BILT4ordTUF 0 #1 Posted February 13, 2009 :thumbs: I have come across a 520 with the Onan engine and a deck plus a rear scraper blade.I think it has a wasted piston. The owner says it has an electric winch with a cable that lifts both the deck and blade.I have never seen one of these. My 520 is all hydro. Any ideas out there. David in Ohio Share this post Link to post Share on other sites
nylyon-(Admin) 7,114 #2 Posted February 13, 2009 The 520's Onans had a problem with valve seats coming loose. It's possible that's what's wrong with the engine. I thought all 520's were hydro's :thumbs: Share this post Link to post Share on other sites
WHC-125 4 #3 Posted February 13, 2009 :thumbs: , And their were 520-8 speeds Share this post Link to post Share on other sites
Rideawaysenior 25 #5 Posted February 14, 2009 Even the hydro lift would use a cable to the rear clevis hitch. If it's a manual lift, you have a rare 520-8 speed. There were only a couple hundred made. Share this post Link to post Share on other sites
BILT4ordTUF 0 #6 Posted February 14, 2009 Thanks for the replies.I have not picked the tractor up yet but plan on doing it in a few weeks. I feel the valve seat is the problem as well. He says there is some gray stuff on the spark plug. :thumbs: Share this post Link to post Share on other sites
