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Triumph TR6 - Dirt in Carb Float Chamber. Remove Drain Plug?

I believe that I may have dirt/rust bits in my carb float chamber that intermitently blocks the jet/needle and stops one of the carbs from working. I seem to go from running fine to running on three cylinders once in a while. If I let up on the throttle completely or stop the car for a few minutes it runs fine again until next incident which could be days.

I had a build-up of rust in my fuel filter when I bought the car recently and I've changed the filter but some crud may have made it through if the filter had a break in the element. I realize I may need to drop the tank and have it cleaned and coated at some point soon. However since putting in the new filter there does not seem to be any new rust coming into it.

Before removing carbs and going through a complete clean-up (or having it done) I was wondering if I could just remove the float chamber plugs from underneath and drain them without disturbing anything else. My thought is to drain the float chamber and see if it appears clean or if there are any large bits that come out. Not sure if this even makes a lot of sense since I am just learning about how these carbs work. Any input would be very much appreciated. I know they should be cleaned and serviced but I'd like to see if there's anything other than gas that comes out when I remove the plug.

Thanks in advance for any assitance or suggestions.
Tom Booth

Tom

I would check the bottom of the gas tank for rust that plugs off the gas line. I went through a similar incident with my 68 Spitfire. The filter would plug off but so would the gas line at the tank.

If you haven't removed the gas line that runs to each carb to see if there is blockage there, it may be a good thing to do.

The blockage might be in the float mechanism. While I don't think you would have any problem if you remove the plug to look for particulate- you may not see anything and you may be just as well ahead as to pull the fuel bowl off and inspect the whole float and bowl assembly.

Mike Petryschuk
69 TR6
Michael Petryschuk

Or just as likely there is crud in the needle valve that restricts gas flow into the carb bowl. I'd plan on more than just draining the bowl if the problem keeps up.
Brent B

This thread was discussed between 09/06/2010 and 10/06/2010

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