Pressure loss problem, open to suggestions
So I'm having a problem, I think it is a pressure loss problem. Basically I notice that sometimes (not always, and not all the time) but fuel is not getting to my carb. I don't know how the pressure is being lost. At first I thought it is a leak of some sort anywhere from the exhaust to the tank. But now that I'm thinking about it, to figure this out I took the fuel line off of the carb and started to try and prime the engine and after a few pulls the fuel started spilling out. So maybe there is a clog of some sort in my carb? Only thing that makes me really confused is once I give a little trim (little bit more then when "nothing is wrong" and I'm starting the engine) and the engine gets going there isn't a problem for a while. Only reason why I think it isn't just a priming problem (like I didn't prime the engine when trying to start) is the problem seems to happen while running. I'll just randomly be bashing around and the engine will die. After walking to my buggy and trying to restart It, I feel that there is no fuel in the engine, so I usually check the tank to see if I'm out and most of the time I still have fuel, usually 1/4 or more of a 75cc tank. So I've come to the conclusion the pressure is lost some where and doesn't push the fuel through. I've also died on a few WOT. I doubt I'm running lean, but I guess this might of been that issues. I really doubt it though. This whole problem has only happened around 3 or 4 times total but even once is enough to be a problem. I've just replaced all my fuel lines and I have no kinks or anything. This whole thing leads up to my main question. Can I take apart my exhaust and clean it out. I've only ran about half a gallon through my buggy and I've been running very rich, I'm thinking it might be clogged a little bit, but I'm not sure. I don't see why I couldn't take it apart and clean it logically speaking but everything I see says "TUNED" so I wasn't sure if I could like un-tune it or something? Anyone have anything/advice? Thanks for reading.
Posted on: 1/14/2012 7:57 PM by Author "Dlolpics" in the forum "RC Nitro Stadium Trucks"
http://www.rcuniverse.com/forum/fb.asp?m=10909201

RE: New Engine Installation: Day One
It took me a long time to get my pull start coil back in place, I could coil it up easily but putting it in the groove without uncoiling it sucked. Just takes patiences and time. As for the flywheel "issue" you can do what I did. I just took pliers to the outside edge of it (where the ridges are) and squeezed while undoing the nut. I did mess up some of the grooves but this doesn't effect anything to performance UNLESS you use a starter box. The way starter boxes work is they use the grooves on the flywheel to spin it. I have no intention to ever use a starter box so I didn't care. If you feel the same way then a pair of pliers or a vice would work no problem. only thing else I can suggest is to seal the engine if it's already apart. It should come factory sealed but they are massed produced and might not always be the best. I use ultra copper sealant. Comes in a copperish/tan/orange tube.
Posted on: 1/14/2012 6:52 PM by Author "Dlolpics" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10909136