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9N'er..... .oooh my goodness, sucha buncha expensive questions. Generally, overhaul decisions are made because the engine doesn't have enuff power, does't start eazy, burns so much oil the sparkplugs are always fouling up. How long can you afford to have the tractor "tied up"? My advice, if you don't know what you're doing, pay a competent mechanic to check your engine out. If you want to get that involved, see if you can find a "night class" at the local high school for some training. There are some good general "how to" books at the local libarary to help with your eduication process. Idiots can do it, but it helps to be an eduicated idiot (grin). 1. to replace rings, remove cylinder head, remove pistons, replace rod bearings. 2. crank bearings depend upon micrometer readings of crankshaft, wheather needs to be reground 3. almost always have to split tractor to haul engine to machine shop for crank and cylinder work. so yes, replace the clutch disk and throughout bearing 4. Cost, DIY $400+, local machine shop $1200 which may or may not have ever seen a tractor engine, $1400 for factory rebuilt Then ya' opens yer wallet and lets 'em fly..... .Dell
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