DG350 lawnmower engine carb

[mikerecike]

Anybody got a link to service manual for valves etc. Also haven't had one of these float bowl carbs apart for years. 3 screws in pic - 2 on top one next to float nut. Guessing one of the top ones must be idle. What are the other 2? No choke currently won't restart after warm. Cheers - any help appreciated

[openspaceman]

1 hour ago, mikerecike said:

Anybody got a link to service manual for valves etc. Also haven't had one of these float bowl carbs apart for years. 3 screws in pic - 2 on top one next to float nut. Guessing one of the top ones must be idle. What are the other 2? No choke currently won't restart after warm. Cheers - any help appreciated

There's no choke because the primer bulb squirts petrol in the intake to richen it. When you press thebulb your finger covers the hole that allows fuel to drain back when running.

 

The screw at the bottom of the float chamber is just a drain.

 

I think the silver screw opens the butterfly to increase tickover revs. The other is probably the slow running mixture.

[mikerecike]

6 hours ago, openspaceman said:

There's no choke because the primer bulb squirts petrol in the intake to richen it. When you press thebulb your finger covers the hole that allows fuel to drain back when running.

 

The screw at the bottom of the float chamber is just a drain.AGREED THANKS

 

I think the silver screw opens the butterfly to increase tickover revs. AGREED THANKS The other is probably the slow running mixture. I TUNED THIS TODAY LIKE A 2 STROKE CHAIN SAW SCREW - FINDING THE MID POINT BETWEEN DYING SCREWED OUT OR IN THEN RICHENED IT UP A HALF TURNISH TI ACCOUNT FOR WOEK UNDER LOAD. HAD NO INSTRUCTION ON THAT JUST GUESS WORK. THANKS FOR YOUR REPLY