2084 old smokey

[cubs4lifeofme]

120psi and 105 psi. Good power but smokes and runs ruff. Valves ?

 

[cubs4lifeofme]

black smoke, like the choke is on but it is not. plugs get black.

 

[dkirk]

Suggested first things to check. Air filter element may need replacing. Check carburetor float setting. Be sure carb bowl vent passage is open. Fuel pump could be failing and over pressurizing float needle force.

 

[agitch]

My first thoughts are carb float problem and drowning it with fuel. My brother's cv740 kohler was having same problem. It was the carb.

 

[1811Cub]

Whatever you do once you correct the rich condition is change the oil ASAP. The excess fuel will dilute the oil and cause wear or outright failure of the engine.

 

[cubs4lifeofme]

What does the electrical wire going to the carb do ?

 

[gary noblit]

What does the electrical wire going to the carb do ?

It operates a solenoid that allows/disallows fuel to flow

 

[cubs4lifeofme]

Could that have anything to do with it ?

 

[gary noblit]

Could that have anything to do with it ?

very unlikely if your issue is too much fuel...(smoking black)

 

[cubs4lifeofme]

Thoroughly cleaned carb and not much difference... Guess i need to do a comp. test... thinking bent valve ....

 

[1811Cub]

Did you buy a carb kit with all of the gaskets when you cleaned it? These small engine carbs can be a PITA, and some just are beyond help. You may have to locate another carb to fix the rich mixture.

 

[cubs4lifeofme]

No, Just soaked it in Simple Green for a few days then sprayed it with carb cleaner. usually works fine, but not in this case.

 

[mgonitzke]

That's not going to cut it on a Command carb....you need to remove the fuel solenoid, main jet, and that little brass tube with O-rings on it, replace all the O-rings, and make sure all the passageways are clear.

 

[cubs4lifeofme]

Carb kits available

 

[cubs4lifeofme]

Compression is now up to 180 psi in both cylinders cold.

 

[tkhoffman]

Could that have anything to do with it ?

I say No. It is just an automatic shutoff valve. The seat and needle valve should still do it's job in shutting off fuel when float causes needle to rise to seat. A very clogged air cleaner will act like the choke is engaged.
Is choke plate working properly?