Briggs & Stratton 691159 Cylinder Head

The Briggs & Stratton 691159 Cylinder Head forms the upper combustion chamber for compatible lawn tractor engines. Compression loss, rough running, overheating, or difficult starting can indicate cylinder-head-related concerns.

This part fixes the following issues:

• Engine is difficult to start during normal operation.

• Engine runs unevenly with noticeable combustion.

• Compression remains lower during engine testing.

• Engine temperature rises during lawn tractor operation.

• Combustion output is inconsistent under engine load.

Cylinder head shows compression-related concerns

Quick Check: Compare cylinder compression with the engine specifications.

Fix Suggestion: Address sealing surfaces and cylinder-head components showing abnormal wear.

Prevention Tip: Keep cooling passages clear to support consistent engine temperatures.

Engine operation is rough or uneven

Quick Check: Observe engine behavior at idle and under moderate load.

Fix Suggestion: Review the cylinder-head sealing and related combustion components for flaws.

Prevention Tip: Maintain clean airflow passages around the engine cooling area.

Engine unusually hot during operation

Quick Check: Monitor temperature changes while the engine operates under load.

Fix Suggestion: Clear the restricted cooling areas and correct cylinder-head sealing concerns.

Prevention Tip: Remove accumulated debris from engine cooling passages regularly.

Starting difficult after normal use

Quick Check: Note whether cranking occurs normally before combustion begins.

Fix Suggestion: Evaluate cylinder-head condition when compression readings remain below specification.

Prevention Tip: Follow the engine manufacturer's recommended service intervals and specifications.

Customer Experience: The Briggs & Stratton 691159 Cylinder Head provided a more secure combustion seal and helped eliminate leakage around the cylinder head area.