2-Cycle Snow Engine
Section 2 - Troubleshooting
Page 6
when the engine is running. If the spark looks good in the
tester but the engine misses, try a new spark plug.
Fig. 15
NOTE
: A leak at the cylinder crankcase
mounting surfaces or oil seals can create a lean
fuel mixture resulting in low power or a miss.
Check for leakage at these areas.
Check Carburetion
Before checking carburetion, be sure the fuel tank has
an ample supply of fresh, clean gasoline. Make sure
throttle and choke controls are properly adjusted.
If engine cranks but will not start, remove and inspect the
spark plug.
If plug is wet, look for:
• Over choking
• Water in fuel
• Float needle valve stuck open
• Fouled spark plug
If plug is dry, look for:
• Leaking carburetor mounting gaskets.
• Gummy or dirty carburetor, fuel filter, fuel lines or
fuel tank
• Float needle valve stuck shut
• Plugged fuel cap vent
A simple check to determine if the fuel is getting to the
combustion chamber through the carburetor is to remove
the spark plug and pour a small quantity of fuel
(1 teaspoon or 5 mil.) through the spark plug hole.
Replace the plug. If the engine fires a few times and then
stops, look for the same conditions as for a dry plug.
Check Compression
Connect spark plug wire to long terminal of tester, Tool
#19368
and ground tester to engine with alligator clip.
To check compression, remove the spark plug and install
compression tester
(Figure 16).
Fig. 16
Crank the engine using the rewind starter. Continue
cranking until meter reading stabilizes. The meter
reading should be approximately
115 PSI.
(7.9 bar)
. If
compression is below
80 PSI
(5.5 bar)
, look for:
• Loose cylinder head bolts
• Blown head gasket
• Worn bore and/or rings
• Broken connecting rod
EQUIPMENT AFFECTING ENGINE
OPERATION
Frequently, what appears to be a problem with engine
operation, such as hard starting, vibration, etc., can be
caused by the equipment being powered rather than the
engine itself. Since many varied types of equipment are
powered by Briggs & Stratton engines, it is not possible
to list all of the various conditions that may exist. Listed
are the most common effects of equipment problems,
and what to look for as the most common cause.
WE NEED TO FIND A TESTER!
Summary of Contents for 276535
Page 1: ...2 Cycle Snow Engine 0 2 CYCLE SNOW ENGINE REPAIR MANUAL MANUAL NUMBER 276535...
Page 3: ...2 Cycle Snow Engine ii...
Page 4: ...2 Cycle Snow Engine iii...
Page 14: ...2 Cycle Snow Engine Section 2 Troubleshooting Page 8...
Page 38: ...2 Cycle Snow Engine Section 6 Final Adjustments Specifications Page 32...
