Re: 1930 Elto Senior Speedster Water Pump Impeller Home › Forum › Ask A Member › 1930 Elto Senior Speedster Water Pump Impeller › Re: 1930 Elto Senior Speedster Water Pump Impeller wbeatonCanada Member - 2 YearsReplies: 1037Topics: 101 May 22, 2018 at 6:30 pm #76573 Good question. Johnson TD/TN series and Martin both use wobble pumps in the 1940’s. Wayne Upper Canada Chapter uccaomci.com