Posted by ScottyHOMEy on August 03, 2008 at 17:35:08 from (71.241.192.13):
In Reply to: Re: Gas in oil? posted by cris on August 03, 2008 at 11:59:12:
That's a big question. Where to start?
You've had advice, all good as far as I've read, from different folks, suggesting the different things that might cause it. Read all that back over and go to it.
Just for starters, get a clean coffee can (wash it to get most of the coffee scent out of it) and draw a pint or so of oil out of the lower petcock on the oil pan into it. Swirl that around (pretend you're at a wine tasting) and give it a sniff to see if it smells strongly of gas.
If so you need to look for a leaky valve on the sediment bowl, a leaky float in the carb, or a leaky or obstructed float needle. I listed those in kind of reverse order of probablility, but it could be any one or a combination of any two or all three.
If the oil you get out doesn't smell especially heavily of gas, you could still have a leaky valve or fitting up around the sediment bowl that could be running down to mix with regular oil as someone suggested. Perfectly plausible. A jar under the sediment bowl might show up a dip in the valve or the connection to the line. But it might also be seeping out the thread of the bowl into the tank, which might not drip under the bowl but instead run forward down the bottom of the tank and show up further forward.
If the tractor is generally running okay, eliminate the carb and bowl, fittings and lines before worrying about valves and seepage past the rings.
But don't run the tractor long if the crankcase oil smells gassy, and especially not if the oil level is high enough that it runs freely from the top petcock (That's something to test before you do draw the sample into the coffee can for the sniff test). It could be gas or water raising the oil level. If a quick sample from the pan drain drawn into something like a mayonnaise jar doesn't show any water, it's quite likely over full with gas and you need to find the source.
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