Engine Is Hard To Start - Toro AC-1 Service Manual

8
Engine Is Hard To Start
possible
Cause
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Fouled, improperly gapped or broken spark plug
Plugged or waterlogged fuel filter
Improperly adjusted carburetor
Clogged muffler
Faulty primer or primer/fuel lines improperly installed
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Incorrect air gap between flywheel and ignition module
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Faulty ignition module
Plugged spark arrester screen
Rocker arm to valve clearance is out of adjustment
Worn or improperly adjusted carburetor jet needle
Faulty carburetor diaphragm
Faulty fuel pump diaphragm
Low compression
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2-4
1
Remedy
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Clean or replace spark plug;
Replace fuel filter
Adjust carburetor
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set gap to 0.025 inch
(0.635
mm).
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Clean or replace muffler
Correctly install primer/fuel lines or
replace primer
Set ignition module air gap to
0.008-0.01 2 in (0.201
-0.305
mm)
Replace ignition module
Clean or replace spark arrester screen
Adjust rocker arm to valve clearance
Adjust or replace needle
Replace carburetor diaphragm
Replace fuel pump diaphragm
Replace piston rings or cylinder
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