[TR] TR 250 carb woes

[Bud Rolofson]

Steve,

You've gotten lots of good advise on the cause and I agree.

Here's how I deal with clogged fuel needle valves.  First get used to  
taking off the bottom half of the fuel chamber bowls with the carbs  
still on.  You'll get better and better at it...I did after about the  
first 10-15 times.  With them off pour the fuel into a white plastic  
bowl to see what you've got clogging the needle valves.  You can then  
start figuring out what part of the fuel system to replace first.  I  
started with lining the tank with an Eastwood kit and progressed  
through all the fuel hoses and lines all the way to the carbs.  Got a  
lot of experience cleaning those fuel bowls in the process of finding  
out "did they stay clean this time?" .   I even put in temporary extra  
fuel filters (2 with extra hoses) between the fuel pump and carbs to  
get the specs out that kept reappearing in the bowls.  It finally work  
most of it (pretty sure it was varnish since the specs crumbled into  
particles that looked like varnish) got cleared out of the system but  
to this day I still make sure to clean the bowls before going on a  
long trip...just part of the routine stuff now that I can whip them  
suckers on and off in a half hour.  Never fails to make it run smoother.

Bud Rolofson

71TR6 CC57365 (Good 6)
66TR4A CTC57806 (The Wreck-Almost parts)
66TR4A CTC57529 (The Project)
71F-250 Camper Special (Triumph Support Vehicle)
Z-50A Hardly Davidson 1977 Honda Mini-Trail Bike (Triumph Pit Bike)
levilevi at comcast.net




On Apr 15, 2010, at 8:19 AM, Steve Thornton wrote:

> List-
>
>
> I need your collective help.
>
> I have a relatively new restoration of a TR 250 and the carbs were
> rebuilt in the Summer of 2008. Since then, the car has run relatively
> care free.
>
> However, after a few month lay off, I tried driving it in March,  
> only to
> smell a strong gas smell once started. I left the car running, popped
> the hood and determined gas was pouring out of the float bowl of the
> rear carburetor.
>
> Last night, a friend and I tore down the carbs and found a small  
> amount
> of dirt in the rear carb, installed Grose jets in both reassembled  
> them
> and the same thing occurred in the rear carb only. We then removed the
> carbs, inspected both and adjusted the float to 11/16ths as the  
> rebuild
> kit suggested. Same result. We are baffled about why the rear carb is
> overflowing gas from the rear carburetor. Any ideas of what we do  
> next?
>
> Many thanks in advance.
>
>
> Steve Thornton
> Bowling Green, KY
>
> 1963 Jaguar Mk II RHD
> 1968 Triumph TR 250
> 1963 Harley Davidson Topper
> 2000 Indian Chief
> 2007 Harley Davidson Heritage Springer Classic
>
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