You are here:
- Home
- Home/Garden
- Home Appliances
- Small Engines (Lawn Mowers, etc.)
- 16.5 hp briggs and stratton motor
Small Engines (Lawn Mowers, etc.)/16.5 hp briggs and stratton motor
Advertisement
Question
Hi ive got a 16.5 horsepower briggs and stratton overhead valve engine. (vert. shaft) this motor runs good, idles up and down fine but it blows oil out the crankcase breather tube (it goes up into the air filter) i took the breather off and cleaned it, its fine. i turned the motor over while watching inside the crankcase breather area and theres a small hole in the bottem and about 20 to 30 seconds after turning it over oil started coming out this small hole. evidently its getting enough oil up into the crankcase breather area and its coming out the tube after running a bit. i changed the oil (30 wt.) and filter but that didnt help. again this engine runs good, doesnt smoke and idles and revs good. any ideas? thanks jonathan
Is the a dipstick oring on the dipstick? Once in a while the dipstick o-ring will leak causing a vacuum leak. A vacuum leak can cause a loss of crankcase vacuum causing oil to enter the air filter.
Briggs does not publish any crankcase vacuum specifications but you can use a rubber cork with a hole drilled in it to check the vacuum. Connect a vacuum gauge and insert the cork into the dipstick tube to check for vacuum.
Related Articles
Answers by Expert:
Eric A. Jones
Expertise
Lawnmower Repair . Certified Master Service Technician from B&S. Have 13 years experience on B&S, Lawn Chief, Weed Eater, Echo, Peerless, Wheel Horse, Snapper, Atlas, MTD, McCulloch, Homelite and many other numerous brands. Specialize in electrical repair.
Experience
Born and raised in the midwest. Started tinkering with engines when I was about 14 on my Suzuki RM-80. I began lawn mower repair at a small hardware store. I knew absolutely nothing. I read lots of repair manuals and met an older fellow who taught me many lessons. I continued working on small engines through high school and paid my way through college working on mowers at the same hardware store. Decided to get away from the midwest and mower repair so I joined the Air Force. I repaired air traffic control electronic equipment and ended up in Hawaii where I got a part time job at Small Engine Clinic. I gained a lot of experience from the Small Engine Clinic and had a blast repairing small engines. I then took the Briggs and Stratton Master Service Technician test and earned my MST. I then traveled to Wisconsin where I attended the factory update training seminar and received formal training. I received a scholarship from the Air Force and am currently pursuing another degree.
©2012 About.com, a part of The New York Times Company. All rights reserved.