Page 33 - REPOWER REFERENCE GUIDE (2020)
P. 33
Engine Failure Diagnosis
Pistons
The improper riser height on a 5.7L engine allowed water ingestion which caused a stuck piston.
a - Stuck piston
a 68060
Valves
A lack of water caused a 5.7L engine to overheat which caused preignition and detonation.
a - Preignition and detonation
damage
a
68063
Improperly installed risers and muffler on a 7.4L engine allowed water ingestion which caused stuck valves.
68061
Stuck valves
90-8M0149179 eng NOVEMBER 2018 © 2019 Mercury Marine Page 3A-7
