Re: 1938 Evinrude 3 hp weak spark on one cylinder Home › Forum › Ask A Member › 1938 Evinrude 3 hp weak spark on one cylinder › Re: 1938 Evinrude 3 hp weak spark on one cylinder olcahUS Member - 1 Year (includes $3 online payment fee)Replies: 566Topics: 94 September 1, 2017 at 2:53 pm #64129 Yes, it is an opposed twin. Plugs are near new and I swapped cylinders. Checked sparked with gap tester and with neon light, same result. Yes just one set of points. I am thinking coil too.