TO-30 No Start

redhorseshoe

New User
I checked the archives and found some similar threads but not quite what I was looking for. That being said, here's the deal. . .
I just had my z129 engine completely overhauled by a local machine shop. I rebuilt the carburetor myself using a comprehensive kit from the YT store. I put it all together today and have good, bright blue spark and plenty of fuel getting into the carb bowl, but not into the cylinders. I'm just not real sure what the problem could be other than maybe I didn't choke/crank on it long enough but it seems like it should have at least sputtered with all the cranking I did. The carb shouldn't be a problem it was submerged in dip type carb cleaner for weeks(I kinda forgot about it after I put it in there) then eveything was replaced. Any Ideas for where to start would be appreciated.

Thanks
 
Pull the air cleaner air intake tube off and while cranking put your hand over the air intake of the carb. You should feel a good suction there and also get gas on your hand when you do that. Poor suction or no gas means you have a problem with either low compression form a rebuild not prelubed to a carb problem. But on the other hand it may even try to start when you do that
 

When you crank a motor with an updraft carb for just a few seconds, if it is getting enough gas, and it doesn't start, gas should run right out of the carburetor.
 
Update: Cranked on it this morning with the choke the entire time. Gas is definitely getting to the cylinders now. I readjusted the timing which was off a bit but now I have no spark. I'm at a loss here as to where to go next. I had spark when timing was off but now that it's adjusted, there's no spark but there is fuel. Thanks for the replies so far.
 
(quoted from post at 10:55:18 06/11/17) Update: Cranked on it this morning with the choke the entire time. Gas is definitely getting to the cylinders now. I readjusted the timing which was off a bit but now I have no spark. I'm at a loss here as to where to go next. I had spark when timing was off but now that it's adjusted, there's no spark but there is fuel. Thanks for the replies so far.

How did you ascertain that you have gas to the cylinders?
 
How do you know you have gas in the cylinders?? If the plugs are wet and that is how you know you have gas then guess what the reason you do not have spark at the plug is there gas fouled.

But if your not getting spark at the plug wires then double check your points and make sure there clean and with the ignition on open and close the points by hand. When you open them by hand you should both see and hear a spark
 
Pull the carb drain plug and make sure you have a good steady flow of gas that will fill a pint jar in under 3 minutes and yes catch the gas to look for water/dirt etc.
 
re you sure you have the distributor timed right? It"s a four stroke so it fires on every other revolution of the crank shaft. It"s possible to be 180? out of time. Make ure the #1 cylinder is on the compression stroke then line up the timing mark. Do you have the firing order correct(1-3-4-2) and the points set correctly (0.22)?
 
Thanks for all the help so far. Well I've got it running now, starts right up, throttle's responsive, etc. However, it won't run without the choke on about 90%. The fuel line is clear and flowing good, I've readjusted the float, re torqued the manifold bolts, I can't figure out what's going on. Adjusting the idle and main jet screws has no effect unless you tighten them, then the engine will die (obviously). Any ideas would be appreciated.
 
(quoted from post at 21:18:36 06/16/17) Thanks for all the help so far. Well I've got it running now, starts right up, throttle's responsive, etc. However, it won't run without the choke on about 90%. The fuel line is clear and flowing good, I've readjusted the float, re torqued the manifold bolts, I can't figure out what's going on. Adjusting the idle and main jet screws has no effect unless you tighten them, then the engine will die (obviously). Any ideas would be appreciated.

How do you know that fuel is "flowing good". Would you please define "flowing good"
 
(quoted from post at 21:18:36 06/16/17) Thanks for all the help so far. Well I've got it running now, starts right up, throttle's responsive, etc. However, it won't run without the choke on about 90%. The fuel line is clear and flowing good, I've readjusted the float, re torqued the manifold bolts, I can't figure out what's going on. Adjusting the idle and main jet screws has no effect unless you tighten them, then the engine will die (obviously). Any ideas would be appreciated.

How do you know that fuel is "flowing good". Would you please define "flowing good"
 
[/quote]

Well, I can't quite give you exact GPM or anything but if I pull the fuel line from the carb, fuel pours out I think as fast as 1/4" fuel line will let it. Same thing when I unscrew the plug on the carb bowl. It's just a fast flowing steady stream of fuel.

I've squirted carb cleaner through the main and idle jets and it seems to be getting through okay but I'm assuming there must be a blockage in there somewhere.
 
(quoted from post at 12:52:24 06/17/17)
ow do you know that fuel is "flowing good". Would you please define "flowing good"[/quote]

How long did you let the fast flowing stream run from the drain?
 
Fuel flow out of the carb drain plug need to fill a pint jar in under 3 minutes to be good enough to run. As for spraying carb cleaner threw the jets that is not good enough you need to blow them out with air and also poke them out with a small wire or like I do I use a torch tip cleaner tool. Carb cleaner does not remove small pieces of dirt and rust that a wire will
 

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