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Can a L100 John Deere 17hp engine be replaced with a John Deere 21hp engine?

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    Anything is possible. Do you have specific concerns about doing this? You'll need to narrow down the question more for anyone to be able to help.
    – raydowe
    May 31, 2017 at 14:52
  • Welcome to the site. The JD 17hp engine will either be manufactured by Briggs & Stratton or Keohler. Depending on which 21hp engine you are looking at will let us know if it can be used in its place. The 17hp engine has a 4 bolt mounting plate on the bottom which is very common. I'd bet the 21hp engine you're looking at is setup the same. I'd also suspect the 21hp is a v-twin. What it actually is will differentiate whether it will bolt up or not, but more than likely it will. There would possibly be some wiring/exhaust things you'd need to sort. May 31, 2017 at 14:57
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    @Pᴀᴜʟsᴛᴇʀ2 looks like the L100 has a Briggs, and I'm guessing it's probably the Intek 31F707-0112.
    – anonymous2
    May 31, 2017 at 17:22
  • Yes the L100 uses the Briggs engine.
    – Moab
    Jun 19, 2017 at 1:12

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