Reply To: 1955 Evinrude 25hp sparker/slow crank question

[Don]

6.87 volts while cranking?  That is an issue .  I am assuming you are using a 12 volt battery of ample capacity to crank this engine and that you are using a 12 volt starter from a newer engine.  Have you had the battery load tested?  Have you checked each cell with a hydrometer (if it isn’t a sealed battery)?  You might try making up new battery cables and wiring the starter directly to the battery to rule out junction box/solenoid/cable issues.  Forgive me if these suggestions have already been mentioned and tried, quickly read over the thread just now.