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  #1  
Old 11-18-2011, 01:29 AM
Lordtimothy Lordtimothy is offline
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Location: Nebraska
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Hmmm Can you figure this out??

One of the threads here made me think of something that happened a couple of years ago. It really caused a bunch of head scratching for everyone......so can you figure out what the problem was??

The situation.
4 Different mowers (type does not matter as it is a engine problem)
First mower had a 26hp Briggs ELS engine 225 hours
Second mower had a 26hp Briggs ELS engine 20 hours
Third mower had a 25hp Kohler Engine 5 hours
Forth mower had a 30hp Kohler Engine 5 hours

The mowers were to run all day and night with just stops for fuel and oil checks. Every day we would go down to the same gas station and pick up fresh fuel once or twice a day. Fuel sled with 3 15gallon tanks.

The first machine had been running 24 hours a day for 5 days
Second for 20 hours
Third and fourth were just started 5 hours before....

it happened:

All 4 mowers were shut down and refueled and oil checked. When we checked the oil.......all 4 of the crankcases were full, at least a quart or more oil in the crankcases. Didn't smell of gasoline at all.
Hmmmmm all 4 engines were running good so the boss just decided to drain 'em and let them run, there was a chance the rings hadn't set on the low hour ones and who knows about the high hour one. First time this had ever happened ever.

Engines drained, new oil and a refill of fuel and off they go again.......5 hours later we check again........all crankcases full AGAIN. Now we know we have a problem.

Called the engine companies and they came out and did all types of checks but the engines were all in perfect working order. Compression good, power good all that. Was told there wasn't anything wrong with them. So we went back to running them and just draining the oil every time we stopped......2 days later the problem just went away never to return.

Can you figure out what caused the crankcases to fill up?? We did figure it out a week or so after this all happened. So lets hear what you think.
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  #2  
Old 11-18-2011, 04:23 AM
Darryl G Darryl G is offline
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Poltergeist!
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  #3  
Old 11-18-2011, 08:17 AM
mowisme mowisme is online now
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maybe..

crank case venting getting plugged due to conditions?
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  #4  
Old 11-18-2011, 08:25 AM
Jimslawncareservice Jimslawncareservice is online now
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I have no clue, I just want to know why.
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  #5  
Old 11-18-2011, 08:47 AM
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KrayzKajun KrayzKajun is online now
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Ethanol in fuel ate throught the seals
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  #6  
Old 11-18-2011, 08:58 AM
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KeystoneLawn&Landscaping KeystoneLawn&Landscaping is offline
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Cranky crankcase Troll?........Can't wait for the answer, I think I'm right! ......Seriously though, I was thinking floats hanging in carbs, but all 4 and you did say it wasn't gas. Looking forward to the answer.
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Last edited by KeystoneLawn&Landscaping; 11-18-2011 at 09:06 AM.
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  #7  
Old 11-18-2011, 10:08 AM
fastlane fastlane is offline
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was it a neighbor who did not like the noise of mowers running 24hrs a day?
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  #8  
Old 11-18-2011, 10:16 AM
Jimslawncareservice Jimslawncareservice is online now
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What was the purpose of this test anyway
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  #9  
Old 11-18-2011, 10:31 AM
davidcalhoun davidcalhoun is offline
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Hummmm, the neighbor theory............ Exmark came over and tried to sabotage your test.
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  #10  
Old 11-18-2011, 01:41 PM
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piston slapper piston slapper is offline
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Bad kanooter valve?
You didnt buy your oil from the same guy that sold jack his beanstalk beans?
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