Simplicity Sunstar Mower, Lawn and Garden Tractor Category

Original Model: Misc

These were made with different engines in them. When repowering a tractor with a single cylinder, you will need to use the single cylinder until a replacement is found for it. When replacing a Magnum series 18 or 20hp, you can use one of our conversion kits for these tractors. If you have a Command in your tractor now, we can probably also get that same engine or a shortblock for it, or you can buy our conversion kit made special for that tractor. Our conversion kit to replace the Magnum engine comes with a muffler that sticks out the left side panel, but we do not have a muffler that sticks out the front of the grill.

Parts List

2 Products



23hp Horizontal Vanguard 1-1/8" Shaft Repower Conversion Kit, Fits Simplicity Sunstar, Agco Allis 1920, & Deutz Allis 1920 with Kohler Magnum, Briggs & Stratton Engine, Briggs & Stratton


In Stock:3


20.5hp Command OHV Horizontal 1-1/8" x 2-3/4" Shaft Electric Start fits Simplicity with Command Engines, Supersedes CH640-3110 CH20S-64512, Kohler Engine



Available to ship to you direct from our supplier.

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General Disclaimer

While we may have sold many engines listed above to be used for a Simplicity Sunstar Mower, Lawn and Garden Tractor 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.