Johnson J10RLSUR, Service Manual

Page: 123 / 229

121
POWERHEAD
GENERAL
7
GENERAL
Cylinder Compression Testing
Start and run outboard until it achieves operating
temperature, then shut OFF.
Remove all spark plugs and disconnect the 5-pin
power pack connector.
Advance throttle linkage to WOT.
Install compression tester’s hose attachment into
spark plug hole (14 mm threads).
While cranking outboard with starter, note maxi-
mum pressure reading on gauge. Repeat proce-
dure for each cylinder.
Return throttle to idle position and reconnect
power pack connector. Replace spark plugs.
Retaining Ring Pliers
Taper Pin Tool
Retaining Ring Pliers DRC2523
WARNING
Striking a steel punch with a steel hammer may produce chips which can
cause serious damage to eyes. Safety glasses must be worn to prevent injury.
Cold Roll Steel
Heat treatment: Carburize 0.015 to 0.020 in. (0.3 to 0.5 mm) deep.
Quench and harden to 58 to 62 R “C” case.
– Hole for Storage