mercury Workshop Repair Guides

Mercury Workshop Service and Repair Manuals

Camshaft, Lifters and Push Rods > < Vehicle - Towing Behind RVs Guidelines|Page 926
Page 1
background image

Compression Check: Specifications

Compression Pressure Limit Chart

When checking cylinder compression, the lowest cylinder reading must be at least 75 percent of the highest cylinder reading. Perform compression test
with engine at normal operating temperature, with spark plugs and air cleaner removed, throttle wide open and distributor end of coil secondary wire
grounded. Refer to the compression pressure limit chart for pressure specifications.

Camshaft, Lifters and Push Rods > < Vehicle - Towing Behind RVs Guidelines|Page 926