Because the creators, King Features, had no cartoon studio of its own, storyboards were created in house and sent of to several various different studios to be animated. The result is a noticeable variation in animation style and quality from episode to episode.
The character of Mr. Wimpy inspired the Wimpy fast food restaurants serving hamburger-based meals in the UK. Mr. Wimpy eats hamburgers.
At the time this show was produced, spinach was regarded as a "power food", which explains why it was chosen as Popeye's favorite dish. However, it was later discovered that the myth about the spinach's "superpowers" and its exceptional high amount of iron arose from a miscalculation.
The 1982 Popeye game was based on this series, with the villain being Brutus rather than Bluto.
Differs from the original cartoons mostly with the Sea Hag character as a villain, and the island natives, called Goons.