Small Engines (Lawn Mowers, etc.)/snowblower

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Question
QUESTION: craftsman 5.5HP model 88355 with Tecumseh  engine-LH195sp snow blower blows oil out breather hose when on incline only. it maintains oil on level runs. only comes out on inclines. assembly appears to be behind carb what needs to be repaired ? oil not over filled

ANSWER: It is coming out of the breather, behind the carb.

Are you using SAE 5W-30 oil?  The is a possibility the breather is defective but this is pretty rare.  There could also be a seal or o-ring leaking causing the engine not to maintain vacuum...the engine needs to maintain vacuum to keep oil from leaking out...the breather is supposed to let engine crankcase pressure out and a check valve prevents atmospheric pressure (air) from entering back in.

There are drain hole in the breather...but again it is very, very rare they clog.

Check the dipstick o-ring/gasket and make sure it is sealing...this is the most common leak area. Also, you can try changing the oil as this sometimes helps.

How steep of an incline cause the oil to come out?  There is an incline limit but it is pretty steep.

Eric

---------- FOLLOW-UP ----------

QUESTION: THANK YOU ERIC-- YES I AM USING 5W-30 OIL CHANGED EVERY YEAR AND THIS WAS FIRST USAGE AND NOT OVERFILLED WHAT SEAL OR O-RING NEEDS TO BE CHECKED DIPSTICK O-RING IS SEALING OIL COMES OUT THE HOSE ON CRANKCASE VENT OR BREATHER STARTS TO COME OUT AT ABOUT 45DEGREES OR BETTER RUNS FINE ON LEVEL GROUND AND MAINTAINS PROPER OIL LEVEL. WHAT IS THE INCLINE LEVEL AND WHEN EXCEEDED IS THIS WHAT OCCURS?

         THANK YOU
         JOE

Answer
45 degrees is pretty steep. If I recall old manuals used to state a 30 degree limit but is has been many yeas since I've seen older manuals.

Have you ran the blower on the steep angle before?

There may be an o-ring in the top of the dipstick cap.  

This video shows how to check for crankcase vacuum.

https://www.youtube.com/watch?v=AKaemaXp6gY

You can also make a manometer out of vinyl tubing and a board.  There are lots of internet pages describing how to make a manometer.

Let me know if the engine maintains a vacuum.
Eric  

Small Engines (Lawn Mowers, etc.)

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Eric A. Jones

Expertise

Lawnmower Repair . Certified Master Service Technician from B&S. Have 23 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. Continued working on mowers part time as I completed 20 years of military. Retired from the military on a Friday and continued in the lawn and garden industry the next Monday.

Education/Credentials
MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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