Page 41 - REPOWER REFERENCE GUIDE (2020)
P. 41

Engine Failure Diagnosis

               •  Incorrect sterndrive application (Alpha Gen I or older not properly adapted to newer engines with seawater pump kits)
               •  Loose spark plugs
               •  Overpropping
               NOTE: Engine failures that result from the foregoing conditions are beyond the control of Mercury. Therefore, no warranty will
               apply to failures that occur under these conditions.
            Detonation Damage



















                                                                                68278














                                                                                 23037



                    a                 b                c                 d











                                                                                           23039

               a - Spark occurs
               b - Combustion begins
               c - Combustion continues
               d - Detonation occurs
















            90-8M0149179 eng NOVEMBER 2018                        © 2019 Mercury Marine                    Page 3A-15
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