TheSamba.com :: View topic - Question for those with Weber carbs in Brazil...

Sun Mar 14, 2010 1:39 am

While we in the U.S. still use gasoline, some areas like Hawaii are mandated to have ethanol blended with our gasoline...I'd like to know what kind of modifications do the Weber carbs need to work with 100% ethanol as in Brazil. Some time ago, I read that the insides of the carbs were nickel plated to prevent corrosion. My personal experience after a year of running the 10% ethanol/gas in my Weber carburetors resulted with cracked and brittle rubber o-rings on the idle jet holders. The accelerator pump diaphragms were replaced with genuine Weber parts from Italy, as well as from another source in the U.S. They started out as soft pliable rubber but after 18 months or so, became stiff and developed tiny cracks on the inner surfaces, where the fuel makes contact. They feel like plastic instead of rubber. Do the Brazilian carbs use a special synthetic rubber for the o-rings and diaphragms? Is there a source where these pieces can be ordered from?
Inquiring minds would like to know!
Aloha!
John

Wed Jun 09, 2010 10:39 pm

Dig up the topic....
HAve that the insides of the carbs were nickel plated to prevent corrosion, but nevertheless after some years he have corrosion and release the nickel.
After awhile you have to change the internal parts as you said, there's nothing you can do

Mon Jun 21, 2010 8:30 pm

Thank you for the response. I would think that there is a company interested in producing and marketing ethanol-resistant o-rings and pump diaphragms by this time. They should make a bunch of money too.
Thanks again!
John