hi has anyone ever replaced the top crankshaft seal on a 345 with 20 hp kawasaki. how do you remove the old seal and do you need special tools. i drained the radiator and removed it pulled the flywheel and sure enough the top seal is leaking and oil is oozing down sides of engine. i called the local jd dealer a new seal costs five bucks so if i can do it myself it would be a cheap fix. any info would be appreciated thanks.