GoldenEagleChris
Member
I have been scouring this site for a similar scenario to my issue, but I havent been able to find any help.....
I have just tried to fire up my rebuilt Zenoah "Strato Charged" 25.4cc engine.
Much to my dissapointment, nothing happened.
So, I put on my mechanix hat.
I checked for spark....I turned off all the lights and pulled.....ewww I got shocked!!! Blue lightning in the dark!!!! ---I got spark....
Compressions seems normal....nothing feels weird when I yank on the pull start.
I got a Hi Po Carb Walboro 167a that i have had for the past several years and i have ALWAYS been happy with its reliability and performance... i pulled apart and carefully sprayed down with no residue brake cleaner and put back together exactly as it was. It seemed to have a vaccuum and pulled up gas through the lines into the carb....primer bubble filled up........half way....
Before i rebuilt it, that primer bubble always got full.... Flag #1
I kept pulling....
Now all the gaskets are brand new with Indian Head Gasket Seal coating everything.......so I am almost positive it is NOT an air leak....
I put my nose in the exhaust can.....smelt like virgin exhaust....Flag #2
I put my nose in the spark plug hole....smelt like an absolutely clean cylinder,
spark plug tip is dry. No Gas.....Flag #3
I even put my nose in the venturi on the carb and it too, smelt clean.
But the primer bubble is getting gas......
Dammit.....
I prime the **** out of the bubble, I watch gas go up the line, into the bubble, i stop priming, i watch the gas leave the carb area and go down into the gas tank....I dont remember that happening either...
I twist the throttle and pull and i can hear a change in tone from a closed put to a wide open throttle pull. I still smell no gas in the carb.....
SO I THINK ITS THE CARB not delivering fuel to the cylinder....
Shoot....
What now...?
I have a carb rebuild kit i got, but it seems to have WAY more pieces to it than my carb did when i cleaned her out....maybe I didn't go deep enough in the carb but it looks like it can get intense.
(All i did with the carb when i cleaned it was pull off the primer bubble, removed the gasket, it looked fine, everything appeared to function normally, no gunk no residues no nothing, it looked fine...I flipped the carb over and removed that one screw, took off that gasket and everything on that side looked fine, sprayed that solvent and put it back together.....pulled out the hi and low and idle screws, sprayed in there put them back.....so i pretty much cleaned out the carb...(
Can anyone lays some motored biking knowledge on me and let me know what you think?
Here are some quick pics to give you an idea what I am working with....
I have just tried to fire up my rebuilt Zenoah "Strato Charged" 25.4cc engine.
Much to my dissapointment, nothing happened.
So, I put on my mechanix hat.
I checked for spark....I turned off all the lights and pulled.....ewww I got shocked!!! Blue lightning in the dark!!!! ---I got spark....
Compressions seems normal....nothing feels weird when I yank on the pull start.
I got a Hi Po Carb Walboro 167a that i have had for the past several years and i have ALWAYS been happy with its reliability and performance... i pulled apart and carefully sprayed down with no residue brake cleaner and put back together exactly as it was. It seemed to have a vaccuum and pulled up gas through the lines into the carb....primer bubble filled up........half way....
Before i rebuilt it, that primer bubble always got full.... Flag #1
I kept pulling....
Now all the gaskets are brand new with Indian Head Gasket Seal coating everything.......so I am almost positive it is NOT an air leak....
I put my nose in the exhaust can.....smelt like virgin exhaust....Flag #2
I put my nose in the spark plug hole....smelt like an absolutely clean cylinder,
spark plug tip is dry. No Gas.....Flag #3
I even put my nose in the venturi on the carb and it too, smelt clean.
But the primer bubble is getting gas......
Dammit.....
I prime the **** out of the bubble, I watch gas go up the line, into the bubble, i stop priming, i watch the gas leave the carb area and go down into the gas tank....I dont remember that happening either...
I twist the throttle and pull and i can hear a change in tone from a closed put to a wide open throttle pull. I still smell no gas in the carb.....
SO I THINK ITS THE CARB not delivering fuel to the cylinder....
Shoot....
What now...?
I have a carb rebuild kit i got, but it seems to have WAY more pieces to it than my carb did when i cleaned her out....maybe I didn't go deep enough in the carb but it looks like it can get intense.
(All i did with the carb when i cleaned it was pull off the primer bubble, removed the gasket, it looked fine, everything appeared to function normally, no gunk no residues no nothing, it looked fine...I flipped the carb over and removed that one screw, took off that gasket and everything on that side looked fine, sprayed that solvent and put it back together.....pulled out the hi and low and idle screws, sprayed in there put them back.....so i pretty much cleaned out the carb...(
Can anyone lays some motored biking knowledge on me and let me know what you think?
Here are some quick pics to give you an idea what I am working with....