Here’s a pic of that lower crank seal which likes to fall out or disintegrate and a link to the same ’63 Gale built Viking 15 horse running on a lake. I find the 15 is no screaming powerhouse and I can easily notice the extra power of an 18. Watch the video and compare it to your motor. ☺
https://www.youtube.com/watch?v=FlpD-mgtBpo
And a short video of a leaky top seal.
https://www.youtube.com/watch?v=cXt6fV6Z5rc
