WD missing at idle

[Brennon Raser]

My 53 wd runs real choppy at idle. New plugs and wires. Cleaned all the contacts under the dist cap. Removed the air cleaner and cleaned everything, added new oil to the cup. I also removed the gas tank and cleaned the inside with grit, removing all the rust and other crud in there. Also removed the carb and soaked and cleaned it. Under load when pushing snow it runs great when the gov kicks in, no missing, it will push all day long. Any suggestions or is the popping and crackling somewhat normal? Thanks.
 

[old]

If your talking a low slow as in 500RPM guesstimate type speed yes pretty normal due to the lack of fuel and the low RPM. You might be able to improve on it some by adjusting the idle mixture screw. Remember that screw works back wards of the main jet so out is richer in is leaner
 

[Brennon Raser]

Thanks Old, I will play with that a little. I have not tried that yet.
 

[old]

Remember that idle adjustment screw if close to the top of the carb where it bolts to the manifold. Many say screw it in all the way to bottom but not super tight and then back it out 1-1/2 turns and then leave it. That is pretty much how I do it but I almost never run my machines at a low speed idle
 

[BushogPapa]

Actually, it should idle perfect..but there could be wear anywhere in the Governor, Mag or Dist shaft systems..linkages, etc that would lead to that..
Even worn Valve-Guides...
Are you sure the timing is not Advanced..??
On my WD-45, there is a "Surge Spring" attached behind the carburetor..

Maybe yours needs one..?

Ron..

AC's generally run pretty "Sweet", if all is well..
 

[Leon RCMo]

Inside the carb. there is a thin metal riser between the bottom half and top half of the carb.
they have a thin lip that fits between the two halves, with your plyers bend the lip out a little all the way around. Keeps the vacuum steady at low RPM.
 

[Brennon Raser]

Thanks for all the info.
 

[old]

The correct term for that is the venturi. You have to be careful when doing any thing to that part or you can end up buy a new one
 

[Will Herring]

I had idling problems on my WD and it turned out the sediment bowl screen was partially clogged. Soaked it, let it dry in the sun, re-installed, and cleaned the carb inlet and it ran fine after that...

Sounds like you may be beyond that one, though.
 

[Tom in Berrien Springs MI]

Had an old WC that blubbered at idle speed. A veteran AC mechanic told me to increase the spark plub gab to .040 - the engine now idles perfectly.
 

[Brennon Raser]

After 2 good snowfalls up her this is what I found. After start up it was running real rough. Cleaned out the sediment bowl and let some gas run out of the carb bowl and it ran perfect. 1 week later it was running bad again, it would die under load. Cleaned out the sediment bowl again and let some gas out the carb float bowl and I pushed snow for 2 1/2 hours with barely a miss. Glad it was something simple, this time. Thanks for all your help.
 

[Brennon Raser]

After 2 good snowfalls up her this is what I found. After start up it was running real rough. Cleaned out the sediment bowl and let some gas run out of the carb bowl and it ran perfect. 1 week later it was running bad again, it would die under load. Cleaned out the sediment bowl again and let some gas out the carb float bowl and I pushed snow for 2 1/2 hours with barely a miss. Glad it was something simple, this time. Thanks for all your help.