Small Engine Diagnostics Quiz
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9 ECHO 1
Joined: Aug 2009
Posts: 12,467
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From: Missouri
Small Engine Diagnostics Quiz
Single cylinder <strike>2</strike> 4 stroke gas powered engine
Customer Complaint:
- Engine was making strange, loud noises
- Engine was emitting smoke from exhaust
- Upon inspection oil was empty
- Customer replaced oil
Personal Observations:
- Large amount of oil around the base of the engine.
- Pull-start cord will not turn over the motor
*************
Feel free to ask questions to see if you can guess what happened.
My first hypothesis turned out to be right was right.
After a few trys, or if someone gets the answer, I will reveal how I came to my conclusion.
Customer Complaint:
- Engine was making strange, loud noises
- Engine was emitting smoke from exhaust
- Upon inspection oil was empty
- Customer replaced oil
Personal Observations:
- Large amount of oil around the base of the engine.
- Pull-start cord will not turn over the motor
*************
Feel free to ask questions to see if you can guess what happened.
My first hypothesis turned out to be right was right.
After a few trys, or if someone gets the answer, I will reveal how I came to my conclusion.
FTE Leadership Emeritus
Joined: Aug 2007
Posts: 42,085
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From: Lakewood, Ca.
I'll take a W.A.G.
Customer put oil in crankcase of a motor that doesn't use oil in the crankcase. When they tried to start the motor, oil traveled up through the transfer ports and hydrolocked the piston.
Customer put oil in crankcase of a motor that doesn't use oil in the crankcase. When they tried to start the motor, oil traveled up through the transfer ports and hydrolocked the piston.
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9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
My bad
Free point to Steve for catching my error. No the oil was in the right spot. There is an OIL dipstick.
(Maybe he used the wrong 710 fluid haha)
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9 ECHO 1
Joined: Aug 2009
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From: Missouri
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9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
Answer:
Engine was ran without oil and started to seize. Connecting rod snapped, and cracked the block.
I came to my conclusion by removing the spark plug and inspecting the piston. I was able to push the piston down with a long drill bit. The pull start string would now move about 1/2 inch and push the piston back up, but could not pull the piston down. At this point I disassembled the engine from the machine and confirmed my diagnosis.
Engine was ran without oil and started to seize. Connecting rod snapped, and cracked the block.
I came to my conclusion by removing the spark plug and inspecting the piston. I was able to push the piston down with a long drill bit. The pull start string would now move about 1/2 inch and push the piston back up, but could not pull the piston down. At this point I disassembled the engine from the machine and confirmed my diagnosis.
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d0n_3d
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Dec 7, 2003 09:01 AM