condensation

Anything related to Lambrettas... ask tech questions, post helpful info, or just read and learn.
Twinny
registered user
Posts: 73
Joined: Sat Jan 08, 2011 7:32 pm
Main scooter: suzuki 185
Contact:

never seen it before ,condensation on outside of carb after a few miles ,whats the cause ?
cheers john
warts
registered user
Posts: 7092
Joined: Thu Aug 04, 2011 6:28 am
Main scooter: honda
Location: Fenland
Contact:

To show the carb is working properly.
As fuel is drawn through the atomiser and carburettor, a certain amount will evaporate (the rest remaining tiny droplets).
The change of state from liquid to gas requires quite a bit of heat energy. This comes from, among other places, the carb body. As the carb will now be cooler, any humidity around will condense into water droplets. Et viola!
You see this loads on calor gas cylinders, same thing - liquid changing to gas.
I'm sure someone will come along and get all that into far fewer words.
Knowledge
Dealer
Posts: 957
Joined: Sun Jan 11, 2009 12:49 am
Main scooter: GP
Location: Ipswich
Contact:

Do you remember that lesson at school on latent heat, and you didn't understand it?

Well, you do now.
Martin
User avatar
ArmandTanzarian
registered user
Posts: 1103
Joined: Wed Jan 07, 2009 6:26 pm
Location: Kent
Contact:

If the evaporating fuel cools the damp air too much, ice crystals can form and block jets. I had a Kawasaki that on mornings with frost and fog would struggle to run after 20 miles or so. Carbs on later models were fitted with little electric heaters to stop it happening.
Meus Lambretta est non infractus. Is est quietus.
Twinny
registered user
Posts: 73
Joined: Sat Jan 08, 2011 7:32 pm
Main scooter: suzuki 185
Contact:

Knowledge wrote:Do you remember that lesson at school on latent heat, and you didn't understand it?

Well, you do now.
you cant tell me you can remember that far back martin :D
Post Reply Previous topicNext topic
  • Information
  • Who is online

    Users browsing this forum: Ahrefs [Bot] and 58 guests