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Message: <blockquote data-quote="hynder" data-source="post: 28877" data-attributes="member: 1681"><p>Pulled the engine out and the engine runs fine. As far as moving the lever left to right this machine has none of these newer features. I believe this is the first year for hydrostatic drive and everything is very basic. There is no interlocks, parking brake etc. My thoughts are still that some type of pressure relief valve is not operating and the hydro preasure just builds up and kills the engine. I believe this as each successive time I start the engine it runs for a shorter time and is harder to restart, finally ending in not turning over at all. If it sets for a few hours it will again start and go through the same cycle again until it won't turn over. It starts and runs the longest when it sets overnight. My hope is that someone has some knowledge of these older machines and would know which valve etc may be the usual culprit. Thanks to all for your help.</p></blockquote><p></p>