Carb Cleaners

[Sea Rider]

Have (12) 250 ml carb cleaner bottles which can treat up to 20 gallons. Regularly pour 1/2 bottle into tank to treat 10 gallons when car is going for extended highway driving, find car returns much smoother than before.

Was wondering if there's an issue if any if it's poured on a premixed tank in same proportion to treat X N? of gallons ? Will the carb experiment any cleaning situation while fuel is passing through thin passages. Have a slight carb hesitation issue, will this product solve this issue as not to strip carb ?

Happy Boating

 

[pvanv]

Re: Carb Cleaners

Luis,

As usual, there isn't any such thing as a "mechanic in a can". That said, some solvents may, over time, help to reduce some varnishing. Chevron techron is one that has been noted by some people to help. Without knowing the makeup of your bottle of "snake oil", there is no way to know whether it would either safe nor effective.

 

[Sea Rider]

Re: Carb Cleaners

Paul,

The product is called Qualitor, it's an inyector & carb cleaner made by Simoniz. If removes carbon build ups on inyector tips, would this product have the same effect removing carbon from piston rings when engine is runing ? Or better use Carbon Guard products frequently sprayed through carb silencer ?

Although my fuel systems are inmaculate clean I'm experimenting 3-4 seconds hesitation from idle while opening throttle up after warming engine or when it has cooled down and at idle to warm it up again. Not an issue passing fast idle to wot.

Have never managed to remove carb's main nozzle out, seems completey stucked inside carb body, if one of it's small holes were a bit clogged do you think it would be the cause for the described hesitation ? When cleaning carb it's done soaking carb in acrylic thinner for 30 minutes and then spraying all it's interior passages including main nozzle with half a bottle of carb spray and rinsing with compressed air.

Happy Boating

 

[SteveMFG_Oxford]

Re: Carb Cleaners

What you describe sounds like corrosion caused by ethanol gas being left in the bowl for a long period with the ethanol/water reacting with the dissimilar metals causing the corrosion. I've seen the same in an old lawn mower.

Removing the carb and soaking the jet area in penetrating oil to remove & clean the jet is the cheapest solution. It's possible that the same corrosion could have occurred elsewhere as well. The many holes inside are tiny in some areas and very easily blocked and NOT easily cleaned. I've seen corrosion actually bubble the metal. If that happened to yours it may not be easily fixed.

Worst case is you may need a new carb. No amount of "wonder juice" can solve those kinds of problems.

If your carb has any totally blocked holes and cleaners don't clear the blockage, it's probably going to need replacement if you want the engine to run properly.

Running the carb dry after use, keeping the gas fresh and using products like Marine StaBil will help to prevent re-occurence.

Good Luck!

 

[pvanv]

Re: Carb Cleaners

Paul,

The product is called Qualitor, it's an inyector & carb cleaner made by Simoniz. If removes carbon build ups on inyector tips, would this product have the same effect removing carbon from piston rings when engine is runing ? Or better use Carbon Guard products frequently sprayed through carb silencer ?

Although my fuel systems are inmaculate clean I'm experimenting 3-4 seconds of hesitation from idle while opening throttle up after warming engine or when it has cooled down and at idle to warm it up again. Not an issue passing fast idle to wot.

Have never managed to remove carb's main nozzle out, seems completey stucked inside carb body, if one of it's small holes were a bit clogged do you think it would be the cause for the described hesitation ? When cleaning carb it's done soaking carb in acrylic thinner for 30 minutes and then spraying all it's interior passages including main nozzle with half a bottle of carb spray and rinsing with compressed air. Happy Boating

It probably won't hurt, but it may not help. A longer warm-up may help. If so, it is likely a lean condition. In that case, it would be worth your while to see whether you can pull the emulsion tube nozzle for more cleaning. Verify plug color. If it's too white, you may want to go a hair richer. Depending on the carb, that may or may not be an easy thing. Be sure you do NOT have high altitude jets installed.

 

[Sea Rider]

Re: Carb Cleaners

Paul,

Been giving a 3 minute warm up to engine as we are in plain summer, will check with 5. Forgot to mention that this small engine power hesitation occurs when at gear and load when passing from idle to fast idle or more, at neutral doesn't have an issue, very strange. Jets are factory standard.

Main nozzle is mission impossible to remove, have tried all things to pull it out and really don't want to break the upper nozzle portion. My plug's color is medium dark chocolate and that horse is delivering 5600 out of max 5800 rpm at wot.

Steve, thanks for your imput but I buy fresh fuel and consume near all of it at each outing, when returning is a must run carb dry, engine starts first pull on next outing.

Happy Boating

 

[pvanv]

Re: Carb Cleaners

Sounds a little lean in idle or transition, probably OK in the power circuit. Transition circuit may have a little varnish somewhere. That's why you don't get the issue in N... no load on the motor. Typical to get it only under load (but you knew that already).

How is the timing? If it's a little late, that could contribute to the stumble. But I don't know what motor you have. Might not be adjustable.

 

[Sea Rider]

Re: Carb Cleaners

Paul,

It's my beloved old 2006 Tohatsu 2 strokes 18 HP. It's still tunned as factory delivered.

Bingo, after adjusting 100 rpm more on the idle side, runing the engine at 3/4 throttle + some extended wot for 1 hour including pouring an overdose of the Qualitor carb cleaner in the tank's pre mix has made the hesitation issue dissapear, really works well, engine runs smooth and with instant punch. If having still some throttle hesitations problems after cleaning well inside of carb, consider using auto carb cleaners...

Happy Boating

 

[pvanv]

Re: Carb Cleaners

Glad you got it dialed in!