Dlolpics

Thanks for reading.

quietnas1

Make sure your not running to lean. Try and richen the hsn by turning it counter clock wise. If you see fuel coming out of the exhaust then your running to rich. Try turning the hsn clock wise to lean it out. Make sure you do your turns in 1/8 increments and then test.

joshreynolds777

My Feedback: (1)

Keep an eye on your temps. If you dont have a temp gun, get one. ($20) They act up around 280 plus. sometimes get hard to start over 300.
temps are fine then Try a new Glow Plug. but like the guy above, Im leaning toward lean and high temps. Look for plenty of blue smoke at high throttle

JoesGT2

i would be looking for a exhaust leak. if , possibly exhaust manifold gasket. it might be fine at idle but at higher rpms it could cause a problem. either way it would start to run lean n give tunning problems.

1QwkSport2.5r

Exhaust pressure is only going to push fuel at higher RPM. At idle, there is very little, if any, muffler pressure forcing fuel into the carb. If you're having a hard time getting fuel to the carb while trying to start the engine, Either the carb is plugged with something (fuel filter installed? dirty?), the idle gap is too small and/or the idle mixture needle is too lean. I suggest first opening the idle mixture needle some and see if the problem goes away. Too narrow of an idle gap will cause the idle mixture to be lean. Opening the idle needle OR opening the idle gap will richen the mixture and allow fuel to come through.

If you can get fuel to the carb and get it started okay, and later on it just dies with no fuel in the feed line to the carburetor, perhaps the tank is cracked or the lid isnt sealing properly. Most often, unless the leak is severe, any leaks in the exhaust system will not effect the pressure to the tank that much. Ask the airplane guys that have aluminum mufflers that bolt on to the engine metal to metal with no gasket! They all weep a little oil while running, with no ill effects on engine operation.

125cchyperman

I doubt it is an exhaust leak as you do not need to run a pressure line form your gas tank to your exhaust at all. Ive been doing that for year, so did adam drake. Just need to run it a little richer thats all. I doubt it's a temp thing, as if was a temp thing it probably would have locked up on you already. Take the glow plug out and look at it. If the plus a white ash color then your way lean. You want it to be a nice golden brown color almost like honey. As others have said you may be running lean, but DO NOT rely on blue smoke as an indicator. As fuels with more oil content tend to smoke more then fuels with less oil content. Also engine temps arent always the best as some engine like to run hotter then others, they all tend to have there own personality. The glow plug is a much better way to tell if your lean or rich. You can (if your experienced enough) listen to the tone of the engine, you can tune yourself in and hear if the engine's running right or not.

Shane