Chrysler 55 hp Model 559HA 1970 motor problems

SPMotor

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May 19, 2022
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Hi, I have been restoring a 1970 (Model 559HA) Chrysler 55 hp outboard engine. At first things seemed to be going well but then there were problems running the engine. The following things have been done:
1. Suspected engine cover gasket leaking cooling water into engine crankcase> new engine cover gasket replaced but the problem did not go away. Everything looks good inside the engine
2. The breaker plate has been checked and the connector surfaces have been sanded and checked that the spark plugs are working correctly

May it occur to you what the problem might be?

Problem

Inside motor

When the motor was working
 
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