Well it doesn't have a filter at the moment. At some point someone (not me) has removed the filter and replaced the stock fuel line with a solid line. I do not know what the stock fuel line size is but if it has been replaced for example with a larger diameter line I wonder if that could cause it to flood. I am sorta grasping at straws at the moment haha.
Engine Trouble Problem with engine not running correctly
- Thread starter scooter3
- Start date
motorpsycho
Active Member
Ok, does it still have the gas in it that was in it when you bought it?
I think that maybe there's too much oil in the gas.
Drain the gas out of the tank and mix up some fresh gas at a 32:1 gas-oil ratio.
If there's too much oil in the gas it can cause the problems you are describing (low power on occasion and smoking like a frieght train).
If the carb is flooding over, you will have to raise the float level slightly, but I wouldn't mess with it unless gas is literally coming out of the overflow tube from the carb.
The absence of a filter would not cause too much gas to come out of the carb into the engine. The fuel flow into the engine is restricted by the needle and seat in the carb. The carb will only take as much fuel into the bowl as the float will allow. once the bowl is full, the needle & seat closes and no more fuel will flow into the bowl. As the engine is running, and gas is getting sucked out of the carb., the float will go down, which will open the needle ever so slightly to let fuel fill the bowl. As the fuel level in the bowl goes down, the float goes down. When the bowl is full, the float will go back up and close the needle.
if too much gas is getting into the engine, it's either a jetting problem or a stuck float.
The only real contributors to fuel getting into the engine is the main jet (you already checked it)
Unless the person who owned it before you drilled out the jet or put in a bigger jet.
If he drilled out the jet or put in a bigger jet, it could be too rich allowing too much gas and not enough air.
Did you look at the main jet and see if there's a number on it or to see if the hole looked like it had been drilled out?
If the jet has a number on it, chances are it's not the original jet. The original jets in these carbs do not have numbers stamped into them, but most aftermarket ones do.
If the jet looks like it has been drilled out, it's quite possible that he drilled it too big.
At that point you will need to get a stock jet and see how it runs with it in there.
If it's too lean or too rich with a stock jet, then you may have to get some aftermarket jets. Or you could solder the hole closed on the stock jet and re-drill it depending on if it needs to be richer or leaner....it can take a lot of time and it's all trial and error.
I think I have a stock nt jet here somewhere, and if you think you might need it, let me know. Maybe we can work something out depending on where you live.
If you need it i'll give it to you for free.
I think that maybe there's too much oil in the gas.
Drain the gas out of the tank and mix up some fresh gas at a 32:1 gas-oil ratio.
If there's too much oil in the gas it can cause the problems you are describing (low power on occasion and smoking like a frieght train).
If the carb is flooding over, you will have to raise the float level slightly, but I wouldn't mess with it unless gas is literally coming out of the overflow tube from the carb.
The absence of a filter would not cause too much gas to come out of the carb into the engine. The fuel flow into the engine is restricted by the needle and seat in the carb. The carb will only take as much fuel into the bowl as the float will allow. once the bowl is full, the needle & seat closes and no more fuel will flow into the bowl. As the engine is running, and gas is getting sucked out of the carb., the float will go down, which will open the needle ever so slightly to let fuel fill the bowl. As the fuel level in the bowl goes down, the float goes down. When the bowl is full, the float will go back up and close the needle.
if too much gas is getting into the engine, it's either a jetting problem or a stuck float.
The only real contributors to fuel getting into the engine is the main jet (you already checked it)
Unless the person who owned it before you drilled out the jet or put in a bigger jet.
If he drilled out the jet or put in a bigger jet, it could be too rich allowing too much gas and not enough air.
Did you look at the main jet and see if there's a number on it or to see if the hole looked like it had been drilled out?
If the jet has a number on it, chances are it's not the original jet. The original jets in these carbs do not have numbers stamped into them, but most aftermarket ones do.
If the jet looks like it has been drilled out, it's quite possible that he drilled it too big.
At that point you will need to get a stock jet and see how it runs with it in there.
If it's too lean or too rich with a stock jet, then you may have to get some aftermarket jets. Or you could solder the hole closed on the stock jet and re-drill it depending on if it needs to be richer or leaner....it can take a lot of time and it's all trial and error.
I think I have a stock nt jet here somewhere, and if you think you might need it, let me know. Maybe we can work something out depending on where you live.
If you need it i'll give it to you for free.
Last edited:
motorpsycho
Active Member
no, the size of the fuel line will not cause the carb to flood.
it's the float setting that will cause a carb to flood over.
once the bowl is full, the needle & seat will be closed and no more fuel will flow into the carb no matter how big the fuel line is.
I drained the gas out of it after I got it home. I put the gas I use in my other 2 cycle engines which is 50:1 so too much oil isn't the problem. I know its too lean but that shouldn't cause it to flood.
I have no idea if the jet is stock or not. Ill have to check on it tomorrow.
I have no idea if the jet is stock or not. Ill have to check on it tomorrow.
motorpsycho
Active Member
do you have any idea how many miles are on the engine or how old it is?
there's a good chance that the rings are worn out and it may have low compression.
you shoudl do a compression check on it, but i have no idea what a good # for compression on these engines really is.
there's a good chance that the rings are worn out and it may have low compression.
you shoudl do a compression check on it, but i have no idea what a good # for compression on these engines really is.
I don't know but according to RAW's website they have been selling these motors since 06. Every now and then when its not flooding itself it will run right. I'm thinking of just getting a new carb since this one has been fooled with.
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