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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
Bobcat 763 runs and then smokes and dies
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<blockquote data-quote="Topcat1952" data-source="post: 131628" data-attributes="member: 23130"><p>I now feel so obligated to assist on this platform because of a gentleman who has reached out and given me some very valuable advice... So, hear goes....Black smoke often means too rich or too much fuel... White smoke means a leaner condition and if runs then dies and a poor restart probably means 1. starving for fuel, running out of fuel and the third would be not able to maintain fuel...</p><p>1. Starving for fuel would be a lack of fuel to injectors, by plug filters or injector pump</p><p>2. Running out of fuel would probably a fuel pump issue.... A fuel pump pressure test will ID this issue (also watch for bubbles)</p><p>3. Running out of fuel, does not always no fuel in the tank, If the fuel pump checks well look for a leak on the suction side.. Ues a vacuum gage in line coming from the tank, pull enough vacuum just enough to have fuel in the vacuum chamber, and stop...If much a leak vacuum will drop fairly quickly, but a small slow drop would indicate a low leak, causing air into the system and eventually running poorly to stop... A lot of white smoke....Most likely a pinhole in the suction line from the tank to pump....Best check of that is full tank fuel and restart... </p><p>All this and the most problem of sucking leaks are primer pumps....lol, I had to cover other things.... If you wish to check the primer pump... start the engine and use a heavy oil and LOW fuel mix and spry on the pump while running ( THIS COULD BE CONSIDERED DANGEROUS) listen to the engine speed, it will start to get better or if no leak no chance...Always find cuase of the starting condition before replacing parts....</p></blockquote><p></p>
[QUOTE="Topcat1952, post: 131628, member: 23130"] I now feel so obligated to assist on this platform because of a gentleman who has reached out and given me some very valuable advice... So, hear goes....Black smoke often means too rich or too much fuel... White smoke means a leaner condition and if runs then dies and a poor restart probably means 1. starving for fuel, running out of fuel and the third would be not able to maintain fuel... 1. Starving for fuel would be a lack of fuel to injectors, by plug filters or injector pump 2. Running out of fuel would probably a fuel pump issue.... A fuel pump pressure test will ID this issue (also watch for bubbles) 3. Running out of fuel, does not always no fuel in the tank, If the fuel pump checks well look for a leak on the suction side.. Ues a vacuum gage in line coming from the tank, pull enough vacuum just enough to have fuel in the vacuum chamber, and stop...If much a leak vacuum will drop fairly quickly, but a small slow drop would indicate a low leak, causing air into the system and eventually running poorly to stop... A lot of white smoke....Most likely a pinhole in the suction line from the tank to pump....Best check of that is full tank fuel and restart... All this and the most problem of sucking leaks are primer pumps....lol, I had to cover other things.... If you wish to check the primer pump... start the engine and use a heavy oil and LOW fuel mix and spry on the pump while running ( THIS COULD BE CONSIDERED DANGEROUS) listen to the engine speed, it will start to get better or if no leak no chance...Always find cuase of the starting condition before replacing parts.... [/QUOTE]
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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
Bobcat 763 runs and then smokes and dies
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