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1998 bobcat 225 nt parts needed

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  • 1998 bobcat 225 nt parts needed

    i have a 1998 bobcat 225 nt with p216g onan looking for parts to get her running again.Looking for good second hand parts,crank,piston and rods.been looking but maybe no hard enough

    Thanks Sam

  • #2
    Originally posted by lopez62566 View Post
    i have a 1998 bobcat 225 nt with p216g onan looking for parts to get her running again.Looking for good second hand parts,crank,piston and rods.been looking but maybe no hard enough

    Thanks Sam
    Pistons and rods are easy. Crank is difficult because it must be a taper shaft. I would look for another welder. Onans are pricey to rebuild. Or try to get the crank reground.
    Kevin
    Lincoln ranger 305g x2
    Ln25
    Miller spectrum 625
    Miller 30a spoolgun
    Wc115a
    Lincoln 210mp
    F550 imt service truck

    Comment


    • #3
      Originally posted by Tryagn5 View Post
      Pistons and rods are easy. Crank is difficult because it must be a taper shaft. I would look for another welder. Onans are pricey to rebuild. Or try to get the crank reground.
      Kevin
      Ok,im going to pull the motor and finish taking it apart and see what else got damaged
      Last edited by lopez62566; 09-18-2015, 07:42 AM.

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      • #4
        Originally posted by Tryagn5 View Post
        Pistons and rods are easy. Crank is difficult because it must be a taper shaft. I would look for another welder. Onans are pricey to rebuild. Or try to get the crank reground.
        Kevin
        That '98 is going to have the 1" threaded crank on the rotor end and not tapered. If in fact you need a new one, I see them (take outs) on eBay from time to time with one there now (item# 131425998878).

        If it broke a rod (not unusual) and has metal transfer to the crank rod journal (typical) it can be saved by simply going at it with some coarse sand paper and changing to finer grit as you go until the aluminum is completely removed. Have done this numerous times myself with Onan and other small engines running aluminum rods with no bearing inserts.

        For parts, http://www.onanparts.com/ is one of if not the best place online to get parts and owner TJ is your #1 source for detailed information on these engines.
        Last edited by duaneb55; 09-19-2015, 08:24 AM.
        MM200 w/spot controller and Spoolmatic 1
        Syncrowave 180 SD
        Bobcat 225G Plus LPG/NG w/14-pin*
        *Homemade Suitcase Wire Feeder
        *HF-251D-1
        *WC-1S & Spoolmatic 1
        PakMaster 100XL
        Marquette "Star Jet" 21-110
        http://www.millerwelds.com/images/sm...rolleyes.png?2

        Comment


        • #5
          Originally posted by lopez62566 View Post
          i have a 1998 bobcat 225 nt with p216g onan looking for parts to get her running again.
          Where are you located?

          Comment


          • #6
            Originally posted by duaneb55 View Post
            That '98 is going to have the 1" threaded crank on the rotor end and not tapered. If in fact you need a new one, I see them (take outs) on eBay from time to time with one there now (item# 131425998878).

            If it broke a rod (not unusual) and has metal transfer to the crank rod journal (typical) it can be saved by simply going at it with some coarse sand paper and changing to finer grit as you go until the aluminum is completely removed. Have done this numerous times myself with Onan and other small engines running aluminum rods with no bearing inserts.

            For parts, http://www.onanparts.com/ is one of if not the best place online to get parts and owner TJ is your #1 source for detailed information on these engines.
            Thought they were of a taper, but safe to say they are more of a unique crank then standard. Never had a crank go bad in an onan, although have had them ball up aluminum from broken rods. Have seen many cases with holes from rods trying to escape the crankcase.
            Kevin
            Lincoln ranger 305g x2
            Ln25
            Miller spectrum 625
            Miller 30a spoolgun
            Wc115a
            Lincoln 210mp
            F550 imt service truck

            Comment


            • #7
              IIRC, it was just before mid 90s when Miller changed to the threaded crank/rotor from tapered.
              MM200 w/spot controller and Spoolmatic 1
              Syncrowave 180 SD
              Bobcat 225G Plus LPG/NG w/14-pin*
              *Homemade Suitcase Wire Feeder
              *HF-251D-1
              *WC-1S & Spoolmatic 1
              PakMaster 100XL
              Marquette "Star Jet" 21-110
              http://www.millerwelds.com/images/sm...rolleyes.png?2

              Comment


              • #8
                Originally posted by duaneb55 View Post
                IIRC, it was just before mid 90s when Miller changed to the threaded crank/rotor from tapered.


                Im located in Houston,Texas

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                • #9
                  Ok guys i removed the engine from the welder ,rotor and crankshaft and it looks like the case got beat up inside.The case # 170-4347 the question is what can i replace it with ?crank is going to have to be ground, to next size or two it egg shaped by 12 thounsands,rods 170-4444 like a granade went off inside oil pan

                  Comment


                  • #10
                    Based on your description, saving this one is going to be expensive.

                    Is the block damaged such that it's not serviceable?

                    When one rod breaks it's advisable to replace the other - even if it looks good. Aluminum rods have a finite life.
                    MM200 w/spot controller and Spoolmatic 1
                    Syncrowave 180 SD
                    Bobcat 225G Plus LPG/NG w/14-pin*
                    *Homemade Suitcase Wire Feeder
                    *HF-251D-1
                    *WC-1S & Spoolmatic 1
                    PakMaster 100XL
                    Marquette "Star Jet" 21-110
                    http://www.millerwelds.com/images/sm...rolleyes.png?2

                    Comment


                    • #11
                      Originally posted by duaneb55 View Post
                      Based on your description, saving this one is going to be expensive.

                      Is the block damaged such that it's not serviceable?

                      When one rod breaks it's advisable to replace the other - even if it looks good. Aluminum rods have a finite life.
                      I think the block would work ,if i dont find a
                      replacement for it.The small oil line inside got crushed an the outside were the lift
                      ers go got hit as well causing 2 lifters getting stuck in there bores

                      Comment


                      • #12
                        Ok,need help the block is not going to make it ,what can i replace the block with,i have part number 170-4347 on the old block what will it interchange with ?

                        Thanks

                        Comment


                        • #13
                          Here's what it looks like

                          Comment


                          • #14
                            Its just not worth the money on a 17 year old welder. Before you are done you will have $1500 into it if you can find all the parts.
                            then if a flywheel goes soon after rebuild another $600. Not worth it. You could find a newer used Bobcat with a Kohler for less than
                            $2000. JMO

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                            • #15
                              Is that like a 2 cylinder that is on the generator ?

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