BRIGGS & STRATTON 795858 Engine Piston Assembly

The BRIGGS & STRATTON 795858 Engine Piston Assembly supports efficient combustion and power delivery inside lawn mower engines. Piston wear can cause compression loss and reduced engine performance.

This part addresses the following symptoms:

• Low engine compression during operation.

• Excessive engine oil consumption.

• Loss of engine power output.

• Blue exhaust smoke appears.

• Internal engine knocking noise.

Low Engine Compression

Quick Check: Measure cylinder compression before starting engine under normal operating conditions.

Fix Suggestion: Inspect the piston and rings for wear or damage and verify proper installation to maintain cylinder compression.

Prevention Tip: Maintain clean engine oil reducing piston wear during extended equipment operation.

Excessive Oil Consumption

Quick Check: Monitor engine oil level after each completed mowing session careful.

Fix Suggestion: Check piston rings and cylinder condition to reduce oil leakage into the combustion chamber.

Prevention Tip: Follow scheduled maintenance keeping lubrication system operating efficiently.

Loss of Engine Power

Quick Check: Compare engine response while cutting normal grass under consistent load.

Fix Suggestion: Verify piston, rings, and cylinder condition to support proper compression and engine power delivery.

Prevention Tip: Prevent engine overheating by clearing debris from cooling areas daily.

Internal Engine Knocking

Quick Check: Listen for metallic knocking sounds while engine reaches operating temperature.

Fix Suggestion: Inspect piston, connecting rod, and cylinder components for wear that may cause internal knocking sounds.

Prevention Tip: Avoid prolonged operation with insufficient engine oil at all moments.

Customer Experience: A customer shared that replacing the piston assembly helped improve engine performance. The mower started smoothly and maintained more consistent power during regular mowing.