Reply To: Evinrude 1956 7.5 powerhead

[johng]

It seems to me 53′ – 58′ OMC 7 1/2 hp motors are more susceptible to bottom Rod Failure than their 5 1/2 hp cousins. The motor made just enough more power with that Aluminum Rod and no needle bearings that if the Impeller was failing or Insufficient Oil was used the result over time was excessive Heat on the Rod. Then a Crash. I blame the 50 : 1 oil mixture that came later as part of the problem.