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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
742B starts then dies after 20 or 30 minutes
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<blockquote data-quote="brdgbldr" data-source="post: 121921" data-attributes="member: 7474"><p>Could be a short in the electrical or a bad ignition switch or a bad fuel shutoff or a bad anti-dieseling solenoid.</p><p></p><p>My 742B had an anti-dieseling solenoid that never worked when I got the machine. It was disconnected and the tubes that went to it blocked off. It only dieseled once in a while. You could disconnect yours and see if you have the same problem or not.</p><p></p><p>Your fuel shutoff closes when it doesn't have power. The machine will keep running for about 2 minutes when this happens since there is still fuel in the carb. However, this normally makes it hard to restart the machine since the carb fuel bowl is empty. This could be a bad shutoff, a short or a bad ignition switch causing this. </p><p>You could replace the fuel shutoff and see what happens. When mine failed it was actually stuck open which caused fuel to flood the engine and go into the oil since the fuel in the tank is above the carb. There are several posts on here about where to get a new shutoff.</p><p></p><p>I had to replace the ignition switches in several 742's. They are pretty cheap and easy to replace. They seem to go bad pretty often. I would probably start with this.</p><p></p><p>Sorry I couldn't be more specific but that's how long distance diagnoses go.</p></blockquote><p></p>
[QUOTE="brdgbldr, post: 121921, member: 7474"] Could be a short in the electrical or a bad ignition switch or a bad fuel shutoff or a bad anti-dieseling solenoid. My 742B had an anti-dieseling solenoid that never worked when I got the machine. It was disconnected and the tubes that went to it blocked off. It only dieseled once in a while. You could disconnect yours and see if you have the same problem or not. Your fuel shutoff closes when it doesn’t have power. The machine will keep running for about 2 minutes when this happens since there is still fuel in the carb. However, this normally makes it hard to restart the machine since the carb fuel bowl is empty. This could be a bad shutoff, a short or a bad ignition switch causing this. You could replace the fuel shutoff and see what happens. When mine failed it was actually stuck open which caused fuel to flood the engine and go into the oil since the fuel in the tank is above the carb. There are several posts on here about where to get a new shutoff. I had to replace the ignition switches in several 742’s. They are pretty cheap and easy to replace. They seem to go bad pretty often. I would probably start with this. Sorry I couldn't be more specific but that’s how long distance diagnoses go. [/QUOTE]
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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
742B starts then dies after 20 or 30 minutes
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