Welcome
Under the seat is a sticker with a number on it starting with 40 ( deck size in inches )
We need this number
You have the Asia / Eu spec machine if the decal on the side of the engine is 145 / 102 (engine Hp, 14.5 / deck in cm )
This might be a little different from the US model but the only on line information is for the US machines
On the rocker cover will be the engine numbers these have a date code in them and they can be helpful as well .
Depending upon he age you could have a hydro or manual transmission
Sentenial was a customer of Murray and Murray made mowers for them for a long time.
Hydro just has one pedal for forward & reverse, manual has a gear lever to go from F to R
Once you know the actual model code then Manuals library (
www.Manualslib.com ) has most of the murray owners manuals there.
The owners manual usually has the parts manual at the back
And FWIW Victa sold the same ride on mowers branded Victa and painted green
4015X for the manual
4015HX for the hydro drive
These manuals are on the Outdoor king web page &/or Vintage mowers forum web page
despite having a .com URL both of these sites are based in OZ
OutdoorKing comes from Bruces shop in Concord NSW , while Vintage mowers is just an enthusiasts page.
Both of them will require you join & pay a $ 5/ y subscription if you want access to the data download section, the forum sections are free .
Big problem with Murray is it is now owned by B & S and now that the old franchise agreement has expired B & S distribute all original Murray parts and the warehouse will not bring in any part that does not sell in large enough volumes so some parts are hard to get .
Good thing is RGS who have a SA warehouse carry most service parts from good quality after market suppliers , Stens also do a line of parts , currently out of the Masport warehouse in Melbourne & Jakmax do a range of mostly poor quality Chinese copies parts from their Melbourne warehouse