Fuel system cleaners, do thet work, are they safe.

[jurgenscraft]

Fuel system cleaners, do thet work, are they safe.

Good morning gentlle men,well it is morning here in South Africa.Last evening,John, a fisherman friend and I had just finished assembling the carburettors on a 55 Yamaha two stroke ,John commented on the amount of gunk we found in the carburettors,probably the motor was not run dry after it's last outing,then the subject of fuel treatments came up,here in south africa WYNNS oil is very well represented,one of the products they offer is a fuel system cleaner, by then a few more boaters had joined in the bench boating,questions were fast and furious,about what effects this product would have on a boat motor,concencous was reached on this theory. Mix the fuel system conditioner with the petrol first<br />and then mix the combination of petrol and fuel system conditioner with the correct ratio of two stroke oil and the run the motor as per usual. Has anybody on this forum done this or something simillar, and does this help to keep the carburettors clean,I have my doubts,surely it is the two stroke oil that remains behind in the carburettor bowl after the petrol has evaporated that causes the gunk ,so you would still have to run the carburettors dry,Kind Regards William Wright.

 

[rodbolt]

Re: Fuel system cleaners, do thet work, are they safe.

Re: Fuel system cleaners, do thet work, are they safe.

best to drain the carbs usuing the carb drains, when ya run it dry you also run it out of oil for the internal shiney parts. fuel system cleaners are mostly snake oil and mostly bad sometimes very bad for the rubber parts of the fuel system. that gunk is the solids from both the oil and the gasoline after the lighter stuff has evaporated. even if you run the engine till it quits you will still have enough gas in the bowl to gunk it up. if your going to let it sit then manually drain them. I hope ya did the fuel pump at the same time. often the same gunk is in it as well. once running that gunk ends up clogging the jets in the carbs and it starts running poorly again.

 

[imported_Curmudgeon]

Re: Fuel system cleaners, do thet work, are they safe.

Re: Fuel system cleaners, do thet work, are they safe.

I had to have carbs rebuilt 3 times in three years ... started using STABL religiously and haven't had a burp in 3 more years; use pattern didn't change much. It may be snake oil, but it works.