.
Besides this kart is really slow, build for a very young kid.

Retro Rocket · « **Reply #13 on:** November 03, 2011, 03:49:35 PM »

The 2 stroke won't hurt it but it probably will oil up the plug, i've put spare mower fuel in the car a few times over the years...

Duke McDukiedook · « **Reply #14 on:** November 03, 2011, 06:18:28 PM »

yep, 2 stroke mix will eventually foul up a 4 stroke plug- 1st thing to check.

FrankenFrankenstuff · « **Reply #15 on:** November 03, 2011, 06:35:17 PM »

Tha thing is rad.

333 · « **Reply #16 on:** November 03, 2011, 06:44:28 PM »

Too new for my book. But here's some info that might interest you.

28(cubic inch) Q(design series(?)) 7(vertical shaft(duh)) 7(plain bearing,pressure lubrication) 7(electric start(another duh)).

The type is explained by Briggs as this;
"The type identifies the engines mechanical parts,color of paint,decals, governed speed, and Original Equipment Manufacturer".

The code is your born on date.
96(year) 02(Feb) 29(th day) 4A(Plant- I don't have a list of these).

2wheels · « **Reply #17 on:** November 03, 2011, 07:13:41 PM »

The motor runs great but needs choke now, to run. It didn't last year.
I found this site.
http://outdoorpowerinfo.com/repairs/briggs_walbro_lmt_carb.asp

Picture 16 show a passage that I didn't know about and have not poked a wire through yet.
But I will.

My son really likes driving a machine he had a big part in building. I like it to run right.

Duke McDukiedook · « **Reply #18 on:** November 04, 2011, 08:14:09 AM »

Sounds like a clogged jet.
Too much air, but you knew that.

WhyNot2 · « **Reply #19 on:** November 04, 2011, 08:55:26 AM »

daaayyyy---yuuummmmm...........that things frame is made from wood............kewl.

The brass screw that holds the float bowl on has holes in it that need to be cleaned out too.

I think............................. $:-\$

2wheels · « **Reply #20 on:** November 04, 2011, 09:34:31 AM »

that things frame is made from wood

Yep, the only tools used, Black and Decker drill, wood saw, hack saw, wrenches, and a hammer of course.

Which is all we have.

Cheap fun

The link above, if it works for you, shows great pictures with explanations of the carb.
I wish I could dip the carb but the only stuff I found was 50 dollars a gallon, way to much. I may try the simple green as others here have talked about.

333 · « **Reply #21 on:** November 04, 2011, 09:44:20 AM »

Aerosol carb cleaner and compressed air. Do not go poking metal through passageways. You could damage something.

News:

Author Topic: briggs engine and 2 stroke gas (Read 2235 times)