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  1. #31
    Gold Member botamike's Avatar
    Join Date
    Aug 2007
    Posts
    338
    Location
    Kokomo, IN
    Tractor
    Allis Chalmers 920 Diesel

    Default Re: Simplicity Sunstar

    Sounds like she has thrown a rod, typical for older Onans, time to chuck it and drop a new Vtwin in it. Look at both Kohler Command and Briggs Vanguard Vtwin engines. Small Engine Warehouse and Jim's Small Engines offer repower kits to re engine the Sunstar. It would be cheaper than trying to replace this machine with one equil to it that is new. A new equil to this machine will push close to 10K for either a JD or Cub Cadet SC2400. Even the top regular Cub Cadet GT is weak compared to a SunStar. You basicly need a new sub compact to equil what the sunstar can do. I know a new Vanguard is around 1400-1700 depending on what HP you want to go with, its not a hard job to swap out the engine either. Cheers Mike
    Head Technician, Quality Outdoor Power, home of Simplicity, Snapper/Snapper Pro and Scag mowers
    Allis Chalmers 920 Diesel

  2. #32
    New Member redmule's Avatar
    Join Date
    Oct 2010
    Posts
    9
    Tractor
    DEUTZ-ALLIS ULTIMA

    Default Re: Simplicity Sunstar

    This is a 1989 deutz-allis ultima. Dale
    Attached Thumbnails Attached Thumbnails -100_0223-jpg  

  3. #33
    New Member
    Join Date
    Nov 2010
    Posts
    22
    Tractor
    1975 ford lt16 twin i/c

    Default Re: Simplicity Sunstar

    is the thrown rod bad enough that you need to replace the motor? can that block be rebuilt?

  4. #34
    Elite Member KentT's Avatar
    Join Date
    Mar 2005
    Posts
    2,648
    Location
    Sevierville, TN
    Tractor
    Power Trac PT 425

    Default Re: Simplicity Sunstar

    Quote Originally Posted by fordlt16twin View Post
    is the thrown rod bad enough that you need to replace the motor? can that block be rebuilt?
    Onan parts are so danged expensive that in that scenario, most people will just replace them with a Kohler Command, Honda V-twin, or less-commonly a Briggs Vanguard -- which are all good, newer style V-twin engines.
    Power Trac PT-425 w/numerous attachments
    Allis-Chalmers B-210 w/several attachments
    Gravely 5260 walk-behind w/two attachments
    Yamaha Rhino 450 UTV w/numerous mods
    More pictures & info about my garden tractors

  5. #35
    Gold Member newt92's Avatar
    Join Date
    Dec 2007
    Posts
    344
    Location
    Secor Illinois
    Tractor
    John Deere 2520 and 2305

    Default Re: Simplicity Sunstar

    20 hp Sunstars never had Onan engines from the factory, only Kohlers. If its 1992 or older, its a Kohler Magnum. 1993-1997 were Kohler Commands.
    2007 JD 2305, 2008 JD 2520 w/200cx loader, Harbor Freight quick hitch, homemade pallet forks, 5' KK tiller, 5' KKxb disc, 4' landpride pulverizer, Frontier RB1072 blade, homemade 5 1/2' lawn roller at 3500lbs, 2005 John Deere 797 w/60" deck, 2009 John Deere 997 w/ 72" deck, 2005 JD HPX Gator w/power dump, 1998 Toro 455D 10.5' deck!

  6. #36
    Elite Member KentT's Avatar
    Join Date
    Mar 2005
    Posts
    2,648
    Location
    Sevierville, TN
    Tractor
    Power Trac PT 425

    Default Re: Simplicity Sunstar

    Quote Originally Posted by newt92 View Post
    20 hp Sunstars never had Onan engines from the factory, only Kohlers. If its 1992 or older, its a Kohler Magnum. 1993-1997 were Kohler Commands.
    You're correct. I was reading much earlier replies specifically talking about Onans, and thought that was what the current subject was. The PowrMax had Onan engines, the Sunstars had Kohlers...

    Looks like a 1986-1991 (thanks to your posts!)
    Number of hours 820.6 as of 9-5-2009
    50 Lawn mower deck
    Onan Engine Model
    Hydrostatic drive, High/Low ranges

    It is Sept 2009 and my Onan engine is gushing oil from the right side of the engine (as I sit in the drivers seat). I am towing it into a shop to get an assessment. Darn. Darn.
    Power Trac PT-425 w/numerous attachments
    Allis-Chalmers B-210 w/several attachments
    Gravely 5260 walk-behind w/two attachments
    Yamaha Rhino 450 UTV w/numerous mods
    More pictures & info about my garden tractors

  7. #37
    New Member
    Join Date
    Nov 2010
    Posts
    1
    Tractor
    1991 simplicity sunstar

    Default Re: Simplicity Sunstar

    A good way to find the year of anything with a kohler engine in it
    is to check s.n.# on motor the first 2 digits 15 being 1985 16, 1986 ect.. ect.. my first 2 digits on my sunstar is 21 making the engine 1991
    thinking thats the year of machine i no its the year of motor anyway

  8. #38
    Bronze Member wwmw's Avatar
    Join Date
    May 2012
    Posts
    59
    Location
    Limestone, TN
    Tractor
    Ford LGT 145 14HP KOHLER

    Default Re: Simplicity Sunstar

    Can anyone help me here? I also have a Sunstar GTH 20 but, its been repainted and I can't find the model number to order parts if needed, also been looking for owners manual for it. I would upload pic but, I am new to this fourm and haven't figured it out yet

    Thanks!
    William

  9. #39
    Bronze Member wwmw's Avatar
    Join Date
    May 2012
    Posts
    59
    Location
    Limestone, TN
    Tractor
    Ford LGT 145 14HP KOHLER

    Default Re: Simplicity Sunstar

    Has anyone put a FEL on their Sunstar? I've been wanting to but, have no idea where to start. cylinders, pump, bore stroke everything can anyone help? It has the f&b pto's

    Thanks!
    William

  10. #40
    Member mmtd's Avatar
    Join Date
    Jan 2013
    Posts
    42
    Location
    souris nd
    Tractor
    simplicity sun star 20 gth

    Default Re: Simplicity Sunstar

    wow most of the sun stars I have seen have been around $1700.00 to $4grand for tractor and attachments.

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