Small Engines (Lawn Mowers, etc.): craftsman blower/vac doesnt start, air leaks, diaphrams

Question
Cleaned and checked carb,but not pulling fuel to the piston for combustion. If I spray carb spray into cylinder it starts till spray is burned off. What is causing this and what to do next . Thanks

Answer
HI DAVID

HAS THIS UNIT BEEN SITTING AROUND LONG ?

IF YOU SPRAY 2 STROKE MIX INTO THE CARBY THROAT WILL IT RUN?

SOUNDS LIKE  COMPRESSION AND SPARK ARE OK

I ASSUME MUFFLER IS NOT BLOCKED AS IS EX PORT ?

PULL CARBY - CHECK DIAPHRAMS AND GASKETS AND FUEL INLET SCREENS
DIAPHRAMS MAY ALL STIFF AND NOT WORKING PROPERLY PARTICULARLY IF UNIT HAS BEEN SITTING A WHILE

TRY A CARBY KIT  IF ITS DODGEY ?

CHECK FUEL FILTER FOR BLOCKAGE/ RESTRICTION  - HOSES FOR HOLES / BREAKS

CHECK BARRELL BOLTS AND CARB GASKET FOR LOOSENESS - LEAKS  

IF ALL SEEMS ALRIGHT HERE AND COMPRESSION  AND SPARK GOOD

THEN MIGHT SUSPECT AN AIR LEAK    - AIR LEAKS LOSE THE CRANKCASE VACCUUM AND CAUSE THE FUEL PUMP NOT TO OPERATE CORRECTLY THUS NOT PULLING FUEL UP FROM TANK TO CYL  

2 STROKES NEED AIR TIGHT C/CASES  TO OPERATE CARBY AND PUMP MIXTURE FROM C/CASE TO CYLINDER


HAVE LOOK AND LET ME KNOW WHAT YOU FIND

CHEERS PAUL HOPE IT HELPS