which tecumseh engine do you have? parts list shows multiple tecumseh's used on that mower.. swapping engines is generally easier on pushmowers, as long as they have the same crankshaft length and diameter.
ENGINE, Tecumseh (
Model TVS90-43179D) 3.5 HP
Part# --
Not available
2
ENGINE, Tecumseh (Model TVS90-43180D) 3.5 HP Electric Start
Part# --
Not available
2
ENGINE, Tecumseh (Model TVS90-43248D) 3.5 HP
Part# --
Not available
2
ENGINE, Tecumseh (Model TVS90-43249D) 3.5 HP Electric Start
Part# --
Not available
2
ENGINE, Tecumseh (Model TVS105-53069D) 4 HP
Part# --
Not available
2
ENGINE, Tecumseh (Model TVS105-53072D) 4 HP
Part# --
Not available
2
ENGINE, Tecumseh (Model TVS105-53072E) 4 HP
Part# --
Not available
2
ENGINE, Tecumseh (Model TVS105-53073D) 4 HP Electric Start
Part# --
Not available
2
ENGINE, Tecumseh (Model TVS105-53105F) 4 HP Electric Start
Part# --
Not available
2
ENGINE, Tecumseh (Model TVS105XL-54018B) 4 HP Electric Start
Part# --
Not available
2
ENGINE, Tecumseh (Model TVS105XL-54018C) 4 HP Electric Start
Part# --
Not available
2
ENGINE, Tecumseh (Model TVXL105-54022B) 4 HP
2
ENGINE, Tecumseh (Model TVS840-8011A) 4 HP 2 Cycle
Part# --
Not available
2
ENGINE, Tecumseh (Model TVS840-8011B) 4 HP 2 Cycle