Those carbon flakes are usually from the old 30 weight oil trolling in cold northern water. A dose of Sea Foam should clean it out. At least it kept the top rod lubricated. Keep an eye out for mono-filament fish line on the prop shaft. That was the chief cause of water in the gear-case. That would rust the shock absorbing clutch under the water pump which would break and wind up pushing against the top L/U bushing. This can cause enough friction to stop the motor and make you think the powerhead is seized. And of course check the seal on the bottom main bearing. Great looking motor ! ! ! 😉
