suzuki dt140 sputtering problem

[bagel]

when I start the motor it will run and cough when I place it in gear it runs but coughs at low rpm but when I put start to go it runs fine. There is not coughing until I slow down and go to Idle or close to it. It eventualy dies. It restarts fine but it continues to cough

 

[JUSTINTIME]

Re: suzuki dt140 sputtering problem

that is called a lean sneeze

 

[yoyo133]

Re: suzuki dt140 sputtering problem

You probably have a piece of trash in one of your idle jets if this problem just started. (brass jet looks like a screw going straight down in the top middle of each carb)...If you have been messing with the carbs maybe it is just an idle air screw out of adj. in which case run them all in gently and back them out 1 turn. This all assumes it is carbureted and not an EFI version.

 

[bagel]

Re: suzuki dt140 sputtering problem

I had the carbs rebuilt not long ago. I will try and adjust the air side as mentioned. The coughing seems to be getting increasingly worse at low speeds. dont notice any coughing when I put the thottle to it.

 

[JUSTINTIME]

Re: suzuki dt140 sputtering problem

carbs rebuilt not to long ago

that does not mean they did it right

 

[James R]

Re: suzuki dt140 sputtering problem

I agree with all the afformentioned conditions. Take a look at the filter on the motor for evidence of contamination and also consider if there may be water in the fuel.Are you using Stabil or similar in your fuel and how old is the fuel you are using. All these things can cause your problem.

 

[bagel]

Re: suzuki dt140 sputtering problem

should I use stabil? Is it a good practice to run stabil through out the year?

 

[Marion Moore]

Re: suzuki dt140 sputtering problem

To eliminate the fuel as a problem, I would suggest running new fuel in a separate tank. From there you can troubleshoot other problems.

Yes, stabilizer all year, just because you typically don't get the usage out of an outboard fuel tank like you do your car. StaBil, StarBrite, even SeaFoam all say they stabilize. I like StarBrite myself. I have used it for over a year and have had good results. I had to empty my 30 gallon onboard tank for an extended down time and no moisture or odd colored fuel. It was all clean and dry.