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General Skidsteer & Technical Topics
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630 Repower
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<blockquote data-quote="ancomcabs" data-source="post: 52576" data-attributes="member: 6435"><p>Tazza The problem has surfaced now that warmer weather is here. When cold it starts easy and runs well (at least as well as I can expect from a 35 year old motor). Last two times I've used it after about a half hour or so it would slowly sputter and die, fooling with the choke would help slightly but only for another minute or so then it would die. After allowing it to sit for a while it could be started again but with a little more difficulty but then it would eventually die again. It has the electronic ignition so I don't think the condenser is the problem. I leaning towards thinking vapor lock, I have pulled the fuel line away from the engine as much as possible and am going to fab a simple heat shield to try and help keep the carb cooler. There is also a service to the manifold that involves making a hack saw cut between the intake and exhaust side to help keep heat from transferring over. I'm going to insulate the fuel line as well to see if that helps. The other thing that concerns me is maybe the engine is just running hotter than it should and that is why the vapor lock issue? If so why is it running hot? Oil has been recently changed and is full, fins have been cleaned out and all metal shrouds are in place. Any idea what the temperature of the engine should be when running, I could check it in various places with an infrared thermometer next time I use it. I'm not eager to spend money if I don't have to but am just looking into all my options should the heat issue be due to an expensive internal problem</p></blockquote><p></p>
[QUOTE="ancomcabs, post: 52576, member: 6435"] Tazza The problem has surfaced now that warmer weather is here. When cold it starts easy and runs well (at least as well as I can expect from a 35 year old motor). Last two times I've used it after about a half hour or so it would slowly sputter and die, fooling with the choke would help slightly but only for another minute or so then it would die. After allowing it to sit for a while it could be started again but with a little more difficulty but then it would eventually die again. It has the electronic ignition so I don't think the condenser is the problem. I leaning towards thinking vapor lock, I have pulled the fuel line away from the engine as much as possible and am going to fab a simple heat shield to try and help keep the carb cooler. There is also a service to the manifold that involves making a hack saw cut between the intake and exhaust side to help keep heat from transferring over. I'm going to insulate the fuel line as well to see if that helps. The other thing that concerns me is maybe the engine is just running hotter than it should and that is why the vapor lock issue? If so why is it running hot? Oil has been recently changed and is full, fins have been cleaned out and all metal shrouds are in place. Any idea what the temperature of the engine should be when running, I could check it in various places with an infrared thermometer next time I use it. I'm not eager to spend money if I don't have to but am just looking into all my options should the heat issue be due to an expensive internal problem [/QUOTE]
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