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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
Bobcat 773 Rough Running After Engine Warm Up
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<blockquote data-quote="Dameon" data-source="post: 78893" data-attributes="member: 10703"><p>773 with about 2400 hours on it. Regular maintenance, not abused. Runs great when first started, but when the engine is fully warmed up (maybe 15-30 minutes runtime), it starts running rough. Within the next 5-10 minutes it'll barely run at all and will usually just die. If you can get it started, it'll just die almost right away. If I go pump the fuel bulb, it starts fine and runs great again for a while, then starts the same behavior. If it's running rough and I pump the bulb while running, it clears right up and runs fine for a while.</p><p>This model has the Kubota 56hp turbo diesel engine, V2003EB-T. As far as I can tell, without really digging into the engine bay, it has a mechanical fuel pump. Judging by the parts schematic, there are no other lift pumps (in-tank, in-line). It would make sense that the fuel pump might break down when heat soaked and goes back to normal when cooled down. A replacement fuel pump from the Bobcat place is $95. Not outrageous, but if there is a chance it could be something else, I don't want to waste $95.</p><p>Suggestions appreciated. Could it be a vaper lock issue? Maybe a crack in a hose that's letting air in? But why only when warmed up?</p></blockquote><p></p>
[QUOTE="Dameon, post: 78893, member: 10703"] 773 with about 2400 hours on it. Regular maintenance, not abused. Runs great when first started, but when the engine is fully warmed up (maybe 15-30 minutes runtime), it starts running rough. Within the next 5-10 minutes it'll barely run at all and will usually just die. If you can get it started, it'll just die almost right away. If I go pump the fuel bulb, it starts fine and runs great again for a while, then starts the same behavior. If it's running rough and I pump the bulb while running, it clears right up and runs fine for a while. This model has the Kubota 56hp turbo diesel engine, V2003EB-T. As far as I can tell, without really digging into the engine bay, it has a mechanical fuel pump. Judging by the parts schematic, there are no other lift pumps (in-tank, in-line). It would make sense that the fuel pump might break down when heat soaked and goes back to normal when cooled down. A replacement fuel pump from the Bobcat place is $95. Not outrageous, but if there is a chance it could be something else, I don't want to waste $95. Suggestions appreciated. Could it be a vaper lock issue? Maybe a crack in a hose that's letting air in? But why only when warmed up? [/QUOTE]
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Bobcat 773 Rough Running After Engine Warm Up
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