Ariens ST504 Snow Blower Category
Original Model: Tecumseh HS50
This engine has a 3/4" x 2-5/16" shaft on it and a 1/2" x 3/4" pto shaft. If you use the Lh195sa-67435 engine with the single shaft, you may be able to use your side plate and cam shaft of your old HS50 engine to make the new engine have a secondary pto shaft if your exhaust port is located to the right of the carburetor.
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While we may have sold many engines listed above to be used for a Ariens ST504 Snow Blower Category, we are NOT claiming these are exact replacements unless the product notes explicitly say so. Many original equipment engines may no longer be in production because of obsolescence or EPA regulations, so in some cases there may not be an exact replacement available. Our intention here is to show that other customers have utilized these in the equipment shown, but may have had to make some modifications to do so. If we know of any required changes, we will list those, however, some adapting during installation should be expected.