In message <1997Jan14.090203.1666.39581(at)smtp.ecc.com>, "Chris S.
Mottram/AMPAC/ECCI" <Chris.S.Mottram/AMPAC/ECCI(at)ECC.COM> writes
>
> I have a series 5 Alpine and the air valve piston in my strombergs binds
> when I tighten down the top of the carb. I cleaned them pretty well but
> they are not super smooth. Can I polish them and the inside of the carb
> body with something like jewelers rouge or simichrome to improve the
> movement?
> If I play with torque on the 4 bolts holding down the top of the carb, I
> can improve the movement but the top doesn't seat well with the carb body
> (there is a visible gap. Will it run OK like this since the rubber from
> the diaphram may fill irregularities in the way the top seats on the carb
> body?
> How easy should it be to slide the air valve piston up and down? (Yeah I
> know it will be hard to translate text to physical resistance ;-)
>
> Thanks,
> Chris Mottram
>
Chris,
have you tried centralising the needle jet ?
you do this by unscrewing the inner brass screw underneath the carb. I
can dig out the manual and type some notes if you think it may be this.
One part I can reacll is that 'when relaesed, the piston should drop and
hit the bottom with a slap'. I assume the piston return spring is OK.
Also, the diaphragm should have two locating blocks moulded inot the
rubber, one to go in the top of the piston and the other to go into a
slot in the top of the carb body.
If these are not in place, the piston may be rotated out of its normal
position. This may also stop the carburettor top from screwing down
straight.
Hope it helps....
-- Jeff Howarth
This archive was generated by hypermail 2b30 : Tue Sep 05 2000 - 09:32:40 CDT