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Carb help

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Spriteman65

Spriteman65

Senior Member
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I have an annoying fuel smell coming from the front of my car. 1965 Sprite with the stock HS2 SU carbs. It was doing this when I bought the car. I rebuilt the carbs (first time rebuilding an SU). It is not leaking from anywhere that I can see. When I was adjusting the carbs, it did squirt fuel out the intake side of the front carb one time as I blipped the throttle. Any ideas where to start? Do I just have the carbs adjusted to rich?

Thanks
Jeff
 
Check your float setting in the fuel bowl. You might have it set too high.
 
I was getting a fuel smell till I got the correct oil in the damper
 
Thanks to both of you. I will re-check the float level in both carbs and see if that helps. I am using the oil that Moss sells for the carbs. Is that the correct oil or should I be using 20W-50?
 
Mark had me use ATF
 
I think they're basically the same
 
So long as there is oil in the dashpots it really doesn't matter to us "street drivers", the racers like something lighter but it makes the carbs "bog" some in normal driving. If you use what you use for the engine it will minimize the "bog"
BillM
 
ATF for me too in Blighty. In a single HIF44
 
Most racers don't use any oil in the dashpots, maybe a squirt of spray lube to have some lubrication in there going on, we do this for quick piston movement. On street car, oil in the dashpot is used to control piston rise speed, in most case you want to slow down the piston rise rate, if the piston rises too quickly you can get a on-throttle bog for a too rich, too quickly condition, and normally a thicker oil slowing down the piston rise will take care of this, on the race car, once they get them moving there is no starting and stopping like there is with a street car, so this is not issue with them.
 
Still having issues. I was at the ABFM yesterday and Bill Loeb helped me find my leak. It is leaking between the heatshield and the intake manifold. Pulled everything off this morning and found all of the gaskets (from both carbs) wet and smelling like gas. I was expecting them to be dry. Is this normal? If not, is this floats set to high or leaking neddle jets into the float bowls? I have the grose jets installed if that makes a difference.

Thanks
Jeff
 
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