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-   -   Four cycle engine problem (http://www.peachparts.com/shopforum/showthread.php?t=229498)

300DandTD 08-04-2008 07:33 AM
Four cycle engine problem
 
OK mechanic types. I went to start my emegency generator and found gasoline in the lube oil. What would allow this to happen ? It is a 13 horse 4 cycle Generac 6500. There is a significant amount of gasiline in the lube oil.

dannym 08-04-2008 08:32 AM
When was the last time the oil was changed?

catmandoo62 08-04-2008 09:25 AM
does it have a gas shut-off valve.if so if the gas got left on it could bleed by the needle valve in the carb and flood the engine with gas.drain the oil and refill and run it.

cscmc1 08-04-2008 10:19 AM
Quote:
Originally Posted by catmandoo62 (Post 1929470)
does it have a gas shut-off valve.if so if the gas got left on it could bleed by the needle valve in the carb and flood the engine with gas.drain the oil and refill and run it.
Ditto.

kerry 08-04-2008 10:38 AM
If it has a mechanical fuel pump, the diaphragm can rupture, allowing gas into the crankcase.

MS Fowler 08-04-2008 11:37 AM
Quote:
Originally Posted by cscmc1 (Post 1929506)
Ditto.
This has been known to happen to Cub Cadets with a gas shut off valve. One owner's wife, ran a Cub like that to destruction. Gas is not a good lubricant.

cscmc1 08-04-2008 11:42 AM
Quote:
Originally Posted by MS Fowler (Post 1929569)
This has been known to happen to Cub Cadets with a gas shut off valve. One owner's wife, ran a Cub like that to destruction. Gas is not a good lubricant.
Yup -- my old Vespa did the same thing!


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