Help Me .....Im Flooded

[leadfarmer]

I got a echo 510evl given to me in none running state. Carb is a walbro HDA 20b. Cleaned carb and installed new kit took it out side and severely flooded after 6 pulls. took carb back off to see what i put in wrong ,didnt find anything but it didnt hold air when i blew air in fuel inlet so i put old needle back in and that seemed to work.so back out for round 2 and same thing. Take carb off again and decided to learn how to pressure check a carb with Mrs Googles help. well after putting pressure to fuel inlet with my ebay special vac and pressure pump it just passed the air out impulse tube......What do i have wrong fellas

 

[idiotwithasaw]

Um... is it a new kit? Also pics would help, is the impulse in the top cover or on the side of the carb?

 

[Simondo]

Be sure the metering arm hight is right...the gaskets and diaphragm's are the right way round and in the correct order !

 

[merc_man]

I had the same thing. I put the wrong fuel pump gasket in out of the kit. The one had a open spot and other one never.

 

[Guido Salvage]

When I saw the title I thought you were rained out in West Virginia. Nothing further to add on your dilemma beyond what has been said other than to check the screws if the carb is adjustable.

 

[Stump Shot]

Take a look at this, has exploded view of the HDA, might help ya.

 

[Redfin]

Op has vanished just like his pop off pressure

 

[Chainsaw Jim]

Op has vanished just like his pop off pressure

Hopefully he isn't busy putting out a fire.

 

[leadfarmer]

All right boys I got busy this afternoon and couldn't check my post . eatin a little supper then check your suggestions. I'll let u know what I find

 

[panteliss]

I got a echo 510evl given to me in none running state. Carb is a walbro HDA 20b. Cleaned carb and installed new kit took it out side and severely flooded after 6 pulls. took carb back off to see what i put in wrong ,didnt find anything but it didnt hold air when i blew air in fuel inlet so i put old needle back in and that seemed to work.so back out for round 2 and same thing. Take carb off again and decided to learn how to pressure check a carb with Mrs Googles help. well after putting pressure to fuel inlet with my ebay special vac and pressure pump it just passed the air out impulse tube......What do i have wrong fellas

You .......... flooded because something wrong on the metering side of carb , the needle arm or the needle , conect your pump unscrew the cover ( metering side ) and give some pumps see if the guage of your pump hold if hold the carb needle is ok
then put the mebrans and the cover and pump again if now dont hold pressure the needle arm is very high ( the mebrans and cover push the needle arm down )
Or for the unknown reason sometimes the needle stuck in its base and the saw flooded

for the pump side of carb the mebran maybe is not good , the gasket sometimes dont fit , you have put them wrong , for more accuracy tests put the carb in the water and see from where you have bubbles then concandrate to this point

good luck

 

[leadfarmer]

fuel is black ell

 

[leadfarmer]

mabe found problem. I think this is the old one and it definitely different

 

[leadfarmer]

I think I'm on to somthin here. The kit must had the wrong diaphragm in it, just to dumb to notice. Sorry fellows fer wasting your time. I'll put it back on and reply back. Thanks

 

[merc_man]

Thats the exact same thing i did. Grabbed the open looking fuel pump gasket instead of the more sollid one.

 

[panteliss]

I think I'm on to somthin here. The kit must had the wrong diaphragm in it, just to dumb to notice. Sorry fellows fer wasting your time. I'll put it back on and reply back. Thanks

can you a beter photo of your presuure-vacuum pump??
thanks

 

[leadfarmer]

can you a beter photo of your presuure-vacuum pump??
thanks

Shorty .

 

[Simondo]

In case this throws any light. Walbro HDA .... full=K 22....partial kit =D 10.
HD kits are not totally right for a HDA carb if memory serves.
Edit: That HDA 20 seems to need a more unusual kit....just looked up the kit and it comes out at K12-HDA and D11-HDA

 

[leadfarmer]

here's my fleebay pressure and vacuum device

 

[leadfarmer]

Well it runs now but revs pretty high my guess is seal are dried out can't even keep it idling long enough to really do any adjusting. I started with 1 turn out on each screw. Thanks every body for teaching school today. [emoji106]

 

[TJ the Chainsaw Mechanic]

Try 1.5 turns on the low. I've found using WD-40 on the gaskets helps them seal better.