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Briggs and Stratton 550 self propelled/Poulon Pro. Have replaced the spark, cleaned the carb(with carb spray), replaced the oil/checked the oil level and installed a new breather. When I start the engine the engine runs strong at first, then slowly the RPMs get erratic and eventually(maybe...

Briggs and Stratton 550 self propelled/Poulon Pro. I changed the oil and the problem persists. I found this webpage: White Smoke From My Engine which said to clean out or just replace the crankcase breather. Not being familiar with this, I typed it into google images, but still not sure...

Previously I posted that I could get my B&S 550 engine to start for a few seconds after priming, then it stalled out. It was suggested that I (a) clean the carb out thoroughly and (b) check the diaphragm. I did both. I also accidentally pulled out the coil/rope on the starter. The diaphragm...

Recently I accidentally pulled out the whole thing and had to rewind the coils and put everything back together. After playing around, I can now pull the rope out(and it automatically springs back in) - but only about 3/4 of the way. Thus, not enough pull to start the mower. What should I...

Have a 3 year old Poulan with B&S engine. When I prime it, it starts up at very fast RPM speed for a few seconds then shuts off. It seems if I pump the primer more than usual, it might fun a little longer, but then shuts off. It's not getting any fuel once it starts up?

I have mostly city clients with small lots - and a couple church lawns. About 10 clients, some bi-weekly. I have had constant problems with consumer level mowers(only ones I can fit in my car's trunk) - mostly carb issues. 1. I was under the impression I was cleaning the carbs diligently and...

As a profitable sideline, I've been mowing lawns about 6 years now. I do mostly small city lots with even smaller lawns. Big professional equipment(both sit down or standup) is too big for the small, contained lawns I mow. I have been using consumer mowers. But the one constant aggravation...

I have a very small lawn mowing business. Mostly urban sizes lawns. Having trouble with both new and used mowers I've purchased. Main problem seems to be dust getting in the carb(and engine?). This is especially true mower easement areas - I think salt trucks in the winter kill the grass...