Tillotson Carb Adjustment + Coil Ground Wire

[honda02]

I just remounted my GX160 onto a street, all road kart. and I cant get the adjustments down on the carbeurator.
The motor has
-13.5:1 compression
-billet flywheel and conrod
-heavier springs
-some minor porting
-Tillotson 340 carb.
No matter how I turn the mix scres, even to where they are falling out, the engine wont slow down to idle, nor will it accelerate cleanly. I JUST had this motor running on a much bigger kart pulling it hard up to 50 mph. any ideas?

another question. The ground wire that comes from the coil of my engine just hangs there, and the engine still starts. Its only done that of this kart, the other kart had a key. Now I'm trying to hook up a starter switch, but I have to pull the boot every time anyway. Any help is appreciated guys.

 

[KieranM]

Are you sure you bought the right size carb. Also make sure you have no air leaks

 

[Russ2251]

Sure of that Tilly number?
Should be stamped into mounting flange.
Never heard of a model 340.

 

[honda02]

Sorry I just typed that up in a hurry. Ill post the model later, but I know it has a 1 inch I'd. It was working fine till I switched it over, and now it won't perform like it used to.

 

[solomon]

sounds kinda like an air leak, and maybe that coil wire is trying to short on near by metal?

 

[anderkart]

No matter how I turn the mix scres, even to where they are falling out, the engine wont slow down to idle, nor will it accelerate cleanly.



The ground wire that comes from the coil of my engine just hangs there, and the engine still starts.

Those 2 mixture screws aren't usually used to adjust your idle speed, these carbs usually have an additional Idle speed adjustment screw that might just need adjustment. If that's not causing your fast idle problem, maybe your throttle cable is simply adjusted too tight where it clamps onto your carbs bellcrank.

Once you figure out and repair what's really causing your fast idle problem, then you can concentrate on adjusting your 2 mixture screws to make the engine accelerate cleanly.


Its normal for your engine to still run when that wire (that comes from the coil) is not connected to anything. You'd just need to ground it through a kill switch when you want to shut the engine off.

 

[Russ2251]

Engine should not run with mixture screws turned to the point of falling out.

 

[honda02]

Engine should not run with mixture screws turned to the point of falling out.

I know! thats why I'm so confused. I think anderkart may be right about the bellcrank and throttle cable being too tight causing the throttle plate to stick open. Ill see tommorow.

 

[solomon]

yea, a long time ago i reassembled my 8hp briggs carb, and whenever i started the engine it reved full throttle. Checked linkages and everything. Turned out the long main jet, missed its slot and stuck up and kept the butterfly all the way open =P