Is it a petrol screw or air screw carb ? Your wasting your time if its an air screw. (from personal experience)

b40rt,

It's an air screw. I'm lost here

Does anyone have a diagram of the PBHB 26 carb?

I can't locate this second pilot jet.

I believe, (not sure) the previous poster are reffering to this little item, that is located inside:

 

(at the photo it is the jet on the top:
 

 

The parts diagram is here, but be very careful by reading, as then PHBH can be fittet in many different ways;

- with air screw or with fuel mixture screw,

- with the idle jet inside (as shown above) and sits at the top towards the carb bore or with the 5mm idle Jet that's located at the bottom,

- also different chokes, bowls, ...

 

http://www.thisoldtractor.com/mg_images/dellorto_carb_diagram_phbh_page_1.jpg

 

 

 

Edited May 6, 201610 yr by pschrauber

b40rt,

It's an air screw. I'm lost here

Fuel screw is nearest cylinder/inlet, air screw is nearest air filter. The air screw carb can be a pain in the ass.

b40rt,

That makes it a pain in the ass then.

Well, it's just interesting.

Pulled the disc valve apart tonight and oh dear, oh deary me!

Poof!

Er....pardon?

I'm thinking, well it's knackered anyway so I might as well try a chemical metal, dremel and a rubbing block. Nothing to lose really?

Any ideas?

You might get a donor engine case in any case a new disc.

I wouldn't try using knead metal JB-weld or similar stuff as through vibration a part of the repaired spots can get loose and the output would be similar to what you have now.

Engines do show up here and there ask the community here look at LeBonCoin in France, Kiiji and Subito in Italy. (Had a likewise problem with my TR so needed too the basement which I found for good price in Italy).

Where are you ?

I'm in Cumbria b40rt

I may as well give it a try pschrauber before I try to buy new cases.

Could be interesting?

Defiantly have some climber cases, will check condition if your interested ? I'm in Edinburgh.

Yeah man, have a look.

Cheers