Question about Briggs & Stratton Measuring Tools & Sensors
Using a lot of oil, compression seems fine, spark plug has carbon deposits and oil fouled; smokes when blades under load; lot of carbon build up around where exhaust pipe enters muffler.
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Posted on Jan 02, 2017
Try checking the prefilter on your air filter. I had a similer problem and mine prefilter was completly covered in dirt. I changed the air filter and it solved my problem. Also make sure the air intakes are not partially clogged with dirt or other stuff.
Posted on Jul 20, 2009
First thing to do is pull your dipstick and check for broken or missing O-ring also as you pull it, look to make certain that it was seated properly and all the way locked. If either condition exists, you will be leaking into the crankcase which will cause your symptoms
Posted on Sep 14, 2009
Very likely, the piston rings are badly worn or stuck. There may even be a small hole in a piston. In any case, you will need a major tear-down to repair this one. This is usually caused by lax oil-changes. It might be better to purchase a replacement engine than try to fix everything that could be wrong with the present unit if you take into account parts and labor. Hope this helps!
Posted on May 24, 2010
SOURCE: I have a 21 hp
It sounds like the oil was filled way too much and was kicked around violently as you started it, usually the oil filler plug will show full with only an inch or less showwing on the dip stick which is part of the plug. You have to screw it in and take it out to get the right measurement. Also cold weather may be making your oil very thick if it is a multi weight 20-50W oil for trucks, it is super thick when starting up. I would try a light oil like 10-30 if allowed in your manual, keeping in mind this motor always travells 3500 rpm where a truck or car would only be doing 700 rpm when cold started. For very cold startup conditions I would use Syntec 5-30W 100% synthetic oil (it's about five times more expensive than most) which I use in a 2002 VW diesel Jetta turbo with great results so far and it still gets 65 mpg after 10 years driving!
Posted on Apr 11, 2011
Check your oil.
If it is overfilled, milky, or smells like gas. Your going to need to change that ASAP. It sounds like the float has stuck in the past or is still sticking, and it has flooded the crankcase with gas, which has mixed with the oil. And because it is overfilled it comes through the breather hose into the carb. This also explains the smoke most probably because the oil is spewing in the carb through the breather and being burned.
Posted on Jul 05, 2011
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