If you suspect worn rings/leaking valve(s) do a leakdown test on eng,if rings leaking you'll hear/feel air coming out the breather valve or dipstick tube/oil fill hole,if valves leaking you'll hear/feel out intake/exh,if a leaking head gasket you'll hear/feel while checking around where head/block meet.A lot of the old K seriers tend to develop a head gasket leak in area of exh valve,if it has been a long term leak you'll see oil on head/block.
If you downloaded/saved K series manual look on pgs 8.2-8.3 will tell you the correct way to time eng either static or with a timing light.
Before getting to deeply involved with eng,check mower deck,you may have worn/bad bearings in blade hubs/idler pulleys & eng being overloaded due to mech drag when blades loaded in high grass,in addition blades may need sharpening/replacement.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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