Briggs & Stratton 271172, 270962, CE8069 Check Compression, Possible Causes for Poor Compression

4.Turn key switch ON. Meter should display battery voltage.

If meter does not display battery voltage, the problem is with the solenoid wiring, equipment wire harness, or the keyswitch. Repair or replace as required.

3) Check Compression

Use Leakdown Tester #19545 to check the sealing capabilities of the compression components.

Follow the instructions provided with the tester to perform the leakdown test.

NOTE: Any air leaks at the connections or fittings of the tester will affect the accuracy of the test.

Listen for air leaking from the cylinder head gasket, carburetor, exhaust system, and the crankcase breather tube.

•Air flowing between the cylinder and cylinder head indicates that the cylinder head gasket is leaking.

•Air flowing from the carburetor indicates air is leaking past the intake valve and seat.

•Air flowing from the exhaust system indicates air is leaking past the exhaust valve and seat.

•Air flowing from the crankcase breather tube or high oil fill dipstick tube indicates air is leaking past the piston rings.

Possible Causes for Poor Compression:

•Loose cylinder head bolts

•Blown head gasket

•Burned valves, valve seats and/or loose valve seats

•Insufficient tappet clearance

•Warped cylinder head

•Warped valve stems

•Worn bore and/or rings

•Broken connecting rod

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