Vw Westy '74 Engine turns still after turning offf

[fred1974]

Hi everybody,
I am new to the community my name is
Thorben and our Bus Fred has the
problem that if you turn the hot 2 liter motor with a single Weber carburetor off, it ll still burn fuel while the engine takes a little while to turn off completely. I put seafoam in the tank and changed to 89 Octane Petrol 200 kilometers before. A guy told me that's the best way to get rid of the carbon dust on the pistons .
But it's still a problem..any ideas;)?
Greets Thorben

[magikbus]

The single weber carburetor has always given me trouble. I fought with mine in the last bus I had for 2 years, changing jets, and doing everything I could. I even once had to tear apart the carb to replace the float which had a leak and wasn't shutting off the fuel, but that gave me flooding problems on start up.

My best advice is to make sure there are NO vacuum leaks anywhere, make very sure the points, plugs and rotor are in good shape, and the timing and dwell is right on.

And as a side note don't forget to check the tappets, especially #3 but that doesn't sound like your present problem.

Other than that, I'll leave more advice up to the much more experienced guys on this board than I am.

Stan (Betsy) soon to be on the road.

[stude]

That was me I was that guy check the timing try 94 octane.
Terry

[Volktales]

The usual cause of "run-on", is glowing carbon deposits in the combustion chamber. Engine running too lean and idle speed too high will make this worse. VW used idle circuit shut off solenoids on the original carbs to prevent this common problem in the 1970's. Your single carb will not have this function.

[magikbus]

Thorben, Volktales (Russ) is the guy who has the correct information.
Stan

[stude]

When is the last time it had a tune up with plugs and a oil change maybe try that set timing what oil are we using these days rotella 15-40 and plugs would be ? another can of seafoam some 94 octane put half the seafoam in the oil the other half in the tank see if you could adjust idle and mixture make sure your advance on the distributor is working no vacuum leaks is the motor dirty are the cooling vanes plugged take it to car wash and clean it with the sprayer don't spray the distributor. We will check your work on the 10th see you there.
Terry
www.thesamba.com/vw/forum/viewtopic.php?t=487854
www.thesamba.com/vw/forum/viewtopic.php?t=512661&view=previous
www.vw-resource.com/tune_up.html

[fred1974]

Thanks for all the comments, yes the plugs (NGK)
and rotor had come new and the last oil change
(20w-50) was 2500 miles ago. I will try and see you guys on sunday.
Terry yes it's us see you maybe on the beach at
thursday evening cheers Thorben

[stude]

I will bring a timing light.
T
type2.com/library/electrip/timemark.htm
www.ratwell.com/technical/FindTimingMark.html#mark
www.type2.com/bartnik/timing.htm