Gas in the oil, or oil in the gas in this case... - Snowblower Forum : Snow Blower Forums
 
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post #1 of 7 Old 12-11-2018, 01:27 PM Thread Starter
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Gas in the oil, or oil in the gas in this case...

Got this guy's machine. It's a 173CC Briggs on a Craftsman 24 inch. It smoked like CRAZY filled my entire block with smoke. So I figure, first thing, is too much oil in the machine. Well, it takes about 18 oz of oil, and OVER 40 ounces came out. MOSTLY GAS.



It came running out of the machine like water. In fact, my first reaction was "how the heck did all that water get in there? Then I said "duh, it's gas".



So whatta ya think? I'm going to do a leak down test later, I have to take my wife to the dentist. I'm pretty certain it's the carb leaking.

Last edited by jsup; 12-11-2018 at 01:30 PM.
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post #2 of 7 Old 12-11-2018, 01:58 PM
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I'm trying to picture how high up that much liquid must have been in the crankcase. Wow.

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post #3 of 7 Old 12-11-2018, 02:05 PM
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Your correct on the carb leaking....stuck needle.
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post #4 of 7 Old 12-11-2018, 03:05 PM
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A fuel shutoff or routinely using the existing one would help, after repairing\replacing the needle and seat.

Toro 8/24 (38080) 1989
Toro 421-QZE (38585) 2008

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post #5 of 7 Old 12-11-2018, 03:51 PM Thread Starter
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No fuel shut off on this. Carb ordered.



I have a set of hose pinch pliers on it for now. Don't think there's any cyl wall damage or ring damage. No indication there is.
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post #6 of 7 Old 12-11-2018, 05:49 PM
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I guess that's just another example of why it's not a bad idea to have a fuel shutoff on every piece of equipment, and to shut it after each use. I like to shut it, then run the residual fuel in the line out, each time. Of course that would mean it would take you longer to realize you a leaky float valve.....



Had a lawn tractor that was dumping gas into the cylinder, so much that the tractor had hydro-lock, which I first mistook for a starter issue. It can do some serious damage if you don't catch the cause early enough.



When I get a machine that's leaking internally like that, after the initial carburation problem is fixed, I like to drain the oil and replace it with some cheap dino oil, and run the machine up for a few cycles. With the oil nice and hot, I then like to drain it out again, and replace it with a good quality synthetic. That way I'm sure most or all the gas that got down into the oil sump is pretty much gone.



LOL.....I can imagine the smoke Jsup!


It's amazing that it ran at all.......... Hopefully the washed out oil didn't cause any scoring.......

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post #7 of 7 Old 12-11-2018, 06:27 PM Thread Starter
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I'm going to give it back to the guy, and tell him to call me at the end of the season, and I'll have to do an oil change at that time. We don't get a storm a week. A couple a season. I agree with your methods, it's just not my machine, and it's 20 minutes away. So I'll have to depend on the owner to do it... or pay me to do it, the same guy who:


Filled the gas tank to the point of spilling gas
Broke the gas fill screen to the point it's GONE, just the plastic frame remains.

Has the shoes adjusted 1/2 inch off the ground
and insists the machine wasn't used much, so it shouldn't be broken.


But it's still shiny.
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