Hitchcocks Forum

My mono block carb is flooding all the time.
Cleaned and checked operation of float!fouund tip of float needle very soft .
Is this the dreaded ethanol ?
Help please
Jenks

Is it new?

REgards, Mark

it could be the tip!.



could also be a pierced float, incorrect float level, to big a stationary jet, warped body,……

Old formula Viton tip ? http://mykin.com/rubber-chemical-resistance-chart-3
If your carb body is zinc based then it should be drained after use to avoid degradation.

Carb about 15 years old
Can't see how to alter float level
Leaflet says viton tipped
Jenks

Done anything to it recently? Or the fuel system? Do you have a liner in the tank? What is the float made of?

REgards, Mark

Hi Mark,
Only change is additive for ethonal,
Float is plastic
Jenks

I'd skip the Ethanol treatment for a start. It's not necessary for the simple components of our bikes and won't stop the solvents attacking plastics as it's mostly designed to improve storage of Ethanol mix fuels. I have had trouble with Viton tipped needles as well which I cured by going back to an old style nylon one, or brass if you can find one. However, my real issue with the Viton needle is that it was longer than the nylon or brass ones. Worth a try though?

REgards, Mark

The viton tipped float needle fitted in 2000 to replace the well worn nylon item is still ok in the old Monobloc the our A10 sucks through. Still has the original copper float.
I think there would be visible signs if there was a problem with plastic floats, but I could be wrong

Hi junk the amal put on a nice 30 to 32mm mikuni japanese one much better carby and they dont wear out as quick, that and a pod filter and away you go.