Question about Rotary 38-6893 - Nikki Carburetor Kit

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Ok lets try this again I have a 13.5 b&s mower the float stuck in it and filled the crank case with gas I took the carb off and cleaned all the ports and jet but a small jet with an o ring on it fell out on the bench afriend told me it goes in the transfer tobe .ok is the transfer tube the one the main jet fits in or the lil one next to it and witcj direction dose this lil %%$$#^&&*% thing go I,m bout down to my last nerve with this thing even tried to take to the shop they can,nt even look at it for two weeks hhhhhheeeelllllpppp

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Go to and look up your engine parts and look for an exploded view of the carb to figure it out

Posted on May 09, 2017


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Lawnmower carburetor problem.

Remove carb float bowl. Check float operation. Float down gas flow, float up no gas flow. Clean float bowl. Observe bowl screw, see if there is a hole or holes thru the screw. Clean out with thin wire, bread wrapper works peeled back about an inch. Use wire to clean out center port of carb. Remove mounting pin of float, remove float and meter needle, clean out port up thru carb with wire. Reassemble try to start. Prime at least 3 times, ensure primer bulb is not cracked, replace if cracked. Replace air filter if dirty. Replace spark plug once a year. Fill oil. 30w. Mowers now have a low oil cutoff.

Jun 14, 2013 | Garden

1 Answer

13 hp tecumseh riding mower won't start unless gas is poured into carb. removed the bowl from carb has a wire snap holder float and needle and seat works OK and all passageways seem to be clean

remove the bowl again and get the centre jet out and lok very closely use a jewlers eye piece you wll find a passage that is plugged on the side of the jet look around it you ll see some sign of a hole that is not clear through its pretty small use a welders torch cleanng tool with various size rods use very thin one dont make the hole bigger


Oct 01, 2012 | Tecumseh Garden

1 Answer

I have a Craftsman LT3000 (purchased in 2006) with a 20hp Briggs Intek Plus engine. I changed the oil out a few months back, and used the mower. Due to the lack of rain, the grass hasn't been growing,...

The float on your carb. has gotten stuck. The mower sat for a long time with fuel in it and the fuel went bad and now the carb needs cleaning. With the float stuck the gas poured through it and into the engine crankcase. Do not run your mower yet. Change the oil (be careful when draining as the oil/fuel mix will flow out of the drain like water) and with spark plug out turn motor by hand several times work the fuel out of where the oil should be. Reinstall the plug. Clean the carb, making sure that the float and needle do not stick. The connector on the bottom of the carb that you unhooked, that is a solinoid valve and you need to make sure that it is not stuck also. Now you may put gas in tank if empty, let sit for a minute to see if level in fuel tank drops. If so you did not clean the carb well enough. Double check by checking oil for fuel. Try to start. You may only want to let it run for a few seconds and check oil for gas. Determine if you want to change oil again. If you are really lucky you did not due permanent damage to your engine when you ran it before. Only time will tell. Hopefully you are familiar with how the motor sounded before this incident, because you need to listen to it while it is in use for a while to see if sounds different to indicate if you do have damage. Good Luck!

If really helpful, please rate.

Jul 13, 2011 | Craftsman 20 Hp 42" Deck Lawn Tractor

1 Answer

Have a craftsman 4in1 plus 6.5 hp, filled with fuel and it poured out of carb. hose is fine. anyone see anything like this?

Most likely the float in the carb. is stuck. You will need to take the carb. off, disassemble and clean the carb. The float may be flooded or bound so as not to move or the needle may be stuck which prevents the float from operating properly. When you correct that issue, before you start it you should check your oil for the presence of gas. This problem has been known to fill the crank case with fuel. If you suspect any chance of fuel in oil you should change the oil. After that turn the engine over with the plug disconnected. Goal here is to distribute oil to all the essential parts as the gas acts like a thinner and removes the protective oil layers inside the engine.

Jul 08, 2011 | Craftsman Garden

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I have a craftsman lawn tractor. It will not start. When I put gas in the tank, the gas fills up the carburetor. I just drained the oil, and gas came out along with the oil.

Chances are you have trash in the carb.. the needle/seat and or a stuck float.. the other bit could be a small hole in the diaphragm (if your motor has a vacuum style fuel pump)..

Gas is filling the carb bowel and running right into the intake, past the valves and into the cylinder and down into the crank case.

Many times this will happen after the mower has been transported and bounced around.. causing the float to bounce as well..

The carb should be removed,cleaned and probably rebuilt.. kits are fairly cheap.. and it's a pretty simple job. Adjusting properly once you have it back together will complete the rebuild.

May as well go for a new plug and air filter as well.

Obviously an oil change will be in order.

Many times simple removal.. and a good cleaning will suffice.

Best of luck!

Apr 30, 2011 | Craftsman Garden

2 Answers

Air box and crank case fuel flooding problem happened before, thinking it was stuck or worn float needles; I installed 2 Carb float needles left side facing rear of carbs , all larger main jets, all...

Well there only one way the fuel can get into the crankcase and that's from the fuel tank. The petcock must be draining and the float needles are not stopping the fuel flow. Do you have a prime position on the petcock? If so do not run the bike in the position. Try topping the tank off with gas and letting it sit for a while and see is the gas has gone down and then check the crankcase and see if there's fuel in it again. i still say its got to be your petcock.

Sep 29, 2009 | 2005 kawasaki ZRX 1200 R

2 Answers

Gas in the oil

what engine are you talking about ?
sounds like the floats are stuck in the carb and have flooded the engine, strip and clean the carb (s) out, change the oil and then try to restart bike.

Jun 21, 2009 | 1982 Honda GL 1100 Innerstate Gold Wing

1 Answer

Gas leaking in a stream from other end of primer line

Something is causing the float in the carb to stick in a downward position. This float tells the carb when to cut off the flow, and stuck down it keeps the channel open for gas to flow through. Empty the gas and remove and thoroughly clean out the carb, making sure you hit the float bowl very well. Worst case the float could be bad. If cleaning it thoroughly doesn't get it, consider a carb rebuild kit from the engine manufacturer or replacing the carb.

May 15, 2009 | Mtd Yard - Man 160cc, 21" Self - Propelled...

3 Answers

Poulan 6.75 Lawn mower will not start

Remove spark plug, clean and dry. Replace plug. Remove air filter. Spray WD-40 into carb opening; one second blast. Turn over engine, (pull handle). Engine should start briefly and run for 3 seconds.  If not, you are not getting spark to spark plug. If engine starts, you have a dirty carb and you can buy a rebuild kit from manufacture.

May 02, 2009 | Poulan Pro " Pro" Self Propelled Mower

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