Tiny Tiger pump function

[duradad 0]

I have a tiny tiger carb that I thought i had disassembled very carefully. I want to replace the diaphragm and need a source. Also, I'm sure this carb has never been apart before,  but I  cant find any sign of the diaphragm "disc" shown on the parts list.  So, I will need this also.  I looked very carefully and can't see how I may have lost it. Any chance that this engine was running fine without the disc ?

 

I don't understand how this carb pumps fuel. The pump carbs that I have worked on usually have a port hole or hose to the crankcase and the diaphragm action is via crank case pressure. Other than the primer valve. What causes the diaphragm pump action while the motor is running ?

Edited Monday at 03:51 AM by duradad
Second question.

[Wallfish 714]

19 hours ago, duradad said:

I have a tiny tiger carb that I thought i had disassembled very carefully. I want to replace the diaphragm and need a source. Also, I'm sure this carb has never been apart before,  but I  cant find any sign of the diaphragm "disc" shown on the parts list.  So, I will need this also.  I looked very carefully and can't see how I may have lost it. Any chance that this engine was running fine without the disc ?

 

I don't understand how this carb pumps fuel. The pump carbs that I have worked on usually have a port hole or hose to the crankcase and the diaphragm action is via crank case pressure. Other than the primer valve. What causes the diaphragm pump action while the motor is running ?

Some had a small disk attached to directly to the diaphragm, some did not but had a larger disk part that covered the entire surface. Maybe post a picture of what you have.

Depending where you're located, I have diaphragms. 

 

The pulse still comes from crank pressure/vacuum. But a 2 stroke uses a reed valve to control it then and it's right through the carb that pulses the diaphragm. 

[duradad 0]

Thanks Wallfish. Here is a pic of my diaphragm and gasket. The rest of the carb appears exactly as in the parts diagram. I don't see any disc attached to the diaphragm.  I checked the thickness. It's about .009 inches, if that helps.

What do you recommend  ? I'm in Connecticut 06804

[Wallfish 714]

I meant a pic of all the carb parts but I can probably find one or make a disk and attach it to a diaphragm for you. That little disk would or should be attached right to the diaphragm. It gives a rigid point for the little arm to contact to pulse it and pump gas. Without it, the diaphragm wouldn't have enough movement to pump enough gas.

PM your address. (The little envelope icon at the top right of any page)

 

Here's a thread I did a while back on a TT restore if you're interested. I also just pined it so it's on the top of the list and easier to find in the future. The TT generators are the most common O&R tool sold

https://myoldmachine.com/topic/1439-tiny-tiger-350-restore/

Do you have this part? Some carbs use this instead of the little disk attached to the diaphragm

 

[duradad 0]

Hi. No. I don't have that part.  I sent a message with my address. 

Thanks.

Bob