Repowering a Gravely 250z question

Discussion in 'Mechanic and Repair' started by fool32696, Jul 12, 2007.

  1. fool32696

    fool32696 LawnSite Senior Member
    Messages: 993

    My mower has a 20hp Briggs & Stratton Vanguard vertical shaft and I'm at the point where I'd like to replace it. I found a replacement engine on Ebay. My other engine is a 2000 model and the new one looks a lot different. The specs for the new one says it has a 1" x 3 5/32" output shaft. How can I make sure it's the same as my current motor. I'd check but the mower is 20miles away and The auction ends tomorrow morning. I've checked my owners manual and the Gravely parts radar and can't find anything. I do plan on calling the seller tomorrow morning if I can't find out anything by then.
  2. khouse

    khouse LawnSite Bronze Member
    Messages: 1,465

    First you need to post the model, code and type on your existing engine. Or you can remove the clutch and measure your crank.
  3. fool32696

    fool32696 LawnSite Senior Member
    Messages: 993

    Model 351777
    Type 1137-E1
    Code 99091611
    I measured the shaft and got 1 1/8" diameter x 3 3/8" length

    Any ideas on a cost effective replacement motor?
  4. Bill Kapaun

    Bill Kapaun LawnSite Senior Member
    Messages: 965

    According to the Briggs IPL, types 1134 & 1137 are the only 2 that are different from ALL the other 20 HP Vanguards! (crankshaft wise)
    Sometimes it's a pain to be "special":)

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