Str8rayzor 3 #1 Posted November 25, 2023 My dad is rebuilding a 1970 c-125 auto for someone and can't seem to figure out the correct hydraulic fluid to use. I've searched quite a bit myself and also can't find a straight answer. Any help would be greatly appreciated. Share this post Link to post Share on other sites
ebinmaine 67,516 #2 Posted November 25, 2023 The C Series 125 should be a 1980. Do you have any pics to show what you're working on? If it's a 1980 C125 Hydro it should use motor oil. 2 Share this post Link to post Share on other sites
953 nut 55,247 #3 Posted November 25, 2023 A Wheel Horse transaxle should have 10-30 motor oil and while you are at it replace the filter with a NAPA 1410 or WIX 51410. 4 Share this post Link to post Share on other sites
Str8rayzor 3 #4 Posted November 25, 2023 4 hours ago, ebinmaine said: The C Series 125 should be a 1980. Do you have any pics to show what you're working on? If it's a 1980 C125 Hydro it should use motor oil. It may well be an 80, he wasn't real sure on the year. 3 Share this post Link to post Share on other sites
ebinmaine 67,516 #5 Posted November 25, 2023 4 minutes ago, Str8rayzor said: It may well be an 80, . Yepp it is. Nice work on that home shop made rear fender!! 1 Share this post Link to post Share on other sites
peter lena 8,631 #6 Posted November 25, 2023 @Str8rayzor agree with @ebinmaine on the rear fender base set up ! to me would be a perfect time to , get some operational run time on every area . done a carb bowl drop / inspect / clean out ? engine oil status ? condition ? like ROTELLA 30 WT , and RISLONE zinc, those engines really respond to clean running , and varnish cleaning , got a roller stool to cruise around that ? check out how things work / makes things easier . looks good , pete 1 Share this post Link to post Share on other sites
squonk 41,120 #7 Posted November 25, 2023 10/30 Mobil 1 in that Eaton Transmission 1 Share this post Link to post Share on other sites
