Caruretor

[Ray]

Re: Caruretor

OK its not leaking any gas but why would my engine be running so rich then? When I took the engine down it was running excellent with exception to a few oil leaks now every plug is black, not oil black but soot black that tells me it is running rich. Could there be any other reason other than the seat is not woking well.

[NY86]

Re: Caruretor

The mixture on these really only work above 5,000 feet.

I hear this all the time, but it's bit misleading. The mixture works fine at any altitude, but the carb is reasonably self compensating, so there is no improvement available from the mixture control until you get to about 5000 ft density altitude.

[cvavon]

Re: Caruretor

RAY AS MARTY has said the carbs are about fool proof if you don't have fuel running out all over then the float is working my guess is some one has tried to make it a carb for a 75 hp or larger and put in a larger venturi or main jet the main jet is the first place i would look and don't trust the number stamped on the jet as they are easy to drill check it with a number drill bit that is the size that it's suppose to be the venturi is 1 1/4 in for a 65 and the jet is .49 don't mess with the float if it is working as Marty said they are a real pain if you have any more questions call me 931 306 9484 chuck

[M Towsley]

Re: Caruretor

Ray,

The problem you run into is sometimes the carb you have may not be for the 65 hp engine as someone over the years may have changed the jets and venturi. You really don't know until you take it apart. It you think it is just the float level, this can be very time consuming and aggravating to do....especially if you have never done it before. I have set the float level on four or five of these little carbs and it is super time consuming to do. Plus, you really have to have the parts and tools and bench setup to do it right. I would highly recommend sending it away and having it done professionally. You can do a search on here to find someone who does it, a buddy of mine just had his done as we found the carb was setup for a completely different Continental engine. There is a guy in the Chicago area who does it but his pricing is astronomical for the rebuild. The one my friend had done was sent out to maybe California. I will try and remember to check with him.

Oh, and a couple of other things. The mixture on these really only work above 5,000 feet. It is not like the normal mixture you would be used to on other planes. Once you get the carb setup to run, they are good little carburetors that, for me, never give me a problem again.

Update, this is the guy:

Kevin Peterson
KPS Airmotive
26524 Ruether #613
Santa Clarita, CA 91350
661 492-3234

[Ray]

Ok guys I need some more help, after a 2 year restotation the plane is flying and flying well with exception to the engine which is also running well however my plugs are sooting up, all of them. The current carb is a stromberg S3B with no leaning option. I have been told there is a better stromberg carburator and was wondering if anyone had an extra one for sale or the numbers needed to get a rebuilt one. Not sure what the cross reference number is so any help would be appriciated. I was told the problem is the seat on the float needle delivering a little extra fuel. I have priced this out with gaskets and its about 150.00 and with what I have been told about the problems with this carb is it worth buying a newer stromberg? Thanks