[Healeys] Fuel Mixture

[Peter & Veronica]

Hi Keith

With unleaded fuel, plug colour isn't the good indicator of mixture it was 
with leaded fuel. If the carb tune is OK (lift the piston 1/32", if engine 
speeds up it's rich, if it wants to stall it's weak, if it speeds up 
momentarily & then settles back it's OK) the don't worry about it.

My advice is give it a good run at speed on the highway eg to  the Pierce's 
this weekend. Better still, let me loose in it at Lakeside again!

Cheers

Peter

-----Original Message----- 
From: Keith Bailey
Sent: Tuesday, October 11, 2011 3:28 PM
To: Healeys at autox.team.net
Subject: [Healeys] Fuel Mixture

    Hi All
            On my BT7 when I do a tune up the plugs always appear sooty
indicating it is running rich
            However when I clean the plugs clean and adjust the points 
Remove
the three air cleaners
            balance the carbs adjust the mixture screw  lift the piston with
raising pin the engine wants to stall.
            The car drive good engine perform as expected. However when on a
trailing throttle down steep hill
            I get a burbling through toe exhaust Which would indicate to me
that the mixture is about right
            But I cannot explain the sooty plugs. The engine does not burn 
or
use oil any suggestions would
            be appreciated