mercury Workshop Repair Guides

Mercury Workshop Service and Repair Manuals

Piston Ring, Engine|Specifications|Page 3124 > < Piston Pin, Engine|Specifications|Page 3120
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Piston Ring: Specifications

End Gap

With 82.4 mm (3.2441 inch) gauge.

Top Ring .........................................................................................................................................................  0.100-0.250 mm (0.0039-0.0098 inch)
Second Ring ....................................................................................................................................................  0.270-0.420 mm (0.0106-0.0165 inch)
Oil Ring ...........................................................................................................................................................  0.150-0.650 mm (0.0059-0.0255 inch)

Service Limit  

Top Ring ................................................................................................................................................................................  0.500 mm (0.0196 inch)
Second Ring ...........................................................................................................................................................................  0.650 mm (0.0255 inch)
Oil Ring .................................................................................................................................................................................  0.900 mm (0.0354 inch)

Ring Clearance, Minimum-Maximum

Top Ring ...............................................................................................................................................................  0.040-0.075 mm (0.0015-0.0029 inch)
Second Ring ..........................................................................................................................................................  0.040-0.085 mm (0.0015-0.0033 inch)
Oil Ring

Nominal...........................................................................................................................................................................................................  Snug-Fit
Maximum (Limit) ....................................................................................................................................................................  0.10 mm (0.0039 inch)

Piston Ring, Engine|Specifications|Page 3124 > < Piston Pin, Engine|Specifications|Page 3120