CARB ; FLOATBOWL " O" RING RENEWAL

{ FAULT }

Restricted flow from the wee plastic fuel feed pipe from the carb floatbowl to the mainjet

{ SOLUTION }

Check the pipe for kinking / flattening ;

Check the end of the pipe where it disappears into the bottom of the floatbowl .

There is a Seal shaped like a sharp edged ” O “ ring in there which sometimes blocks the tube .

For simplicity I will just call it a Seal in the following

If it is not leaking at the brass nut at the bottom of the floatbowl then I would leave well enough alone BUT if you feel competent enough or the problem of not enough petrol to the carb is still there then the following might help .

CARB ; FLOATBOWL ; FEEDPIPE SEAL RENEWAL

Remember to have a fire extinguisher handy when working with petrol

BEST TO REMOVE THE CARB so you can see inside the threaded hole in the bottom of the floatbowl .

{ I WOULD NOT RECOMMEND THE FOLLOWING UNLESS YOU ARE COMPETENT AND HAVE A WEE BIT FINESSE / SAVVY ;

You can still inspect it without removing the carb by removing the passenger side access panel and you will see the brass feed nut . Be aware that petrol will drain from the floatbowl when you do the following

ONLY DO ABOVE INSITU ON A STONE COLD ENGINE }

BEST TO REMOVE THE CARB

Gently grip the outside spring and pull back .

Slacken the nut and you will be able to gently pull it out .

Now this is the part where you need to take great care .

GENTLY pull the nylon pipe out of the hole keeping it inline and do not twist or crush the pipe as you will have to buy a very expensive whole unit .

As you can see from the picture there is the nut , a small washer to compress the Seal , and the Seal itself .

PARTS

The Seal ;

The following photo was copied from minispares.com

http://www.minispares.com/product/Classic/Fuel/Carburetors/Spares/AUD2194.aspx

It is Minispares part number AUD2194

The Washer ;

The following photo was copied from minispares.com

It is Minispares part number AUD2193

Often the Seal remains inside the hole and has to be dug out with a pin .

Take care not to drop the Seal or the small washer .

Inspect the Seal for cuts or crushing and fit a new Seal .

Check inside the hole for little bits of cut Seal and remove as required .

Assembly is the reversal of extraction ; Gently grip the outside spring and pull back , refit the nut , steel washer and new Seal .

Just set the assembly up as in the last pic by keeping pressure on the nut so that the end of the tube goes into the hole first . This should ensure that the Seal stays on the tube .

Again take extreme care not to twist or crush the nylon pipe .

Tighten the nut but do not over tighten { You can Nip it up a little more if there is a slight leak }

Remember to have a fire extinguisher handy when working with petrol

xxxxxxx