Ingersoll-Case 4020 Mower, Lawn and Garden Tractor Category

Original Model: Onan 20hp

One of the original spec numbers was P220G 10904. The complete 20hp engine is no longer available for this. Our Vanguard Conversion Kit works well in these tractors.

Parts List

2 Products



18hp Horizontal, Vanguard, OHV, Oil Filter, Electric Start, fits Case 446 & 448 Briggs & Stratton Engine, Briggs & Stratton



Use 356447-1-Case446R6


23hp Horizontal Vanguard 1-1/8"x3-5/8" Shaft, Oil Filter and Cooler, Electric Start, fits Ingersoll 4018 4020 3016 3018 3020 Briggs Stratton Engine


In Stock:3

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General Disclaimer

While we may have sold many engines listed above to be used for a Ingersoll-Case 4020 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.