briggs 26hp els problem

15 years ago

just got engine rebuilt, carb rebuilt, new fuel pump filter plugs and pto done. ran great for few hrs. then started to over rev then under rev then seemed to misfire or starve for fuel. it doesn't happen in that order all the time. sometime it one of the three from start up and starts doing something else. it all started after the float needle stuck in the carb and dumped gas in oil and caused the lower seal to leak. rebuilt the engine. after about an hr. of use seal started leaking again. complete rebuild of the carb. problem stopped and no more seal leak. now after a few hrs. of use, the three issues of under rev, over rev, and missing have me stumped. any suggestions would helpful thanks

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Comments (3)

sdehaven
Original Author
15 years ago
model # 44p777 2006 model year
tomplum
15 years ago
On occasion, the plastic intake manifold will create that phantom symptom. It seems as though they sometimes can leak as they warm and then run good again. Strange stuff...
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sdehaven
Original Author
15 years ago
Stopped by a different mower shop today and he was 95% sure it was a carb problem. So i took the carb apart and used a whole can of carb cleaner on it. Got it back together started her up and it ran like new! The shop that did the rebuild must not of clean it out very well and just swapped out the gaskets and stuff. I put 6 hrs. on it today without even a hiccup. Go figure. Guess I found a new mechanic if I need on the future. The other guy said the engine must be shot and wanted to sell me new one for $1000. I guess I saved myself $997 by going somewhere else. Always get a second opinion. thanks